Seagate CHEETAH 15K.5 SCSI User Manual

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Product Manual

Cheetah 15K.5 SCSI

ST3300655LW ST3300655LC ST3146855LW ST3146855LC ST373455LW ST373455LC

100384776 Rev . F August 2007

Publication number: 100384776, Rev. F

November 2007

Seagate, Seagate Technology and the Wave logo are registered trademarks of Seagate Technology LLC in the United States and/or other countries. Cheetah, SeaTools and SeaTDD are either trademarks or registered trademarks of Seagate Technology LLC or one of its affiliated companies in the United States and/ or other countries. All other trademarks or registered trademarks are the property of their respective owners.

One gigabyte, or GB, equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment and formatting. Quantitative usage examples for various applications are for illustrative purposes. Actual quantities will vary based on various factors, including file size, file format, features and application software. Seagate reserves the right to change, without notice, product offerings or specifications.

Cheetah 15K.5 SCSI Product Manual, Rev. F

Contents

1.0 Scope. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2.0 Applicable standards and reference documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.1 Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.1.1 Electromagnetic compatibility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.1.2 Electromagnetic susceptibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.2 Electromagnetic compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.3 European Union Restriction of Hazardous Substances (RoHS) . . . . . . . . . . . . . . . . . . . . . 4

2.4 Reference documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.0 General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.1 Standard features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.2 Media characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.3 Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.4 Reliability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.5 Formatted capacities. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.5.1 Programmable drive capacity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.6 Factory installed accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.7 Options (factory installed) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.8 Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

4.0 Performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.1 Internal drive characteristics (transparent to user) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.2 SCSI performance characteristics (visible to user) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.2.1 Seek time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4.2.2 Format command execution time (minutes) [1] . . . . . . . . . . . . . . . . . . . . . . . . . 12

4.2.3 Generalized performance characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4.3 Start/stop time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4.4 Prefetch/multi-segmented cache control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4.5 Cache operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4.5.1 Caching write data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4.5.2 Prefetch operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

5.0 Reliability specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.1 Error rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.1.1 Recoverable Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.1.2 Unrecoverable Error. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.1.3 Seek errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.2 Reliability and service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.2.1 Annualized Failure Rate (AFR) and Mean Time Between Failures (MTBF) . . . 16

5.2.2 Preventive maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.2.3 Hot plugging Cheetah 15K.5 SCSI disc drives. . . . . . . . . . . . . . . . . . . . . . . . . . 17

5.2.4 S.M.A.R.T. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5.2.5 Thermal monitor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

5.2.6 Drive Self Test (DST). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

5.2.7 Product warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

6.0 Physical/electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

6.1 AC power requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

6.2 DC power requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

6.2.1 Conducted noise immunity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

6.2.2 Power sequencing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

6.2.3 Current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

6.3 Power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

6.4 Environmental limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Cheetah 15K.5 SCSI Product Manual, Rev. F

6.4.1 Temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

6.4.2 Relative humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

6.4.3 Effective altitude (sea level) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

6.4.4 Shock and vibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

6.4.5 Air cleanliness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

6.4.6 Corrosive environment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

6.4.7 Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

6.4.8 Electromagnetic susceptibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

6.5 Mechanical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

7.0 Defect and error management. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

7.1 Drive internal defects. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

7.2 Drive error recovery procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

7.3 SCSI systems errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

7.4 Background Media Scan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

7.5 Media Pre-Scan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

7.6 Deferred Auto-Reallocation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

7.7 Idle Read After Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

8.0 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

8.1 Drive ID/option select header. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

8.1.1 Notes for Figures 10 and 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

8.1.2 Function description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

8.2 Drive orientation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

8.3 Cooling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

8.4 Drive mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

8.5 Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

9.0 Interface requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

9.1 General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

9.2 SCSI interface messages supported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

9.3 SCSI interface commands supported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

9.3.1 Inquiry Vital Product data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

9.3.2 Mode Sense data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

9.4 SCSI bus conditions and miscellaneous features supported. . . . . . . . . . . . . . . . . . . . . . . 57

9.5 Synchronous data transfer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

9.5.1 Synchronous data transfer periods supported . . . . . . . . . . . . . . . . . . . . . . . . . . 58

9.5.2 REQ/ACK offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

9.6 Physical interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

9.6.1 DC cable and connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

9.6.2 SCSI interface physical description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

9.6.3 SCSI interface cable requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

9.6.4 Mating connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

9.7 Electrical description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

9.7.1 Multimode—SE and LVD alternatives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

9.8 Terminator requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

9.9 Terminator power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

9.10 Disc drive SCSI timing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

9.11 Drive activity LED. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

10.0 Seagate Technology support services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Cheetah 15K.5 SCSI Product Manual, Rev. F

iii

List of Figures

Figure 1. Typical ST3300655LW drive +5 V LVD current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Figure 2. ST3300655LC DC current and power vs. IOPS (LVD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Figure 3. ST3146855LC DC current and power vs. IOPS (LVD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 4. ST373455LC DC current and power vs. IOPS (LVD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Figure 5. Locations of the HDA temperature check point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Figure 6. Recommended mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Figure 7. LW mounting configuration dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Figure 8. LC mounting configuration dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Figure 9. J5 jumper header (on LW models only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Figure 10. J6 option select header (on LW models only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Figure 11. Air flow (suggested). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Figure 12. LW model drive physical interface (68-pin J1 SCSI I/O connector). . . . . . . . . . . . . . . . . . . . . 59

Figure 13. LC model drive physical interface (80-pin J1 SCSI I/O connector) . . . . . . . . . . . . . . . . . . . . . 60

Figure 14. SCSI daisy-chain interface cabling for LW drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Figure 15. Nonshielded 68-pin SCSI device connector used on LW drives . . . . . . . . . . . . . . . . . . . . . . . 64

Figure 16. Nonshielded 80-pin SCSI SCA-2 connector used on LC drives . . . . . . . . . . . . . . . . . . . . . . . 65

Figure 17. Typical SE-LVD alternative transmitter receiver circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Cheetah 15K.5 SCSI Product Manual, Rev. F

1.0 Scope

This manual describes Seagate® Technology LLC, Cheetah® 15K.5 SCSI disc drives. Cheetah 15K.5 SCSI drives support the small computer system interface (SCSI) as described in the ANSI

SCSI SPI-4 interface specifications to the extent described in this manual. The SCSI Interface Manual (part number 100293069) describes general SCSI interface characteristics of this and other families of Seagate drives.

From this point on in this product manual the reference to Cheetah 15K.5 SCSI models is referred to as “the drive” unless references to individual models are necessary.

Cheetah 15K.5 SCSI Product Manual, Rev. F

2.0 Applicable standards and reference documentation

The drive has been d evelope d as a system p eriphe ral to the hig hest st and ards of desig n and constru c tion. The drive depends upon its host equipment to provide adequate power and environment in order to achieve optimum performance and compliance with applicable industry and governmental regulations. Special attention must be given in the areas of safety, power distribution, shielding, audi ble noise con trol , an d tempe ratu re reg ulation. In particular, the drive must be securely mounted in order to guarantee the specified performance characteristics. Mounting by bottom holes must meet the requirements of Section 8.4.

2.1 Standards

The Cheetah 15K.5 SCSI family complies with Seagate standards as noted in the appropriate sections of this Manual, the Seagate Parallel SCSI Interface Manual, part number 100293069, and the SCSI Commands Ref- erence Manual, part number 100293068.

The Cheetah 15K.5 SCSI disc drive is a UL recognized component per UL1950, CSA certified to CSA C22.2 No. 950-95, and VDE or TUV certified to EN60950.

2.1.1 Electromagnetic compatibility

The drive, as delivered, is designed for system integration and installation into a suitable enclosure prior to use. As such the drive is supplied as a subassembly and is not subject to Subpart B of Part 15 of the FCC Rules and Regulations nor the Radio Interference Regulations of the Canadian Department of Communications.

The design characteristics of the drive serve to minimize radiation when installed in an enclosure that provides reasonable shield ing. As such, t he dr ive is cap able of me eting th e C lass B l imit s of the FC C Rules a nd R eg ulations of the Canadian Department of Communications when properly packaged. However, it is the user’s responsibility to assure that the drive meets the appropriate EMI requirements in their system. Shielded I/O cables may be required if the enclosure does not provide adequate shielding. If the I/O cables are external to the enclosure, shielded cabl es sh ould be u sed, wi th the shields gr ounde d to the enclosur e and to the host co ntroller.

2.1.2 Electromagn etic susc ept ibili ty

As a component assembly, the drive is not required to meet any susceptibility performance requirements. It is the responsibility of those integrating the drive within their systems to perform those tests required and design their system to ensure that equipment operating in the same system as the drive or external to the system does not adversely affect the performance of the drive. See Table 3, DC power requirements.

Cheetah 15K.5 SCSI Product Manual, Rev. F

2.2 Electroma gnetic compliance

Seagate uses an independent laboratory to confirm compliance to the directives/standard(s) for CE Marking and C-Tick Marking. T he dr ive was tested in a r epres ent ative system for typical applications. The select ed sys tem represents the most popular characteristics for test platforms. The system configurations include:

• Typical current use microprocessor

• 3.5-inch floppy disc drive

• Keyboard

• Monitor/display

• Printer

• External modem

• Mouse Although the test system with this Seagate model complies to the directives/standard(s), we cannot guarantee

that all systems will comply. The computer manufacturer or system integrator shall confirm EMC compliance and provide CE Marking and C-Tick Marking for their product.

Electromagnetic compliance for the European Union

If this model has the CE Marking it complies with the European Union requirements of the Electromagnetic Compatibility Directive 89/336/EEC of 03 May 1989 as amended by Directive 92/31/EEC of 28 April 1992 and Directive 93/68/EEC of 22 July 1993.

Australian C-Tick

If this model has the C-Tick Marking it complies with the Australia/New Zealand Standard AS/NZS3548 1995 and meets the Electromagnetic Compatibility (EMC) Framework requirements of Australia’s Spectrum Management Agency (SMA).

Korean MIC

If this model has the Korean Min ist ry of Infor mat ion and Com munication (MIC) logo, it complie s with par agr aph 1 of Article 11 of the Electromagnetic Compatibility (EMC) Control Regulation and meets the Electromagnetic Compatibility Framework requirements of the Radio Research Laboratory (RRL) Ministry of Information and Communication Republic of Korea.

This drive has been tested and complies with the Electromagnetic Interference/Electromagnetic Susceptibility (EMI/EMS) for Class B products.

Taiwanese BSMI

If this model has the Chin ese N ation al Standard (CNS) 13438 marking, it co mplies w ith Chi n ese Nationa l Standard (CNS) 13438 and meets the Electromagnetic Compatibility (EMC) Framework requirements of the Taiwanese Bureau of Standards, Metrology, and Inspection (BSMI).

2.3 European Uni on Restric tion of Hazardous Substances (RoHS)

The European U nion Restr icti on of Hazard ous S ubst ance s (RoHS ) Dire cti ve re strict s the p resen ce of ch emic al substances, including Lead (Pb), in electronic products effective July 2006.

A number of parts and materials in Seagate products are procured from external suppliers. We rely on the representations of our suppliers regarding the presence of RoHS substances in these parts and materials. Our supplier contracts require compliance with our chemical substance restrictions, and our suppliers document their compliance wi th our re quire ment s by providing material conte nt declar ations for al l par ts an d mater ial s for the disc drives documented in this publication. Current supplier declarations include disclosure of the inclusion of any RoHS-regulated substance in such parts or materials.

Cheetah 15K.5 SCSI Product Manual, Rev. F

Seagate also has internal system s in place to en sure ongoing complian ce with the RoHS Directive and all laws and regulations which restrict chemical conte nt in electron ic produ cts. T hese system s include sta ndar d oper ating procedures that ensure that restricted substances are not utilized in our manufacturing operations, laboratory analytical validation testing, and an internal auditing process to ensure that all standard operating procedures are complied with.

2.4 Reference documents

Cheetah 15K.5 SCSI Installation Guide Seagate P/N 100384777 Safety and Regulatory Agency Specifications Seagate P/N 75789512 SCSI Commands Reference Manual Seagate P/N 100293068 Parallel SCSI Interface Product Manual Seagate P/N 100293069

Applicable ANSI small computer system interface (SCSI) document numbers:

T10/1143D Enhanced SCSI Parallel Interface (EPI) T10/1416D Primary Commands-3 (SPC-3) T10/1417D SCSI Block Commands (SBC-2) T10/1157D SCSI Architectural Model-2 (SAM-2)

T10/1365D SPI-4 (SCSI Parallel Interface version 4) SFF-8451 Specification for SCA-2 Unshielded Connections Package Test Specification Seagate P/N 30190-001 (under 100 lb.) Package Test Specification Seagate P/N 30191-001 (over 100 lb.) Specification, Acoustic Test Requirements, and Procedures Seagate P/N 30553-001 In case of conflict between this document and any referenced document, this document takes precedence.

Cheetah 15K.5 SCSI Product Manual, Rev. F

3.0 General description

Cheetah 15K.5 SCSI drives combine Tunneling Magnetoresistive (TMR) heads and a wide Ultra320 SCSI interface to provide high performance, high capacity data storage for a variety of systems including engineering workstations, network servers, mainframes, and supercomputers.

Ultra320 SCSI uses negotiated tra nsfer rates. T hese transfer rates will occur only if your host adap ter sup port s these data tran sfer r ates and is co mp atible with the requ ired h ardwa re r equir emen ts of the I/O circu it type. This drive also operates at SCSI-1 and SCSI-2 data transfer rates for backward compatibility with non-Ultra/Ultra2/ Ultra160/Ultra320 SCSI host adapters.

Table 1 lists the features that differentiate the Cheetah 15K.5 SCSI models.

Table 1: Drive model number vs. differentiating features

Model number

ST3300655LW ST3146855LW ST373455LW

ST3300655LC ST3146855LC ST373455LC

Number of active heads I/O circuit type [1]

8 4

Single-ended (SE) and low voltage differential (LVD)

2 8

Single-ended (SE) and low voltage differential (LVD)

Number of I/ O connector pins

[1] See Section 9.6 for details and definitions. The drive records and recovers data on approximately 70 mm non-removable discs. The drive supports the Small Computer System Interface (SCSI) as described in the ANSI SCSI interface

specifications to the extent described in this manual (volume 1), which defines the product performance characteristics of the Cheetah 15K.5 SCSI family of drives, the Parallel SCSI Interface Manual, part number 100293069, and the SCSI Commands Reference Manual, part number 100293068, which describe the general interface characteristics of this and other families of Seagate SCSI drives.

The drive’s interface supports multiple initiators, disconnect/reconnect, self-configuring host software, and logical block addressing.

The head and disc assembly (HDA) is sealed at the factory. Air circulates within the HDA through a nonreplaceable filter to maintain a contamination-free HDA environment.

Never disassemble the HDA and do not attempt to service items in the sealed enclosure (heads, media, actuator, etc.) as this requires special facilities. The drive contains no replaceable parts. Opening the HDA voids your warranty.

Cheetah 15K.5 SCSI dri ves use a dedicate d la nding zone at the innermo st radi us of the media to elimin ate the possibility of destroying or degrading data by landing in the data zone. The drive automatically goes to the landing zone when power is removed.

Cheetah 15K.5 SCSI Product Manual, Rev. F

An automatic shipping lock prevents potential damage to the heads and discs that results from movement during shipping and handling. The shipping lock automatically disengages when power is applied to the drive and the head load process begins.

A high-performance actuator assembly with a low-inertia, balanced, patented, straight-arm design provides excellent performance with minimal power dissipation.

3.1 Standard featu re s

The Cheetah 15K.5 SCSI family has the following standard features:

• Perpendicular recording technology.

• Integrated Ultra320 SCSI interface.

• Multimode SCSI drivers and receivers—single-ended (SE) and low voltage differential (LVD)

• 16 bit I/O data bus

• Asynchronous and synchronous data transfer protocol

• Firmware downloadable via SCSI interface

• Selectable even byte sector sizes from 512 to 528 bytes/sector

• Programmable sector reallocation scheme

• Flawed sector reallocation at format time

• Programmable auto write and read reallocation

• Reallocation of defects on command (post format)

• ECC burst correction length of up to 400.

• Sealed head and disc assembly

• No preventative maintenance or adjustment required

• Dedicated head landing zone

• Embedded servo design

• Self diagnostics performed when power is applied to the drive

• Zoned bit recording (ZBR)

• Vertical, horizontal, or top down mounting

• Dynamic spindle b rake

• 16,384 kbytes data buffer

• Hot plug compatibility (Section 9.6.4.2 lists proper host connector needed) for LC model drives

• Drive Self Test (DST)

• Supports SCSI bus fairness

3.2 Media char ac teristics

The media used on the drive has an aluminum substrate coated with a thin film magnetic material, overcoated with a proprietary protective layer for improved durability and environmental protection.

Cheetah 15K.5 SCSI Product Manual, Rev. F

3.3 Performance

• Supports industry standard Ultra320 SCSI interface

• Programmable multi-segmentable cache buffer (see Section 4.5)

• 15k RPM spindle. Average latency = 2.0 msec

• Command queuing of up to 64 commands

• Background processing of queue

• Supports start and stop commands (spindle stops spinning)

3.4 Reliability

• Annualized Failure Rate (AFR) of 0.62%

• Increased LSI circuitry integration

• Incorporates industry-standard Self-Monitoring, Analysis and Reporting Technology (S.M.A.R.T.)

• 5-year warranty

3.5 Formatted ca pacities

St an dard OEM mo del s ar e formatte d to 512 bytes per block. The sector size is sel ect ab le at fo rma t time. Users having the necessary equipment may modify the data block size before issuing a format command and obtain different formatted capacities than those listed.

To provide a stable target capacity environment and at the same time provide users with flexibility if they choose, Seagate recommends product planning in one of two modes:

1. Seagate desi g ns specify cap acity po i nt s at cert ain sect or si zes tha t Seagate gu ara ntees cur ren t and futu re

products will meet. We recommend customers use this capacity in their project planning, as it ensures a

stable operating point with backward and forward compatibility from generation to generation. The current

guaranteed operating points for this product are:

Sector Size

512 585,937,500 22ECB25C 286,749,488 11177330 143,374,744 88BB998 514 574,712,644 22416B44 282,050,768 10CFC0D0 141,025,384 867E068 520 573,653,847 22314357 280,790,184 10BC84A8 140,395,092 85E4254 522 570,053,000 21FA5188 279,041,740 10A1D6CC 139,463,602 8500BB2 524 566,007,800 21BC97F8 275,154,368 106685C0 137,577,184 83342E0 528 557,874,778 21407E5A 272,662,935 10408197h 136,331,467 82040CBh

ST3300655LW ST3300655LC

Decimal Hex Decimal Hex Decimal Hex

ST3146855LW ST3146855LW

ST373455LW ST373455LC

2. Seag ate drives also may be used at the maximum available capacity at a given sector size, but the excess

capacity above the gu aran teed leve l w ill va ry betwe en 10K an d 15K fam ilie s and fr om g ener ation to gener -

ation, depending on how each sector size actually formats out for zone frequencies and splits over servo

bursts. This added capacity potential may range from 0.1 to 1.3 percent above the guaranteed capacities

listed above. Using the drives in this manner gives the absolute maximum capacity potential, but the user

must determine if the extra capacity potential is useful, or whether their assurance of backward and for-

ward compatibility takes precedence.

Cheetah 15K.5 SCSI Product Manual, Rev. F

3.5.1 Programmable drive capacity

Using the Mode Select command, the drive can change its capacity to something less than maximum. See the Mode Select Parameter List table in the SCSI Interface Manual. Refer to the Parameter list block descriptor number of blocks field. A value of zero in the number of blocks field indicates that the d rive sh all no t cha nge the capacity it is currently formatted to have. A number in the number of blocks field that is less than the maximum number of LBAs changes the total drive capacity to the value in the block descriptor number of blocks field. A value greater than the maximum number of LBAs is rounded down to the maximum capacity.

3.6 Factory instal led accessories

OEM St andard drives are shipped with the Cheetah 15K .5 Inst allati o n Guide , p art num ber 100 38477 7, and the Safety and Regulatory A gency Speci ficati o ns, p art num ber 757895 12 (un l ess other wise specifi ed) . The fa ctory

also ships with the drive a small bag of jumper plugs used for the J5 and J6 option select jumper headers (on LW models only).

3.7 Options (factory installed)

All customer requested options are incorporated during production or packaged at the manufacturing facility before shipping. Some of the options available are (not an exhaustive list of possible options):

• Other capacities can be ordered depending on sparing scheme and sector size requested.

• Single unit shipping pack. The drive is normally shipped in bulk packaging to provide maximum protection against transit damage. U nit s shipped individually require add itional pro tection as pr ovided by th e singl e unit shipping pack. Users planning single unit distribution should specify this option.

• The Cheetah 15K.5 Installation Guide, part number 100384777, usually ships with each standard OEM drive. Extra copies may be ordered.

• The Safety and Regulatory Agency Specifications, part number 75789512, usually ships with each standard OEM drive. Extra copies may be ordered.

3.8 Accessories

The following accessories are available. All accessories may be installed in the field.

• Single unit shipping pack.

Cheetah 15K.5 SCSI Product Manual, Rev. F

4.0 Performance characteristics

4.1 Internal drive characteristics (transparent to user)

ST3300655LW ST3300655LC

ST3146855LW ST3146855LC

ST373455LW ST373455LC

Driv e capacity 300.0 146.8 73.4 GBytes (formatted)*,** Read/write heads 8 4 2 Tracks/surface (tot al) 74,340 74,340 74,340 Tracks (user accessible) Tracks/inch 125,000 125,000 125,000 TPI Peak bits/inch 890k 890k 890k BPI Areal Density 110 110 110 Gbits/inch

Internal data rate 960 to 1607 960 to 1607 960 to 1607 Mbits/sec (variable with zone) Disc rotational speed 15k 15k 15k rpm Average rotational latency 2.0 2.0 2.0 msec

* One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environ ment

and formatting.

** Rounded off value.

4.2 SCSI performance characteristics (visible to user)

The values given in Sectio n 4.2.1 appl y to all mode l s of the Ch eet ah 15 K.5 SCSI fam i ly unless otherwise specified. Refer to the Parallel SCSI Interface Manual for additional timing details.

Cheetah 15K.5 SCSI Product Manual, Rev. F

4.2.1 Seek time

Not including controller overhead (msec) Read Write

1,2

Average Typical 3.5 4.0 Single Track Typical 0.2 0.4 Full Stroke Typical 6.8 7.5

1. Typical access times are measured under nom inal conditions of temperature, volt-

age, and horizontal orientation as measured on a representative sample of drives.

2. Access to data = access time + latency time.

4.2.2 Format command execution time (minutes) [1]

ST3300655LW ST3300655LC

ST3146855LW

ST3146855LC

ST373455LW

ST373455LC

Maximum (with verify) 120 90 60 Maximum (no verify) 60 45 30

4.2.3 Generalized performance characteristics

Sustainable disc transfer rate:

Minimum [3] 73 Mbytes/sec Maximum [3] 125 Mbytes/sec

SCSI interface data transfer rate (asynchronous):

Maximum instantaneous one byte wide 5.0 MBytes/sec [3] Maximum instantaneous two bytes wide 10.0 MBytes/sec [3]

Synchronous transfer rate

In low voltage differential (LVD) interface mode 5.0 to 320 MBytes/sec

Sector Sizes: Default 512 byte user data blocks Variable 512 to 528 bytes per sector in even number of bytes per sector.

If n (number of bytes per sector) is odd, then n-1 will be used.

Read/write consecutive sectors on a track Yes Flaw reallocation performance impact (for flaws reallocated at format time using

Negligible

the spare sectors per sparing zone reallocation scheme) Average rotational latency 2.00 msec

Notes for Section 4.2. [1] Execution time measured from receipt of the last byte of the Command Descriptor Block (CDB) to the

request for a Status Byte Transfer to the Initiator (excluding connect/disconnect). [2] Assumes no errors and no sector has been relocated. [3] Assumes system ability to support the rates listed and no cable loss.

Cheetah 15K.5 SCSI Product Manual, Rev. F

4.3 Start/stop time

After DC power at nominal voltage has been applied, the drive becomes ready within 20 seconds if the Motor Start Option is disabled (i.e., the motor starts as soon as the power has been applied). If a recoverable error condition is detected during the start sequence, the drive executes a recovery procedure which may cause the time to become ready to exceed 20 seconds. During spin up to ready time the drive responds to some commands over the SCSI interface in less than 3 seconds after application of power. Stop time is 30 seconds from removal of DC power.

If the Motor Start Option is enabled, the internal controller accepts the commands listed in the SCSI Interface Product Manual less than 3 seconds after DC power has been applied. After the Motor Start Command has been received the drive becomes ready for normal operations within 20 seconds typically (excluding an error recovery procedure). The Motor Start Command can also be used to command the drive to stop the spindle (see the SCSI Commands Reference Manual).

There is no power control switch on the drive.

4.4 Prefetch /m ulti-segmen te d cache contro l

The drive provides prefetch (read look-ahead) and multi-segmented cache control algorithms that in many cases can enhance syste m pe rfor mance . “Ca che” as used herein refer s to th e dr ive bu f fer st orag e space when it is used in cache oper ations. To select prefetch and ca che features the host sends the Mode Select comm and with the proper values in the applicable bytes in Mode Page 08h (see the SCSI Interface Product Manual). Prefetch and cache operation are independent features from the standpoint that each is enabled and disabled independently via the Mode Select command. However, in actual operation the prefetch feature overlaps cache operation somewhat as is noted in Section 4.5.1 and Section 4.5.2.

All default cache and prefetch Mode parameter values (Mode Page 08h) for standard OEM versions of this drive family are given in Table 10.

4.5 Cache operation

Note. Refer to the SCSI Interface Manual for more detail concerning the cache bits.

Of the 16 Mbytes physical buffer sp ace i n the drive, approxim atel y 13,0 00 kbytes can be used as a cache. The buffer is divided into logical segments from which data is read and to which data is written.

The drive keeps track of the logical block addresses of the data stored in each segment of the buffer. If the cache is enabled (see RCD bit in the SCSI Interface Manual ), data requested by the host with a read com- mand is retrieved from the buffer, if possible, before any disc access is initiated. If cache operation is not enabled, the buffer is still used, but only as circular buffer segments during disc medium read operations (disregarding Prefetch operation for the moment). That is, the drive does not check in the buffer segments for the requested read data, but goes directly to the medium to retrieve it. The retrieved data merely passes through some buffer segment on the way to the host. All data transfers to the host are in accordance with buffer-full ratio rules. See the explanation provided with the information about Mode Page 02h (disconnect/reconnect control) in the SCSI Interface Manual.

The following is a simplified description of the prefetch/cache operation: Case A—read command is received and all of the requested logical blocks are already in the cache:

1. Drive transfers the requested logical blocks to the initiator. Case B—A Read command requests data, and at least one requested logical block is not in any segment of

the cache:

1. The drive fetches the requested logical blocks from the disc and transfers them into a segment, and then from there to the host in accordance with the Mode Select Disconnect/Reconnect parameters, page 02h.

2. If the prefetch feature is enabled, refer to section 4.5.2 for operation from this point.

Cheetah 15K.5 SCSI Product Manual, Rev. F

Each cache segment is actually a self-contained circular buffer whose length is an integer number of logical blocks. The drive dynamically creates and removes segments based on the workload. The wrap-around capability of the individual segments greatly enhances the cache’s overall performance.

Note. The size of each segment is not reported by Mode Sense command page 08h, bytes 14 and 15.

The value 0XFFFF is always reported regardless of the actual size of the segment. Sending a size specification using the Mode Select command (bytes 14 and 15) does not set up a new segment size. If the STRICT bit in Mode page 00h (byte 2, bit 1) is set to one, the drive responds as it does for any attempt to change an unchangeable parameter.

4.5.1 Caching write data

Write caching is a write operation by the drive that makes use of a drive buffer storage area where the data to be written to the medium is stored while the drive performs the Write command.

If read caching is enabled (RCD=0), then data written to the medium is retained in the cache to be made available for future read cache hits. The same buffer space and segmentation is used as set up for read functions. The buffer segmentation scheme is set up or changed independently, having nothing to do with the state of RCD. When a write command is issued, if RCD=0, the cache is first checked to see if any logical blocks that are to be written are already stored in the cache from a previous read or write command. If there are, the respective cache segments are cleared. The new data is cached for subsequent Read commands.

If the number of write dat a logical blo cks excee d the size o f the segm ent b eing wr itten into, wh en th e en d of the segment is reached, the data is written i nto the b eginning of the same cache segment, overwriting the dat a that was written there at the beginning of the operation; however, the drive does not overwrite data that has not yet been written to the medium.

If write caching is enabled (WCE=1), then the drive may return Good status on a write command after the data has been transferred into the cache, but before the data has been written to the medium. If an error occurs while writing the data to the medium, and Good status has already been returned, a deferred error will be generated.

The Synchronize Ca che command may be used to force the drive to write all cached wri te dat a to the med ium. Upon completion of a Synchronize Cache command, all data received from previous write commands will have been written to the medium.

Tables 10, 11 and 12 show the mode default settings for the drive.

4.5.2 Prefetch operation

If the Prefetch feature is enabled, data in contiguous logical blocks on the disc immediately beyond that which was requested by a Read command are retrieved and stored in the buffer for immediate transfer from the buffer to the host on subsequent Read commands that request those logical blocks (this is true even if cache operation is disabled). Though the prefetch operation uses the buffer as a cache, finding the requested data in the buffer is a prefetch hit, not a cache operation hit.

To enable Prefetch, use Mode Select page 08h, byte 12, bit 5 (Disable Read Ahead - DRA bit). DRA bit = 0 enables prefetch.

The drive does not use the Max Prefetch field (bytes 8 and 9) or the Prefetch Ceiling field (bytes 10 and 11). When prefetch (read look-ahead) is enabled (enabled by DRA = 0), the drive enables prefetch of contiguous

blocks from the disc when it senses that a prefetch hit will likely occur. The drive disables prefetch when it decides that a prefetch hit is not likely to occur.

Cheetah 15K.5 SCSI Product Manual, Rev. F

5.0 Reliability specifications

The following reliability specifications assume correct host/drive operational interface, including all interface timings, power supply voltages, environmental requirements and drive mounting constraints (see Section 8.4).

Seek Errors Read Error Rates [1]

Recovered Data Unrecovered Data Miscorrected Data Annualized Failure Rate (AFR) 0.62%

Preventive Maintenance None required

Note.

[1] Error rate specified with automatic retries and data correction with ECC enabled and all flaws reallocated.

5.1 Error rates

The error rates stated in this specification assume the following:

• The drive is operated per this specification using DC power as defined in this manual (see Section 6.2).

• Errors caused by host system failures are excluded from error rate computations.

• Assume random data.

• Default OEM error recovery settings are applied. This includes AWRE, ARRE, full read retries, full write

retries and full retry time.

Less than 10 in 108 seeks

Less than 10 errors in 1012 bits transferred (OEM default settings) Less than 1 sector in 1016 bits transferred (OEM default settings) Less than 1 sector in 1021 bits transferred

5.1.1 Recoverable Errors

Recoverable errors are those detected and corrected by the drive, and do not require user intervention. Recoverable Data errors will use correction, although ECC o n-the-fly is not considered fo r purposes o f recov-

ered error specifications. Recovered Data error rate is determined using read bits transferred for recoverable errors occurring during a

read, and using write bits transferred for recoverable errors occurring during a write.

5.1.2 Unrecoverable Error

Unrecoverable Data Errors (Sense Key = 03h) are specified at less than 1 sector in error per 1016 bits transferred. Unrecoverable Data Errors resulting from the same cause are treated as 1 error for that block.

Cheetah 15K.5 SCSI Product Manual, Rev. F

5.1.3 Seek errors

A seek error is defined as a failure of the drive to position the heads to the addressed track. After detecting an initial seek error, the drive automaticall y perf orms an error recovery process. If the error recover y process fails, a seek positioning error (Error code = 15h or 02h) will be reported with a Hardware error (04h) in the Sense Key. Recoverable seek errors are specified at Less than 10 errors in 108 seeks. Unrecoverable seek errors (Sense Key = 04h) are classified as drive failures.

5.2 Reliability and service

You can enhance the reliability of Cheetah 15K.5 SCSI disc drives by ensuring that the drive receives adequate cooling. Section 6.0 provides temperature measurements and other information that may be used to enhance the service life of the drive. Section 8.3 provides recommended air-flow information.

5.2.1 Annualized Failure Rate (AFR) and Mean Time Between Failures (MTBF)

These drives shal l ach ieve an A FR of 0.62 % ( MTBF of 1,400,000 hours) w he n op erate d in an en vi ronm ent that ensures the HDA case temperatures do not exceed the values specified in Section 6.4.1.

Operation at case temperatures outside the specifications in Section 6.4.1 may increase the AFR (decrease the MTBF). AFR and MTBF statistics are population statistics that are not relevant to individual units.

AFR and MTBF specifications are based on the following assumptions for Enterprise Storage System environments:

• 8,760 power-on hours per year

• 250 average on/off cycles per year

• Operating at nominal voltages

• System provides adequate cooling to ensure the case temperatures specified in Section 6.4.1 are not exceeded.

5.2.2 Preventive mainte nan ce

No routine scheduled preventive maintenance shall be required.

Cheetah 15K.5 SCSI Product Manual, Rev. F

5.2.3 Hot plugging Cheetah 15K.5 SCSI disc drives

The ANSI SPI-4 document defines the physical requirements for removal and insertion of SCSI devices on the SCSI bus. Four cases are addressed. The cases are differentiated by the state of the SCSI bus when the removal or insertion occurs.

Case 1 - All bus devices powered off during removal or insertion Case 2 - RST signal asserted continuously during removal or insertion Case 3 - Current I/O processes not allowed during insertion or removal Case 4 - Current I/O process allowed during insertion or removal, except on the device being changed Seagate Cheetah 15K.5 SCSI disc drives support all four hot plugging cases. Provision shall be made by the

system such that a device being inserted makes power and ground connections prior to the connection of any device signal contact to the bus. A device being removed shall maintain power and ground connections after the disconnection of an y device si gnal co nt act fr om t he bu s (see S FF- 8451 Specification fo r S CA- 2 Unsh iel ded Connections).

It is the responsibility of the systems integrator to assure that no hazards from temperature, energy, voltage, or ESD potential are presented during the hot connect/disconnect operation.

All I/O processes for the SCSI device being inserted or removed shall be quiescent. All SCSI devices on the bus shall have receivers that conform to the SPI-4 standard.

If the device being h ot plug ged use s single-e nded (S E) dri ver s and th e bus is cu rrently operating in lo w volt age differential (LVD) mode, then all I/O processes for all devices on the bus must be completed, and the bus quiesced, before attempting to hot plug. Following the insertion of the newly installed device, the SCSI host adapter must issue a Bus Reset, followed by a synchronous transfer negotiation. Failure to perform the SCSI Bus Reset could result in erroneous bus operations.

The SCSI bus termination and termination power source shall be external to the device being inserted or removed.

End users should not mix devices with high voltage differential (HVD) drivers and receivers and devices with SE, LVD, or multimode drivers and receivers on the same SCSI bus since the common mode voltages in the HVD environment may not be controlled to safe levels for SE and LVD devices (see ANSI SPI-4).

The disc drive spindle must come to a complete stop prior to completely removing the drive from the cabinet chassis. Use of the Stop Spindle command or partial withdrawal of the drive, enough to be disconnected from the power source, prior to re moval ar e meth ods for insu ri ng tha t this requi rement is met. During drive inser tion, care should be t aken to avo id excee ding th e l imit s st ate d in S ection 6.4. 4, "S hock and vibration" in this manual.

5.2.4 S.M.A.R.T.

S.M.A.R.T. is an acronym for Self-Monitoring Analysis and Reporting Technology. This technology is intended to recognize conditions that indicat e drive degr adati o n and is designed to pro v ide suf fic ient warn ing of a fai lure to allow data back-up before an actual failure occurs.

Note. The firmware will monitor specific attributes for degradation over time but cannot predict instanta-

neous drive failures.

Each attribute monitors a specific set of conditions in the operating performance of the drive, and the thresholds are optimized to minimize “false” predictions.

Cheetah 15K.5 SCSI Product Manual, Rev. F

Controlling S.M.A.R.T.

The operating mode of S.M.A.R.T. is controlled by the DEXCPT bit and the PERF bit of the “Informational Exceptions Control Mode Page” (1Ch). The DEXCPT bit is used to enable or disable the S.M.A.R.T. process. Setting the DEXCPT bit will disable all S.M.A.R.T. functions. When enabled, S.M.A.R.T. will collect on-line data as the drive performs normal read/write operations. When the PERF bit is set, the drive is considered to be in “On-line Mode Only” and will not perform off-line functions.

The process of me asurin g of f- lin e attri butes and sa ving da ta can b e for ced b y the Re zero Uni t com mand. For c ing S.M.A.R.T. will reset the timer so that the next scheduled interrupt will be two hours.

The drive can be interroga ted by the host to dete rmine the time remaining befor e the next sche duled m easur e ment and data logging process will occur. This is accomplished by a log sense command to log page 0x3E. The purpose is to allow the customer to control when S.M.A.R.T. interruptions occur. As described above, forcing S.M.A.R.T by the Rezero Unit command will reset the timer.

Performance impact

S.M.A.R.T. attribute data will be saved to the disc for the purpose of re creating the events that ca used a pr edictive failure. The drive will measure and save parameters once every two hours subject to an idle period on the SCSI bus. The process of measuring off-line attribute data and saving data to the disc is uninterruptable and the maximum delay is summarized below::

Maximum processing delay

S.M.A.R.T. delay times

On-line only delay DEXCPT = 0, PERF = 1

42 milliseconds

Fully-enabled delay DEXCP T = 0, PE R F = 0

163 milliseconds

Reporting control

Reporting is controlled in the Informational Exceptions Control Page (1Ch). Subject to the reporting method, the firmware will issue a 01-5D00 sense code to the host. The error code is preserved through bus resets and power cycles.

Determining rate

S.M.A.R.T. monitors the rate at which errors occur and signals a predictive failure if the rate of degraded error rate increases to an unacceptable level. To determine rate, error events are logged and compared to the number of total operations for a given attribute. The interval defines the number of operations over which to measure the rate. The counter that keeps track of the current number of operations is referred to as the Interval Counter.

S.M.A.R.T. measures error rate, hence for each attribute the occurrence of an error is recorded. A counter keeps track of the number of errors for the current interval. This counter is referred to as the Failure Counter.

Error rate is simply the number of errors per operation. The algorithm that S.M.A.R.T. uses to record rates of error is to set thresholds for the number of errors and the interval. If the number of errors exceeds the thre shold before the interval expires, then the error rate is considered to be unacceptable. If the number of errors does not exceed the threshold before the interval expires, then the error rate is considered to be acceptable. In either case, the interval and failure counters are reset and the process starts over.

Predictive failures

S.M.A.R.T. signals predictive failures when the drive is performing unacceptably for a period of time. The firmware keeps a running count of the number of times the error rate for each attribute is unacceptable. To accomplish this, a counter is incremented whenever the error rate is unacceptable and decremented (not to exceed

Cheetah 15K.5 SCSI Product Manual, Rev. F

zero) whenever the error rate is acceptable. This counter is referred to as the Failure History Counter. There is a separate Failure History Counter for each attribute. Should the counter continually be incremented such that it reaches the predictive threshold, a predictive failure is signaled.

5.2.5 Thermal monitor

Cheetah 15K.5 SCSI drives implement a temperature warning system which:

1. Signals the host if the temperature exceeds a value which would threaten the drive.

2. Signals the host if the temperature exceeds a user-specified value.

3. Saves a S.M.A.R.T. data frame on the drive which exceed the threatening temperature value. A temperature sensor monitors the drive temperature and issues a warning over the interface when the tem-

perature exceeds a set threshold. The temperature is measured at power-up and then at ten-minute intervals after power-up.

The thermal monitor system generates a warning code of 01-0B01 when the temperature exceeds the specified limit in compliance with the SCSI standard. The drive temperature is reported in the FRU code field of mode sense dat a. You can use this infor matio n to deter mine if the warning i s due to t he tem per atur e excee ding the drive threatening temperature or the user-specified temperature.

This feature is controlled by the En able W a rni ng (EWasc) bit, and the reporting mechanism is controlled by the Method of Reporting Informational Exceptions field (MRIE) on the Informational Exceptions Control (IEC) mode page (1Ch).

The current algorithm implements two temperature trip points. The first trip point is set at 68°C which is the maximum temperature limit according to the drive specification. The second trip point is user-selectable using the Log Select command. The re feren ce tempe ratur e p aram eter in the tempera ture log page (see Table 2) can be used to set this trip point. The default value for this drive is 68°C, however, you can set it to any value in the range of 0 to 68°C. If you specify a temperature greater than 68°C in this field, the temperature is rounded down to 68°C. A sense code is sent to the host to indicate the rounding of the parameter field.

Table 2: Temperature Log page (0Dh)

Parameter Code Description

0000h 0001h

Primary Temperature Reference Temperature

When the first tem perature trip point is exceeded , S. M.A .R.T. data is collected and a fram e is save d to th e disc.

5.2.6 Drive Self Test (DST)

Drive Self Test (DST) is a technology designed to recognize drive fault conditions that qualify the drive as a failed unit. DST validates the functionality of the drive at a system level.

There are two test coverage options implemented in DST:

1. Extended test

2. Short text The most thorough option is the extended test that performs various tests on the drive and scans every logical

block address (LBA) of the drive. The short test is time-restricted and limited in length—it does not scan the entire media surface, but does some fundamental tests and scans portions of the media.

If DST encounters an error during either of these tests, it reports a fault condition. If the drive fails the test, remove it from service and return it to Seagate for service.

Cheetah 15K.5 SCSI Product Manual, Rev. F

5.2.6.1 DST Failure Definition

The drive will present a “diagnostic failed” condition through the self-tests results value of the diagnostic log page if a functional failure is encountered during DST. The channel and servo parameters are not modified to test the drive more stringently, and the number of retries are not reduced. All retries and recovery processes are enabled during the test. If data is recoverable, no fa ilure condition will be reported regardless of the number of retries required to recover the data.

The following conditions are considered DST failure conditions:

• Seek error after retries are exhausted

• Track-follow error after retries are exhausted

• Read error after retries are exhausted

• Write error after retries are exhausted

Recovered errors will not be reported as diagnostic failures.

5.2.6.2 Implementation

This section provides all of the information necessary to implement the DST function on this drive.

5.2.6.2.1 State of the drive prior to testing

The drive must be in a ready state before issuing the Send Diagnostic command. There are multiple reasons why a drive may not be ready, some of which are valid conditio ns, and not erro rs. For example, a drive may be in process of doing a form at, or anothe r D ST. It is the responsibility o f the ho st applic atio n to det erm ine the “ not ready” cause.

While not technically part of DST, a Not Ready condition also qualifies the drive to be returned to Seagate as a failed drive.

A Drive Not Ready condition is reported by the drive under the following conditions:

• Motor will not spin

• Motor will not lock to speed

• Servo will not lock on track

• Drive cannot read configuration tables from the disc

In these conditions, the drive responds to a Test Unit Ready command with an 02/04/00 or 02/04/03 code.

5.2.6.2.2 Invoking DST

To invoke DST, submit the Send Diagnostic command with the appropriate Function Code (001b for the short test or 010b fo r t he e xtende d test) in bytes 1, bit s 5, 6, and 7. Refer to th e S CSI Com mand s Refe rence Ma nual, part number 100293068, for additional information about invoking DST.

5.2.6.2.3 Short and extended tests

DST has two testing options:

1. short

2. extended

These testing options are described in the following two subsections. Each test consists of three segments: an electrical test segment, a servo test segment, and a read/verify scan

segment.

Cheetah 15K.5 SCSI Product Manual, Rev. F

Short test (Function Code: 001b)

The purpose of the short test is to provide a time-limited test that tests as much of the drive as possible within 120 seconds. The short test does not scan the entire media surface, but does some fundamental tests and scans portions of the media. A complete rea d/ver ify scan is not per formed and onl y factua l failu res will report a fault condition. This option provides a quick confidence test of the drive.

Extended test (Function Code: 010b)

The objective of the extended test option is to empirically test critical drive components. For example, the seek tests and on-track operations test the positioning mechanism. The read operation tests the read head element and the media surface. The write element is tested through read/write/read operations. The integrity of the media is checked through a read/verify scan of the media. Motor functionality is tested by default as a part of these tests.

The anticipated length of the Extended test is reported through the Control Mode page.

5.2.6.2.4 Log page entries

When the drive begins DST, it creates a new entry in the Self-test Results Log page. The new entry is created by inserting a new self-te st parameter block a t the beginning of t he se lf-test results log p a ram eter section of the log page. Existing data will be moved to make room for the new parameter block. The drive reports 20 parameter blocks in the log p ag e. If th ere are more than 20 p ar amet er blocks, the least r ecent p a rame ter block will be deleted. The new parameter block will be initialized as follows:

1. The Function Code field is set to the same value as sent in the DST command

2. The Self-Test Results Value field is set to Fh

3. The drive will store the log page to non-volatile memory After a self-test is complete or has been aborted, the drive updates the Self-Test Results Value field in its Self-

Test Results Log page in non-volatile memory. The host may use Log Sense to read the results from up to the last 20 self-tests performed by the drive. The self-test results value is a 4-bit field that reports the results of the test. If the field is zero, the drive passed with no errors detected by the DST. If the field is not zero, the test failed for the reason reported in the field.

The drive will report the failure condition and LBA (if applicable) in the Self-test Results Log parameter. The Sense key, ASC, ASCQ, and FRU are used to report the failure condition.

5.2.6.2.5 Abort

There are several ways to abort a diagnostic. You can use a SCSI Bus Reset or a Bus Device Reset message to abort the diagnostic.

You can abort a DST executing in background mode by using the abort code in the DST Function Code field. This will cause a 01 (self-test aborted by the application client) code to appear in the self-test results values log. All other abort mechanisms will be reported as a 02 (self-test routine was interrupted by a reset condition).

5.2.7 Product warranty

Beginning on the date of shipment to custome r and continuing for a period of five years, Seagate warr ant s that each product (includ ing compo nent s and sub assemb l ies) or sp ar e pa rt that fails to fun cti on pro perly un der normal use due to defect in materials on workmanship or due to nonconformance to the applicable specifications will be repaired or replaced, at Seagate’s option and at no charge to customer, if returned by customer at customer’s expense to Seagate’s designated facility in accordance with Seagate’s warranty procedure. Seagate will pay for transporting the repair or replacement item to customer. For more detailed warranty information refer to the Standard terms and conditions of Purchase for Seagate products.

Cheetah 15K.5 SCSI Product Manual, Rev. F

Shipping

When transporting or shipping a drive, a Seagate approved container must be used. Keep your original box. They are easily identified by the Seagate-approved package label. Shipping a drive in a non-approved container voids the drive warranty.

Seagate repair centers may refuse receipt of components improperly packaged or obviously damaged in transit. Contact your Authorized Seagate Distributor to purchase additional boxes. Seagate recommends shipping by an air-ride carrier experienced in handling computer equipment.

Product repair and return information

Seagate customer service centers are the only facilities authorized to service Seagate drives. Seagate does not sanction any third-party repair facilities. Any unauthorized repair or tampering with the factory-seal voids the warranty.

Cheetah 15K.5 SCSI Product Manual, Rev. F

6.0 Physical/electrical specifications

This section provides information relating to the physical and electrical characteristics of the Cheetah 15K.5 SCSI drive.

6.1 AC power requirements

None.

6.2 DC power requirements

The voltage and curr ent r equirements for a single dr iv e are shown in the fo llo win g t able. Values indicated apply at the drive power connector. The tables show current values in Amperes.

Table 3: ST3300655LC DC power requirements

Notes

LVD mode

Voltage +5 V +12 V Regulation [5] ±5% ±5% [2] Average idle current DC X [1][6] 0.70 0.80 Maximum starting current

(peak DC) DC (peak AC) AC

Delayed motor start (max) DC

3σ 3σ

3σ

[3] [3]

0.76

1.07

1.94

3.35

[1] [4] 0.57 0.03

Peak operating current DC Maximum DC Maximum (peak) DC

3σ 3σ

[1] [1]

0.69

0.70

1.38

1.18

1.23

2.90

Cheetah 15K.5 SCSI Product Manual, Rev. F

Table 4: ST3146855LC DC power requirements

Notes

LVD mode

Voltage +5 V +12 V Regulation [5] ±5% ±5% [2] Average idle current DC X [1][6] 0.71 0.57 Maximum starting current

(peak DC) DC (peak AC) AC

Delayed motor start (max) DC

3σ 3σ

3σ

[3] [3]

0.74

1.04

1.94

3.32

[1] [4] 0.56 0.03

Peak operating current DC Maximum DC Maximum (peak) DC

3σ 3σ

[1] [1]

0.67

0.68

1.42

0.88

0.94

2.50

Table 5: ST373455LC DC power requirements

Notes

LV D mo de

Voltage +5 V +12 V Regulation [5] ±5% ±5% [2] Average idle current DC X [1][6] 0.69 0.42 Maximum starting current

(peak DC) DC (peak AC) AC

Delayed motor start (max) DC

3σ 3σ

3σ

[3] [3]

0.72

1.00

1.94

3.32

[1] [4] 0.56 0.03

Peak operating current DC Maximum DC Maximum (peak) DC

3σ 3σ

[1] [1]

0.67

0.68

1.40

0.78

0.82

2.38

[1] Measured with average reading DC ammeter or equivalent sampling scope. Instantaneous current peaks

will exceed these values. Power supply at nominal voltage. Number of drives tested = 6, 35 Degrees C ambient.

[2] For +12 V, a –10% tolerance is permissible during initial start of spindle, and must return to ±5% before

15,000 rpm is reached. The ±5% must be maintained after the drive signifies that its power-up sequence

has been completed and that the drive is able to accept selection by the host initiator. [3] See +12 V current profile in Figure 1. [4] This condition occurs when the Motor Start Option is enabled and the drive has not yet received a Start

Motor command. [5] See Section 6.2.1 “Conducted Noise Immunity.” Specified voltage tolerance is inclusive of ripple, noise,

and transient response. [6] During idle, the drive heads are relocated every 60 seconds to a random location within the band from

three-quarters to maximum track. General Notes for Tables 3, 4, and 5:

1. Minimum current loading for each supply voltage is not less than 1.2% of the maximum operating current

shown.

2. The +5 and +12 volt supplies shall employ separate ground returns.

3. Where power is provided to multiple drives from a common supply, careful consideration for individual

drive power requirements should be noted. Where multiple units are powered on simultaneously, the peak

Cheetah 15K.5 SCSI Product Manual, Rev. F

starting current must be available to each device.

4. Parameters, other than spindle start, are measured after a 10-minute warm up.

5. No terminator power.

6.2.1 Conducted noise immunity

Noise is specified as a periodic and random distribution of frequencies covering a band from DC to 10 MHz. Maximum allowed noise values given below are peak-to-peak measurements and apply at the drive power connector.

+5 V = 250 mV pp from 0 to 100 kHz to 20 MHz.

+12 V = 800 mV pp from 100 Hz to 8 KHz.

450 mV pp from 8 KHz to 20 KHz. 250 mV pp from 20 KHz to 5 MHz.

6.2.2 Power sequencing

The drive does not require power sequencing. The drive protects against inadvertent writing during power-up and down. Daisy-chain operation requires that power be supplied to the SCSI bus terminator to ensure proper termination of the peripheral I/O cables. To automatically delay motor start based on the target ID (SCSI ID) enable the Delay M otor Start option an d di sable the E nab le Moto r Start option on the J6 connector on LW models or on the backplane for LC models. See Section 8.1 for pin selection information. To delay the motor until the drive receives a Start Unit command, enable the Enable Remote Motor Start option on the J6 connector on LW models or on the backplane for LC models.

6.2.3 Current profile

Figures 1 and 2 show +5V and +12V sample current profiles for the ST3300655LC model. All times and currents are typical. See Table 3 for maximum current requirements.

Cheetah 15K.5 SCSI Product Manual, Rev. F

Figure 1. Typical ST3300655LW drive +12V LVD current profile

Figure 2. Typical ST3300655LW drive +5 V LVD current profile

Cheetah 15K.5 SCSI Product Manual, Rev. F

6.3 Power dissipation

ST3300655LW/ST3300655LC

For drives using low voltag e di f fere ntial in terfa ce circuits, typical power dissipatio n under idle conditions is 13.1 watts (44.70 BTUs per hour).

To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure

3). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the corresponding +5 volt current, +12 volt current, and total watts on the vertical axis. To calculate BTUs per hour, multiply watts by

3.4123. )

ST3300655LC CURRE NT/POWER vs THROUGHPUT (SCSI - LVD)

Random 8 Block Reads

1.8 0 0

1.6 0 0

18.0 0

16.0 0

5Volt A 12 V o l t A Watts

1.4 0 0

1.2 0 0

1.0 0 0

0.800

Amperes

0.600

0.400

0.200

0.000

0.0 50.0 100.0 150.0 200.0 250.0 300.0 350.0 400.0

I/Os per Second

Figure 3. ST3300655LC DC current and power vs. IOPS (LVD)

14.0 0

12.0 0

10.0 0

8.00

6.00

4.00

2.00

0.00

Power (watts)

Cheetah 15K.5 SCSI Product Manual, Rev. F

ST3146855LW/ST3146855LC

For drives using low voltage differential interface circuits, typical power dissipation under idle conditions is

10.39 watts (35.45 BTUs per hour). To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure

4). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the corresponding +5 volt current, +12 volt current, and total watts on the vertical axis. To calculate BTUs per hour, multiply watts by

3.4123.

ST3146855LC CURRE NT/POWER vs THROUGHPUT (SCSI - LVD)

Random 8 Block Reads

1.8 0 0

1.6 0 0

18.0 0

16.0 0

5Volt A 12 V o l t A Watts

1.4 0 0

1.2 0 0

1.0 0 0

0.800

Amperes

0.600

0.400

0.200

0.000

0.0 50.0 100.0 150.0 200.0 250.0 300.0 350.0 400.0

I/Os per Second

Figure 4. ST3146855LC DC current and power vs. IOPS (LVD)

14.0 0

12.0 0

10.0 0

8.00

6.00

4.00

2.00

0.00

Power (watts)

Cheetah 15K.5 SCSI Product Manual, Rev. F

ST373455LW/ST373455LC

For drives using low voltag e di f fere ntial in terfa ce circuits, typical power dissipatio n under idle conditions is 8.49 watts (28.97 BTUs per hour).

To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure

5). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the corresponding +5 volt current, +12 volt current, and total watts on the vertical axis. To calculate BTUs per hour, multiply watts by

3.4123.

ST373455LC CURRENT/POWER vs THROUGHPUT (SCSI - LVD)

R an d om 8 B l o ck Reads

1.8 0 0

1.6 0 0

18 .0 0

16 .0 0

5Volt A 12 V o l t A Watts

1.4 0 0

1.2 0 0

1.0 0 0

0.800

Amperes

0.600

0.400

0.200

0.000

0.0 50.0 100.0 150.0 200.0 250.0 300.0 350.0 400.0

I/ Os per Second

Figure 5. ST373455LC DC current and power vs. IOPS (LVD)

14 .0 0

12 .0 0

10 .0 0

8.00

6.00

4.00

2.00

0.00

Power (watts)

Cheetah 15K.5 SCSI Product Manual, Rev. F

6.4 Environmental limits

Temperature and humidity values experienced by the drive must be such that condensation does not occur on any drive part. Altitude and atmospheric pressure specifications are referenced to a standard day at 58.7°F (14.8°C). Maximum wet bulb temperature is 82°F (28°C).

6.4.1 Temperature

a. Operating

The maximum allowable continuous or sustained HDA case temperature for the rated Annualized Failure Rate (AFR) is 122°F (50°C). The maximum allowable HDA case temperature is 60°C. Occasional excursions of HDA case temperatures above 122°F (50°C) or below 41°F (5°C) may occur without impact to specified AFR. Continual or sustained operation at HDA case temperatures outside these limits may degrade AFR.

Provided the HDA case temperatures limits are met, the drive meets all specifications over a 41°F to 131°F (5°C to 55°C) drive ambient temperature range with a maximum temperature gradient of 36°F (20°C) per hour . Air flow may be needed in the drive enclosu re to keep within this range (see Se ction 8.3). Operation at HDA case temperatur es out side thi s ra nge m ay adve rsely af fe ct the d rives ab ility t o mee t speci ficatio ns. To confirm that the required cooling for the electronics and HDA case is provided, place the drive in its final mechanical configuration, perform random write/read operations and measure the HDA case temperature after it has stabilized.

b. Non-operating

–40° to 158°F (–40° to 70°C) package ambient with a maximum gradient of 36°F (20°C) per hour. This specification assum es th at th e dr iv e is p ackaged in the shipping cont ain er desi gne d by Seagate for use w ith drive.

DA Temp.

heck Point

Figure 6. Locations of the HDA temperature check point

1.0"

.5"

6.4.2 Relative humidity

The values below assume that no condensation on the drive occurs. a. Operating

5% to 95% non-condensing relative humidity with a maximum gradient of 10% per hour.

b. Non-operating

5% to 95% non-condensing relative humidity with a maximum gradient of 20% per hour.

6.4.3 Effective altitude (sea level)

a. Operating

–1,000 to +10,000 feet (–305 to +3,048 meters)

Cheetah 15K.5 SCSI Product Manual, Rev. F

b. Non-operating

–1,000 to +40,000 feet (–305 to +12,210 meters)

6.4.4 Shock and vibration

Shock and vibration limits specified in this document are measured directly on the drive chassis. If the drive is installed in an enclosure to which the stated shock and/or vibration criteria is applied, resonances may occur internally to t he e nclosure resulting in drive m oveme nt i n excess of t he st at ed l im its. If t hi s situat i on is app ar ent, it may be necessary to modify the enclosure to minimize drive movement.

The limits of shock and vibration defined within this document are specified with the drive mounted by any of the four methods shown in Figure 7, and in accordance with the restrictions of Section 8.4. Orientation of the side nearest the LED may be up or down.

6.4.4.1 Shock

a. Operating—normal

The drive, as in sta lled for normal op erat ion, s hal l op erat e er ror fr ee wh ile sub je cted to in term i ttent shock not exceeding 15 Gs at a maximum duration of 11 msec (half sinewave). The drive, as installed for normal operation, shall operate error free while subjected to intermittent shock not exceeding 60 Gs at a maximum duration of 2 msec (half sinewave). Shock may be applied in the X, Y, or Z axis.

b. Operating—abnormal

Equipment, as installed for normal operation, does not incur physical damage while subjected to intermittent shock not exceeding 40 Gs at a maximum duration of 11 msec (half sinewave). Shock occurring at abnormal levels may promote degraded operational performance during the abnormal shock period. Specified operational performance will continue when normal operating shock levels resume. Shock may be applied in the X, Y, or Z axis. Shock is not to be repeated more than two times per second.

c. Non-operating

The limits of non-operating shock shall apply to all conditions of handling and transportation. This includes both isolated drives and integrated drives.

The drive subjected to nonrepetitive shock not exceeding 75 Gs at a maximum duration of 11 msec (half sinewave) shall not exhibit device damage or performance degradation. Shock may be applied in the X, Y, or Z axis.

The drive subjected to nonrepetitive shock not exceeding 250 Gs at a maximum duration of 2 msec (half sinewave) does not exhibit device damage or performance degradation. Shock may be applied in the X, Y, or Z axis.

The drive subjected to nonrepetitive shock not exceeding 120 Gs at a maximum duration of 0.5 msec (half sinewave) does not exhibit device damage or performance degradation. Shock may be applied in the X, Y, or Z axis.

d. Packaged

Disc drives shipped as loose load (not palletized) general freight will be packaged to withstand drops from heights as defined in the table below. For additional details refer to Seagate specifications 30190-001 (under 100 lbs/45 kg) or 30191-001 (over 100 lbs/45 Kg).

Package size Packaged/product weight Drop height

<600 cu in (<9,800 cu cm) Any 60 in (1524 mm) 600-1800 cu in (9,800-19,700 cu cm) 0-20 lb (0 to 9.1 kg) 48 in (1219 mm) >1800 cu in (>19,700 cu cm) 0-20 lb (0 to 9.1 kg) 42 in (1067 mm) >600 cu in (>9,800 cu cm) 20-40 lb (9.1 to 18.1 kg) 36 in (914 mm)

Cheetah 15K.5 SCSI Product Manual, Rev. F

Drives packaged in single or multipacks with a gross weight of 20 pounds (8.95 kg) or less by Seagate for general freight shipment shall withstand a drop test from 48 inches (1,070 mm) against a concrete floor or equivalent.

Figure 7. Recommended mounting

Cheetah 15K.5 SCSI Product Manual, Rev. F

6.4.4.2 Vibration

a. Operating—normal

The drive as installed for normal operation, shall comply with the complete specified performance while subjected to continuous vibration not exceeding

10–500 Hz @ 0.5 G (zero to peak) Vibration may be applied in the X, Y, or Z axis. Operating normal translational random flat profile:

10–500 Hz 0.4 gRMS

b. Operating—abnormal

Equipment as installed for normal operation shall not incur physical damage while subjected to periodic vibration not exceeding:

15 minutes of duration at major resonant frequency

10–500 Hz @ 0.75 G (X, Y, or Z axis, zero to peak) Vibration occurring at these levels may degrade operational performance during the abnormal vibration

period. Specified operational performance will continue when normal operating vibration levels are resumed.

Operating abnormal translational random flat profile

10 - 500 Hz 1.2 gRMS

c. Non-operating

The limits of non-operating vibration shall apply to all conditions of handling and transportation. This includes both isolated drives and integrated drives.

The drive shall not incur physical damage or degraded performance as a result of continuous vibration not exceeding

5–22 Hz @ 0.040 inches (1.02 mm) displacement (zero to peak)

22–500 Hz @ 2.00 G (zero to peak) Vibration may be applied in the X, Y, or Z axis. Non-operating translational random flat profile:

10–500 Hz 1.2 gRMS

6.4.5 Air cleanliness

The drive is designed to operate in a typical office environment with minimal environmental control.

6.4.6 Corrosive environment

Seagate electronic drive components pass accelerated corrosion testing equivalent to 10 years exposure to light industrial environments containing sulfurous gases, chlorine and nitric oxide, classes G and H per ASTM B845. However, this accelerated testing cannot duplicate every potential application environment.

Users should use caution exposing any electronic components to uncontrolled chemical pollutants and corrosive chemicals as electr onic dr i ve com ponen t reliab ilit y can be af fecte d by th e i nst allation environment. Th e si l- ver, copper, nickel and gold films used in Seagate products are especially sensitive to the presence of sulfide, chloride, and nitr ate c ont ami na nt s. S ulfur is found to be the m ost dam aging . In ad di tion, e lectron i c comp onent s should never be exposed to condensing water on the surface of the printed circuit board assembly (PCBA) or exposed to an am bient rel at ive hum idity gr eate r th an 9 5%. Mat erial s used in cabin et fa bri cation , such as vulcanized rubber, that can outgas corrosive compounds should be minimized or eliminated. The useful life of any electronic equipment may be extended by replacing materials near circuitry with sulfide-free alternatives.

Cheetah 15K.5 SCSI Product Manual, Rev. F

6.4.7 Acoustics

Sound power during idle mode shall be 3.7 bels typical when measured to ISO 7779 specification. Sound power while operating shall be 4.3 bels typical when measured to ISO 7779 specification.

There will not be any discrete tones more than 10 dB above the masking noise on typical drives when measured according to Seagate specification 30553-001. There will not be any tones more than 24 dB above the masking noise on any drive.

6.4.8 Electromagn etic susc ept ibili ty

See Section 2.1.2.

6.5 Mechanical specifications

The following nominal dimensions are exclusive of the decorative front panel accessory. However, dimensions of the front panel are shown in figure below. Refer to Figures 8 and 9 for detailed mounting configuration dimensions. See Section 8.4, “Drive mounting.”

Height (max): 1.028 in. 26.11 mm Width (max): 4.010 in. 101.85 mm Depth (max): 5.787 in. 146.99 mm Weight (max): 1.85 pounds 0.839 kilograms

REF

-Z-T// [1]

-Z-

R REF

-ZM

-X-U

[1]

-X-

Notes:

[1]

Mounting holes are 6-32 UNC 2B, three on each side and four on the bottom. Max screw penetration into side of drive is 0.15 in. (3.81 mm). Max screw tightening torque is 6.0 in-lb (3.32 nm) with minimum full thread engagement of

0.12 in. (3.05 mm).

B C D E F H

J K L M P R S T U V

Figure 8. LW mounting configuration dimensions

Dimension Table

Inches

1.028

max

5.787

max

4.000

± .010

3.750

± .010

.125

± .010

1.750

± .010

1.122

± .020

4.000

± .010

.250

± .010

1.638

± .010

.181

± .020

1.625

± .020

1.816 .315 .015

max

.015

max

.265

± .010

Millimeters

26.10

147.00

101.60

95.25

3.18

44.45

28.50

101.60

6.35

41.60

4.60

41.28

46.13

8.00

0.38

6.73

max max ± .25

± .25

± .25 ± .50 ± .25 ± .25 ± .25 ± .50 ± .50

max max ± .25

Cheetah 15K.5 SCSI Product Manual, Rev. F

-X-U

-Z-

REF

-Z-T//

[1]

R REF

-Z- -X-N

-X-

Notes:

[1]

0.12 in. (3.05 mm).

1.028

5.787

4.000

3.750

.125

1.750

1.122

4.000

.250

1.638

.181

.040

1.625

2.618

.276

.015

-Z-

Dimension Table

Inches

max max ± .010 ± .010 ± .010 ± .010 ± .020 ± .010 ± .010 ± .010

± .020

max max

26.10

147.00

101.60

95.25

44.45

28.50

101.60

41.60

41.28

66.50

Millimeters

max max ± .25

± .25

3.18 ± .25 ± .50 ± .25 ± .25

6.35 ± .25

4.60

1.02 ± .50

7.00 max

0.38 max

0.38

Figure 9. LC mounting configuration dimensions

Cheetah 15K.5 SCSI Product Manual, Rev. F

7.0 Defect and error management

Seagate continues to use innovative technologies to manage defects and errors. These technologies are designed to increase data integrity, perform drive self-maintenance, and validate proper drive operation.

SCSI defect and error management involves drive internal defect/error management and SCSI system error considerations (errors in communications between the initiator and the drive). In addition, Seagate provides the following technologies used to increase data integrity and drive reliability:

• Background Media Scan (see Section 7.4)

• Media Pre-Scan (see Section 7.5)

• Deferred Auto-Reallocation (see Section 7.6)

• Idle Read After Write (see Section 7.7) The read error rates and specified storage capacities are not dependent on host (initiator) defect management

routines.

7.1 Drive in ternal defects

During the initial drive format operation at the factory, media defects are identified, tagged as being unusable, and their locations recorded on the drive primary defects list (referred to as the “P” list and also as the ETF defect list). At factory format time, these known defects are also reallocated, that is, reassigned to a new place on the medium and the location listed in the defects reallocation table. The “P” list is not altered after factory formatting. Locations of defects found and reallocated during error recovery procedures after drive shipment are listed in the “G” list (defects growth list). The “P” and “G” lists may be referenced by the initiator using the Read Defect Data command (see the SCSI Commands Reference Manual).

7.2 Drive error recov ery procedures

Whenever an error occurs during drive operation, the drive, if programmed to do so, performs error recovery procedures to attempt to recover the data. The error recovery procedures used depend on the options previously set up in the error recovery parameters mode page. Error recovery and defect management may involve the use of several SCSI commands, the details of which are described in the SCSI Interface Product Manual. The drive implement s select able err or reco very ti me limit s such as are require d in video applicati ons. For additional information on this, refer to the Error Recovery Page table in the SCSI Commands Reference Manual, which describes the Mode Select/Mode Sense Error Recovery parameters.

The error recovery scheme supported by the drive provides a means to control the total error recovery time for the entire command in ad dition to co ntrolling the reco very level fo r a single LBA . The to ta l am ount of t ime sp ent in error recovery for a command can be limited via the Recovery Time Limit bytes in the Error Recovery Mode Page. The total amount of time spent in error recovery for a single LBA can be limited via the Read Retry Count or Write Retry Count bytes in the Error Recovery Mode Page.

The drive firmware error recovery algorithms consist of 11 levels for read recoveries and 5 levels for writes.

Cheetah 15K.5 SCSI Product Manual, Rev. F

Table 6 equates the Read and Write Retry Count with the maximum possible recovery time for read and write recovery of individual LBAs. The times given do not include time taken to perform reallocations, if reallocations are performed. Reallocations are performed when the ARRE bit (for reads) or AWRE bit (for writes) is one, the RC bit is zero, and the Recovery Time Limit for the command has not yet been met. Time needed to perform reallocation is not counted against the Recovery Time Limit.

The Read Continuous (RC) bit, when set to one, requests the disc drive to transfer the requested data length without adding delays (for retries or ECC correction) that may be required to insure data integrity. The disc drive may send erroneous data in order to maintain the continuous flow of data. The RC bit should only be used when data integrity is not a concern and speed is of utmost importance. If the Recovery Time Limit or retry count is reached during error recovery, the state of the RC bit is examined. If the RC bit is set, the drive will transfer the unrecovered data with no error indication and continue to execute the remaining command. If the RC bit is not set, the drive will stop data transfer with the last good LBA, and report a “Check Condition, Unrecovered Read Error.”

Table 6: Read and write retry count maximum recovery times [1]

Read retry count

[1]

0 51.87 0 23.94 1 59.85 1 35.91 2 203.49 2 55.86 3 219.45 3 67.83 4 253.11 4 119.79 5 279.35 5 (default) 147.72 6 311.27 7 395.12 8 463.12 9 495.04 10 530.95 11 (default) 1,282.97

Maximum recovery time per LBA (cumulative, msec)

Write retry count

Maximum recovery time per LBA (cumulative, msec)

[1] These values are subject to change.

Setting these retry counts to a value below the default setting could result in an increased unrecovered error rate which may exceed the value given in this product manual. A setting of zero (0) will result in the drive not performing error recovery.

For example, suppose the Read/Write Recovery page has the RC bit set to 0, read retry count set to 4, and the recovery time limit field (Mode Sense page 01, bytes 10 and 11) set to FF FF hex (maximum). A four LBA Read command is allowed to take up to 253.11 msec recovery time for each of the four LBAs in the command. If the recovery time limit is set to 00 C8 hex (200 msec decimal) a four LB A read comm and is allowed to take up to 200 msec for all error recovery within that command. The use of the Recovery Time Limit field allows finer granularity on control of the time spent in error recovery. The recovery time limit only starts counting when the drive is executing error recovery and it restarts on each command. Therefore, each command’s total recovery time is subject to the recovery time limi t. Note: A recovery time limit of 0 will use the drive’s default value of FF FF. Minimum recovery time limit is achieved by setting the Recovery Time Limit field to 00 01.

Cheetah 15K.5 SCSI Product Manual, Rev. F

7.3 SCSI system s errors

Information on the reporting of operational errors or faults across the interface is given in the SCSI Interface Product Manual. Message Protocol System is described in the SCSI Interface Product Manual. Several of the

messages are used in the SCSI systems error management system. The Request Sense command returns information to the host about numerous kinds of errors or faults. The Receive Diagnostic Results reports the results of diagnostic operations performed by the drive.

Status returned by the drive to the Initiator is described in the SCSI Commands Reference Manual. Status reporting plays a role in the SCSI systems error management and its use in that respect is described in sections where the various commands are discussed.

7.4 Background Media Scan

Background Media Scan (BMS) is a self-initiated media scan. BMS is defined in the T10 document SPC-4 available from the T10 committee. BMS performs sequential reads across the entire pack of the media while the drive is idle. In RAID arrays, BMS allows hot spare drives to be scanned for defects prior to being put into service by the host system. On regular duty drives, if the host system makes use of the BMS Log Page, it can avoid placing data in suspect locations on the media. Unreadable and recovered error sites will be logged or reallocated per ARRE/AWRE settings.

With BMS, the host system can consume less power and system overhead by only checking BMS status and results rather th an tyi ng up th e bus a nd consu ming p ower i n the pr ocess o f host- initiated medi a scanning activ ity.

Since the backgr ound scan function s ar e o nl y don e d uring i dle p eriod s, B MS cau ses a neg lig ibl e imp a ct to sys tem performance. The first BMS scan for a newly manufactured drive is performed as quickly as possible to verify the media and protect data by setting the “Start time after idle” to 5ms, all subsequent scans begin after 500ms of idle time. Other features that normally use idle time to function will functio n normally because BMS functions for bursts of 800ms and then suspends activity for 100ms to allow other background functions to operate.

BMS interrupts immedi ately to service host com man ds from the inter face bus whi le pe rfor ming r eads. B MS will complete any BMS-initiated error recovery prior to returning to service host-initiated commands. Overhead associated with a return to host-servicing activity from BMS only impacts the first command that interrupted BMS, this results in a typical delay of about 1 ms.

7.5 Media Pr e- Scan

Media Pre-Scan is a feature that allows the drive to repair media errors that would otherwise have been found by the host system during critical data accesses early in the drive’s life. The default setting for Media Pre-Scan is enabled on standard products. Media Pre-Scan checks each write command to determine if the destination LBAs have been scanned by BMS. If the LBAs have been verified, the drive proceeds with the normal write command. If the LBAs have not been verified by BMS, Pre-Scan will convert the write to a write verify to certify that the data was properly written to the disc.

Note. During Pre-Scan write verify commands, write performance may decrease by 50% until Pre-Scan

completes. Write performance testing should be performed after Pre-Scan is complete. This may be checked by reading the BMS status.

To expedite the scan of the full pack and subsequently exit from the Pre-Scan period, BMS will begin scanning immediately when the drive goes to idle during the Pre-Scan period. In the event that the drive is in a high transaction traffic environment and is unable to complete a BMS scan within 24 power on hours BMS will disable Pre-Scan to restore full performance to the system.

Cheetah 15K.5 SCSI Product Manual, Rev. F

7.6 Deferred Auto-Reallocation

Deferred Auto-Reallocation (DAR) simplifies reallocation algorithm s at the system leve l by allowing the drive to reallocate unreadable locations on a subsequent write command. Sites are marked for DAR during read operations performed by the drive. When a write command is received for an LBA marked for DAR, the auto-reallocation process is invoked and attempts to rewrite the data to the original location. If a verification of this rewrite fails, the sector is re-mapped to a spare location.

This is in contrast to the system having to use the Reassign Command to reassign a location that was unreadable and then generate a write command to rewrite the data. DAR is most effective when AWRE and ARRE are enabled—this is the default setting from the Seagate factory. With AWRE and ARRE disabled DAR is unable to reallocate the failing location and will report an error sense code indicating that a write command is being attempted to a previously failing location.

7.7 Idle Read After Write

Idle Read After Write (IRAW) utilizes idle time to verify the integrity of recently written data. During idle periods, no active system requests, the drive reads recently written data from the media and compares it to valid write command data resident in the drives data buffer. Any sectors that fail the comparison result in the invocation of a rewrite and auto-reallocation process. The process attempts to rewrite the data to the original location. If a verification of this rewrite fails, the sector is re-mapped to a spare location.

Cheetah 15K.5 SCSI Product Manual, Rev. F

8.0 Installation

Note. These drives are designed to be used only on single-ended (SE) or low voltage differential (LVD)

busses. Do not install these drives on a high voltage differential (HVD) bus.

The first thing to do when installing a drive is to set t he drive S CSI ID an d set up ce rt ain ope rating option s. This is usually done by instal ling sma ll sho rting jum pers on the J5 conne ctor (se e Fi gur e 10), or via the dr ive to host I/O signals on the LC model. Some users connect cables to J5 and perform the set-up using remote switches.

Configure drive options

For option jumper locations and definitions refer to Figures 10 and 11. Drive default mode parameters are not normally needed for installati on. Refer to Section 9.3.2 for default mode parameters if they are needed.

• Ensure that the SCSI ID of the drive is not the same as the host adapter. Most host adapters use SCSI ID 7 because ID 7 is the highest priority on both 8 and 16 bit data buses.

• If multiple devices are on the bus set the drive SCSI ID to one that is not presently used by other devices on the bus.

• If the drive is the only device on t he b us, at ta ch it to th e en d of the SCSI b us cab le. T he user, system integrator, or host equipment manufacturer must provide external terminators.

Note. For additional information about terminator requirements, refer to Sections 9.8 and 9.9.

• Set all appropriate option jumpers for desired operation prior to power on. If jumpers are changed after power has been applied, recycle the drive power to make the new settings effective.

• Installation instructions are provided by host system documentation or with any additionally purchased drive installation software. If necessary see Section 10 for Seagate support services telephone numbers.

• Do not remove the manufacturer’s installed labels from the drive and do not cover with additional labels, as the manufacturer labels contain information required when servicing the product.

Formatting

• Drives are shipped from the factory low level formatted with 512 byte sectors.

8.1 Drive ID/ op t io n select header

Figure 10 shows the drive ID select jumper connector. Figure 11 shows the option select jumper connector for all models. Figure 11 shows the drive’s J6 jumper connector. The notes following the figures describ e the functions of the various jumper positions on the connectors. Suggested part number for the jumpers used on J6 is Molex 52747-0211 (Seagate part number 77679052). A bag with the two jumper plug types is shipped with the standard OEM drives.

Cheetah 15K.5 SCSI Product Manual, Rev. F

)

Drive HDA (rear view, PCB facing downward)

68 Pin

SCSI I/O Connector

[4]

Pin 1

+5V Ground

Pin 1

[2]

SCSI ID = 0 (default) SCSI ID = 1

SCSI ID = 2 SCSI ID = 3 SCSI ID = 4 SCSI ID = 5 SCSI ID = 6 SCSI ID = 7

SCSI ID = 8 SCSI ID = 9

SCSI ID = 10 SCSI ID = 11 SCSI ID = 12 SCSI ID = 13 SCSI ID = 14 SCSI ID = 15

A3A2A

1197531

Host Alternate Usage Plug

Reserved

N.C.

[4]

12 10 8 6 4 2

+5V

Dashed area is optional host circuitry (external to the drive) connected to host supplied optional usage plug.

N.C.

Ground

Drive Activity LED

A0A1A2A

[1] [2]

1P2P3P4P

J1-DC Power

PCB

For ID selection use jumpers as shown or connect a cable for remote switching as shown below.

Pins 1, 3, 5, and 7 are optional connections to switching circuits in host equipment to establish drive ID.

Remote Switches

Pins 2, 4, 6, and 8 are normally not grounded. They are driven low (ground for 250 ms after a Reset or PWR ON to allow drive to read SCSI ID selected.

Figure 10. J5 jumper header (on LW models only)

Cheetah 15K.5 SCSI Product Manual, Rev. F

Drive Front

Jumper Plug

(enlarged to show detail)

Term. Power to SCSI Bus

Force Single-ended Bus Mode

Delay Motor Start

Enable Remote Motor Start

Write Protect

Parity Disable

Reserved

[1] [5]

SEDSMEWPP

T P

Pin 1

Figure 11. J6 option select header (on LW models only)

8.1.1 Notes for Figures 10 and 11.

[1] Notes explaining the functions of the various jumpers on J5 and J6 jumper header connectors are given

here and in Section 8.1.2. The term “default” means as standard OEM units are configured with a jumper on those positions when shipped from factory. “Off” means no jumper is installed; “On” means a jumper is installed. OFF or ON underlined is factory default condition.

The PCBA on LC models does not have connector J5 or J6. The J5 connector signals conform to SFF-

8009 Revision 2.0, Unitized Connector for Cabled Drives, signal assignments for auxiliary connectors. [2] These signals are also on 80-pin J1 I/O connector. See tables 19 and 20, note 9. [3] Voltage supplied by the drive. [4] Dashed area is optional host circuitry (external to the drive) connected to host supplied optional usage

plug. [5] Do not connect anything to J5 pins 9, 11-12 or J6 pins 13-20. [6] Connect an external Drive Activity LED to J5 pin 8 (see Figure 10) and the drive’s +5V power source,

through an appropriately sized current limiting resistor.

Cheetah 15K.5 SCSI Product Manual, Rev. F

8.1.2 Function description

J6 jumper installation

Jumper function description

On Forces drive to use single-ended I/O drivers/receivers only. Off Drive can operate on the interface in low voltage differential mode or single-ended, depend-

ing on the voltage state of the I/O “DIFFSNS” line. Default is SE jumper not installed.

DS ME

Off Off Spindle starts immediately after power up - Default setting. Off On Drive spindle does not start until Start Unit command received from host. On Off Spindle Startup is delayed by SCSI ID times 12 seconds after power is applied, i.e., drive 0

spindle starts immediately when DC power connected, drive 1 starts after 12 second delay, drive 2 starts after 24 second delay, etc.

On On Drive spindle starts when Start Unit command received from host. Delayed start feature is

overridden and does not apply when ME jumper is installed.

On Entire drive is write protected. Off Drive is not write protected. Default is WP jumper not installed.

On Parity checking and parity error reporting by the drive is disabled. Off Drive checks for parity and reports result of parity checking to host.

Default is PD jumper not installed.

RES Off Reserved jumper position. Default is no RES jumper installed.

Off The drive does not supply terminator power to external terminators or to the SCSI bus I/O

cable.

On Drive supplies power to SCSI bus I/O cable. When drives have differential I/O circuits, a

jumper on the TP position may be needed to power external terminators (see system docu- mentation). These drives do not have terminator circuits on the drive.

Note. J6 does not exist on the LC model and is supported on the LW model only.

Cheetah 15K.5 SCSI Product Manual, Rev. F

8.2 Drive orientat ion

The balanced rot ary ar m actu ator d esign of the drive allows it to be mo unted in any orientation. A ll drive p erfor mance characterization, however, has been done with the drive in horizontal (discs level) and vertical (drive on its side) orientations, and these are the two preferred mounting orientations.

8.3 Cooling

The host enclosure must provide heat removal from the drive. You should confirm that the host enclosure is designed to ensure that the drive operates within the temperature measurement guidelines described in Section 6.4.1. In some cases, forced airflow may be required to keep temperatures at or below the temperatures specified in Section 6.4.1.

If forced air is necessary, possible air-flow patterns are shown in Figure 12. The air-flow patterns are created by fans either forcing or drawing air as shown in the illustrations. Conduction, convection, or other forced airflow patterns are acceptable as long as the temperature measurement guidelines of Section 6.4.1 are met.

Note. Air flows in the direction shown (back to front)

or in reverse direction (front to back)

Note. Air flows in the direction shown or in reverse direction (side to side)

Figure 12. Air flow (suggested)

Above unit

Under unit

Above unit

Under unit

Cheetah 15K.5 SCSI Product Manual, Rev. F

8.4 Drive mounting

When mounting the drive using the bottom holes (x-y plane in Figure 7) care must be taken to ensure that the drive is not physically distorted due to a stiff non-flat mounting surface . The allowable mounting surface stiffness is 80 lb/in (14.0 N/mm). The following equation and paragraph define the allowable mounting surface stiffness:

k * x = F < 15lb = 67N

where ‘k’ represents the mounting surface stiffness (units of lb/in or N/mm), and ‘x’ represents the out-of-plane mounting surface distortion (units of inches or millimeters). The out-of-plane distortion (‘x’) is determined by defining a plane with three of the four mounting points fixed and evaluating the out-of-plane deflection of the fourth mounting point when a known force (F) is applied to the fourth point.

Note. Before mounting the drive in any kind of 3.5-inch to 5.25-inch adapter frame, verify with Seagate

Technology that the drive can meet the shock an d vibr ation sp ecif ication s while mo unted in such an adapter frame. Adapter frames that are available may not have a mechanical structure capable of mounting the drive so that it can meet the shock and vibration specifications listed in this manual.

8.5 Grounding

Signal ground (PCBA) and HDA ground are connected together in the drive and cannot be separated by the user. The equipment in which the drive is mounted is connected directly to the HDA and PCBA with no electrically isolating shock mounts. If it is desired for the system chassis to not be connected to the HDA/PCBA ground, the systems integrator or user must provide a nonconductive (electrically isolating) method of mounting the drive in the host equipment.

Increased radiated emissions may result if you do not provide the maximum surface area ground connection between system ground and drive ground. This is the system designer’s and integrator’s responsibility.

Cheetah 15K.5 SCSI Product Manual, Rev. F

9.0 Interface requirements

This section partially describes the interface requirements as implemented on the drives.

9.1 General de scription

This section describes in esse ntiall y gene ral term s the i nte rface requi r emen ts sup port ed by the Che et ah 15K .5 SCSI. No attempt is made to describe all of the minute details of conditions and constraints that must be considered by designers when designing a system in which this family of drives can properly operate. Seagate declares that the drives operate in accordance with the appropriate ANSI Standards referenced in various places herein, with excepti o ns as n oted here in or in the Seagate Parallel SCSI Interface Manual and the S CSI Commands Reference Manual .

9.2 SCSI interface messages supported

Table 7 lists the messages supported by the Cheetah 15K.5 SCSI family drives.

Table 7: SCSI messages supported by Cheetah 15K.5 SCSI family drives

Supported (Y = yes)

Message name Message code

Abort 06h Y Abort-tag 0Dh Y Bus device reset 0Ch Y Clear ACA 16h N Clear queue 0Eh Y Command complete 00h Y Continue I/O process 12h N Disconnect 04h Y Extended messages 01h[1] Y Identify 80h-FFh Y Ignore wide residue (two bytes) 23h Y Initiate recovery 0Fh N Initiator detected error 05h Y Linked command complete 0Ah Y Linked command complete with flag 0Bh Y Message parity error 09h Y Message reject 07h Y Modify data pointer [1] N No operation 08h Y Parallel Protocol Request [1] [2] Y Queue tag messages (two bytes) ACA 24h N Head of queue tag 21h Y

(N = no)

Cheetah 15K.5 SCSI Product Manual, Rev. F

Table 7: SCSI messages supported by Cheetah 15K.5 SCSI family drives

Supported (Y = yes)

Message name Message code

(N = no)

Ordered queue tag 22h Y Simple queue tag 20h Y Quick Arbitration and Selection (QAS) 55h Y Release recovery 10h N Restore pointers 03h Y Save data pointer 02h Y Synchronous data transfer req. [1] Y Target transfer disable 13h N Terminate I/O process 11h N Wide data transfer request [1] Y

Notes.

[1] Extended messages (see the SCSI Interface Product Manual). [2] Supports all options except qas_req and iu_req.

9.3 SCSI interface commands supported

Table 8 following lists the SCSI interface commands that are supported by the drive. OEM standard drives are shipped set to operate in Ultra320 mode.

Table 8: Commands supported by Cheetah 15K.5 SCSI family drive

Command nam e Command code Supported by SCSI-2/3

Change Definition 40h N Compare 39h N Copy 18h N Copy and Verify 3Ah N Format Unit [1] 04h Y DPRY bit supported N DCRT bit supported Y STPF bit supported Y IP bit supported Y DSP bit supported Y IMMED bit supported Y VS (vendor specific) N Inquiry 12h Y Date Code page (C1h) Y Device Behavior page (C3h) Y Firmware Numbers page (C0h) Y Implemented Operating Def page (81h) Y Jumper Settings page (C2h) Y Supported Vital Product Data page (00h) Y Unit Serial Number page (80h) Y

Cheetah 15K.5 SCSI Product Manual, Rev. F

Table 8: Commands supported by Cheetah 15K.5 SCSI family drive (Continued)

Command name Command code Supported by SCSI-2/3

Lock-unlock cache 36h N Log Select 4Ch Y PCR bit Y DU bit N DS bit Y TSD bit Y ETC bit N TMC bit N LP bit N Log Sense 4Dh Y Application Client Log page (0Fh) Y Background Medium Scan page (15h) Y Buffer Over-run/Under-run page (01h) N Cache Statis tics page (37h) Y Factory Log page (3Eh) Y Last n Deferred Errors or Asynchronous Events page (0Bh) N Last n Error Events page (07h) N Non-medium Error page (06h) Y Pages Supported list (00h) Y Read Error Counter page (03h) Y Read Reverse Error Counter page (04h) N Self-test Results page (10h) Y Start-stop Cycle Counter page (0Eh) Y Temperature page (0Dh) Y Verify Error Counter page (05h) Y Write error counter page (02h) Y Mode Select (same pages as Mode Sense 1Ah) 15h Y [2] Mode Select (10) (same pages as Mode Sense 1Ah) 55h Y Mode Sense 1Ah Y [2] Caching Parameters page (08h) Y Control Mode page (0Ah) Y Disconnect/Reconnect (02h) Y Error Recovery page (01h) Y Format page (03h) Y Information Exceptions Control page (1Ch) Y Background Scan mode subpage (01h) Y Notch and Partition Page (0Ch) N Port Control Page (19h) Y Power Condition page (1Ah) Y

Cheetah 15K.5 SCSI Product Manual, Rev. F

Table 8: Commands supported by Cheetah 15K.5 SCSI family drive (Continued)

Command name Command code Supported by SCSI-2/3

Rigid Disc Drive Geometry page (04h) Y Unit Attention page (00h) Y Verify Error Recovery page (07h) Y Xor Control page (10h) N Mode Sense (10) (same pages as Mode Sense 1Ah) 5Ah Y Prefetch 34h N Read 08h Y Read Buffer (modes 0, 2, 3, Ah and Bh supported) 3Ch Y Read Capacity 25h Y Read Defect Data (10) 37h Y Read Defect Data (12) B7h Y Read Extended 28h Y DPO bit supported Y FUA bit supported Y Read Long 3Eh Y Reassign Blocks 07h Y Receive Diagnostic Results 1Ch Y Supported Diagnostics pages (00h) Y Translate page (40h) Y Release 17h Y Release (10) 57h Y Request Sense 03h Y Actual Retry Count bytes Y Extended Sense Y Field Pointer bytes Y Reserve 16h Y 3rd Party Reserve Y Extent Reservation N Reserve (10) 56h Y 3rd Party Reserve Y Extent Reservation N Rezero Unit 01h Y Search Data Equal 31h N Search Data High 30h N Search Data Low 32h N Seek 0Bh Y Seek Extended 2Bh Y Send Diagnostics 1Dh Y Supported Diagnostics pages (00h) Y

Cheetah 15K.5 SCSI Product Manual, Rev. F

Table 8: Commands supported by Cheetah 15K.5 SCSI family drive (Continued)

Command name Command code Supported by SCSI-2/3

Translate page (40h) Y Set Limits 33h N Start Unit/Stop Unit (spindle ceases rotating) 1Bh Y Synchronize Cache 35h Y Test Unit Ready 00h Y Verify 2Fh Y BYTCHK bit Y Write 0Ah Y Write and Verify 2Eh Y DPO bit Y Write Buffer (modes 0, 2, supported) 3Bh Y Firmware Download option

(modes 5, 7, Ah and Bh supported) [3] Write Extended 2Ah Y DPO bit Y FUA bit Y Write Long 3Fh Y Write Same 41h Y PBdata N LBdata N XDRead 52h N XDWrite 50h N XPWrite 51h N

[1] The drive can format to any even number of bytes per sector from 512 to 528. [2] Tables 10 show how individual bits are set and which are changeable by the host. [3] WARNING: A power loss during flash programming can result in firmware corruption. This usually makes

the drive inoperable.

Cheetah 15K.5 SCSI Product Manual, Rev. F

Table 9 lists the St anda rd Inq ui ry command data that the drive should r etur n to the ini tia tor pe r the fo rma t gi ven in the SCSI Interface Product Manual, part number 100293069, Inquiry command section.

Table 9: Cheetah 15K.5 SCSI family drive Standard Inquiry data

Bytes Data (HEX)

0-15 00 00 [03]1[12]28B 00 01 3E 53 45 41 47 41 54 45 20 VENDOR ID 16-31 53 54 [33] [33] [30] [30] [36] [35] [35] [4C] [57]320 20 20 20 20 PRODUCT ID 32-47 R# R# R# R# S# S# S# S# S# S# S# S# 00 00 00 00 48-63 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 64-79 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 80-95 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 96-111 00 43 6F 70 79 72 69 67 68 74 20 28 63 29 20 [y] COPYRIGHT 112-127 [y] [y] [y]420 53 65 61 67 61 74 65 20 41 6C 6C 20 NOTICE 128-143 72 69 67 68 74 73 20 72 65 73 65 72 76 65 64 20

[ ]103 means SCSI-3 (Ultra160) implemented. Note. Seagate has chosen to set this bit to 03, SCSI-3 (Ultra160) implemented, rather than 04, SCSI-4

(Ultra320) implemented, due to compatibility issues with some host bus adapters. This setting will not affect the Ultra320 functionality of the drive.

[ ]2The drive can be changed between these two configurations:

02 means response data in SCSI-2/SCSI-3 format. 12 means the drive uses the hierarchical addressing mode to assign LUNs to logical units (default is 12).

R# Four ASCII digits representing the last four digits of the product Firmware Release number. This informa-

tion is also given in the Vital Product Data page C0h, together with servo RAM and ROM release num-

bers. S# Eight ASCII digits representing the eight digits of the product serial number. [ ]3Bytes 18 through 26 reflect model of drive. The table above shows the hex values for Model

ST3300655LW. Refer to the values below for the values of bytes 18 through 26 of you particular model:

ST3300655LW 33 33 30 30 36 35 35 4C 57

ST3300655LC 33 33 30 30 36 35 35 4C 43

ST3146855LW 33 31 35 36 38 35 35 4C 57

ST3146855LC 33 31 35 36 38 35 35 4C 43

ST373455LW 33 37 33 34 35 35 4C 57 20

ST373455LC 33 37 33 34 35 35 4C 43 20 [ ]4Copyright Year - the year the drive’s firmware code was built.

9.3.1 Inquiry Vital Product data

Instead of the standard Inquiry data shown in Table 9, the initiator can request several Vital Product Data pages by setting the Inqui ry com mand EVP D bit to one. Th e SCSI Commands R efer ence M anual lists the Vital Product Data pages and describes their formats. A separate Inquiry command must be sent to the drive for each Vital Product Data page the initiator wants the drive to send back.

Cheetah 15K.5 SCSI Product Manual, Rev. F

9.3.2 Mode Sense data

The Mode Sense command provides a means for the drive to report its operating parameters to the initiator. The drive maintains four sets of Mode parameters, Default values, Saved values, Current values and Changeable values.

Default values are hard coded in the drive firmware that is stored in flash EPROM nonvolatile memory on the drive PCBA. Default values can be change d only by dow nloa ding a complete set of new firmware int o the flash EPROM. An initiator can request and receive from the drive a list of default values and use those in a Mode Select command to set up new current and saved values, where the values are changeable.

Saved values are stored on the disc media using a Mode Select command. Only parameter values that are allowed to be changed can be changed by this method. See “Changeable values” defined below. Parameters in the saved values list that are not changeable by the Mode Select command get their values from the default values storage. Current values are volatile values currently being used by the drive to control its operation. A Mode Select command can be used to change these values (only those that are changeable). Originally, they are installed from saved or default values after a power on reset, hard reset, or Bus Device Reset message.

Changeable value s form a b it mask, stored in nonvolatile memo ry, that dictates which of t he cur ren t values and saved values can be changed by a Mode Select command. A “one” allows a change to a corresponding bit; a “zero” allows no change. For example, in Table 10 refer to Mode page 01, in the row entitled “CHG”. These are hex numbers repr esentin g the change abl e va lues for mod e p age 01. No te that bytes 0 4, 05 , 06, a nd 07 are not changeable, because those fields are all zeros. If some changeable code had a hex value EF, that equates to the binary pattern 1110 1111. If there is a zero in an y bit positi on in the fiel d, it mea ns that bit is not change able. Bits 7, 6, 5, 3, 2, 1, and 0 are changeable, because those bits are all ones. Bit 4 is not changeable.

Though the drive always reports non-zero values in bytes 00 and 01, those particular bytes are never changeable.

The Changeable values list can only be changed by downloading new firmware into the flash EPROM. On standard OEM drives the Saved values are taken from the default values list and stored into the saved val-

ues storage location on the media prior to shipping. When a drive is powered up, it t akes saved values from the media and stores them to the curre nt values stor age in volati le mem ory. It is not possible to change the current values (or the saved values) with a Mode Select command before the drive is up to speed and is “ready.” An attempt to do so results in a “Check Condition status being returned.

Note. Because there may be several different versions of drive control firmware in the total population of

drives in the field , the Mode Sense values given in the followi ng ta bles m ay not exactly m atch t hose of some drives.

The following table s list the values of the dat a bytes returned by the drive in response to the Mode Sense command pages for SCSI Ultra160 implementation (see the SCSI Commands Reference Manual).

Definitions: SAV = Current saved value.

DEF = Default value. Standard drives are shipped configured this way. CHG= Changeable bits; indicates if current and saved values are changeable.

Note. Saved values for OEM drives are normally the same as the default values.

Cheetah 15K.5 SCSI Product Manual, Rev. F

Table 10: ST3300655 Mode sense data

MODE SENSE HEADER DATA

ab 00 10 08 22 ec b2 5c 00 00 02 00

MODE SENSE PAGES DATA

SAV 81 0a c0 0b ff 00 00 00 05 00 ff ff

DEF 81 0a c0 0b ff 00 00 00 05 00 ff ff

CHG 81 0a ff ff 00 00 00 00 ff 00 ff ff

SAV 82 0e 80 80 00 0a 00 00 00 00 00 00 00 00 00 00

DEF 82 0e 80 80 00 0a 00 00 00 00 00 00 00 00 00 00

CHG 82 0e ff ff 00 00 00 00 00 00 ff ff 87 00 00 00

SAV 83 16 68 58 00 00 00 38 00 00 03 da 02 00 00 01 00 e6 00 aa 40 00 00 00

DEF 83 16 68 58 00 00 00 38 00 00 03 da 02 00 00 01 00 e6 00 aa 40 00 00 00

CHG 83 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

SAV 84 16 01 22 64 08 00 00 00 00 00 00 00 00 00 00 00 00 00 00 3a a7 00 00

DEF 84 16 01 22 64 08 00 00 00 00 00 00 00 00 00 00 00 00 00 00 3a a7 00 00

CHG 84 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

SAV 87 0a 00 0b ff 00 00 00 00 00 ff ff

DEF 87 0a 00 0b ff 00 00 00 00 00 ff ff

CHG 87 0a 0f ff 00 00 00 00 00 00 ff ff

SAV 88 12 14 00 ff ff 00 00 ff ff ff ff 80 20 00 00 00 00 00 00

DEF 88 12 14 00 ff ff 00 00 ff ff ff ff 80 20 00 00 00 00 00 00

CHG 88 12 a5 00 00 00 ff ff ff ff 00 00 20 00 00 00 00 00 00 00

SAV 8a 0a 02 00 00 00 00 00 00 00 0f 0c

DEF 8a 0a 02 00 00 00 00 00 00 00 0f 0c

CHG 8a 0a 03 f0 00 00 00 00 00 00 00 00

SAV 19 06 01 00 ff ff 00 00

DEF 19 06 01 00 ff ff 00 00

CHG 19 06 00 00 ff ff 00 00

SAV 9a 0a 00 02 00 00 00 0a 00 00 00 04

DEF 9a 0a 00 02 00 00 00 05 00 00 00 04

CHG 9a 0a 00 03 ff ff ff ff 00 00 00 00

SAV 9c 0a 10 00 00 00 00 00 00 00 00 01

DEF 9c 0a 10 00 00 00 00 00 00 00 00 01

CHG 9c 0a 9d 0f ff ff ff ff ff ff ff ff

SAV 80 06 00 00 0f 00 00 00

DEF 80 06 00 00 0f 00 00 00

CHG 80 06 f7 40 0f 00 00 00

READ CAPACITY DATA

22 ec b2 5b 00 00 02 00

Cheetah 15K.5 SCSI Product Manual, Rev. F

Table 11: ST3146855 Mode sense data

MODE SENSE HEADER DATA

ab 00 10 08 11 17 73 30 00 00 02 00

MODE SENSE PAGES DATA

SAV 81 0a c0 0b ff 00 00 00 05 00 ff ff

DEF 81 0a c0 0b ff 00 00 00 05 00 ff ff

CHG 81 0a ff ff 00 00 00 00 ff 00 ff ff

SAV 82 0e 80 80 00 0a 00 00 00 00 00 00 00 00 00 00

DEF 82 0e 80 80 00 0a 00 00 00 00 00 00 00 00 00 00

CHG 82 0e ff ff 00 00 00 00 00 00 ff ff 87 00 00 00

SAV 83 16 34 2c 00 00 00 1c 00 00 03 da 02 00 00 01 00 e6 00 aa 40 00 00 00

DEF 83 16 34 2c 00 00 00 1c 00 00 03 da 02 00 00 01 00 e6 00 aa 40 00 00 00

CHG 83 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

SAV 84 16 01 22 64 04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 3a a7 00 00

DEF 84 16 01 22 64 04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 3a a7 00 00

CHG 84 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

SAV 87 0a 00 0b ff 00 00 00 00 00 ff ff

DEF 87 0a 00 0b ff 00 00 00 00 00 ff ff

CHG 87 0a 0f ff 00 00 00 00 00 00 ff ff

SAV 88 12 10 00 ff ff 00 00 ff ff ff ff 80 20 00 00 00 00 00 00

DEF 88 12 14 00 ff ff 00 00 ff ff ff ff 80 20 00 00 00 00 00 00

CHG 88 12 a5 00 00 00 ff ff ff ff 00 00 20 00 00 00 00 00 00 00

SAV 8a 0a 02 00 00 00 00 00 00 00 05 57

DEF 8a 0a 02 00 00 00 00 00 00 00 05 57

CHG 8a 0a 03 f0 00 00 00 00 00 00 00 00

SAV 19 06 01 00 ff ff 00 00

DEF 19 06 01 00 ff ff 00 00

CHG 19 06 00 00 ff ff 00 00

SAV 9a 0a 00 02 00 00 00 0a 00 00 00 04

DEF 9a 0a 00 02 00 00 00 05 00 00 00 04

CHG 9a 0a 00 03 ff ff ff ff 00 00 00 00

SAV 9c 0a 10 00 00 00 00 00 00 00 00 01

DEF 9c 0a 10 00 00 00 00 00 00 00 00 01

CHG 9c 0a 9d 0f ff ff ff ff ff ff ff ff

SAV 80 06 00 00 0f 00 00 00

DEF 80 06 00 00 0f 00 00 00

CHG 80 06 f7 40 0f 00 00 00

READ CAPACITY DATA

11 17 73 2f 00 00 02 00

Cheetah 15K.5 SCSI Product Manual, Rev. F

Table 12: ST373455 Mode sense data

MODE SENSE HEADER DATA

ab 00 10 08 08 8b b9 98 00 00 02 00

MODE SENSE PAGES DATA

SAV 81 0a c0 0b ff 00 00 00 05 00 ff ff

DEF 81 0a c0 0b ff 00 00 00 05 00 ff ff

CHG 81 0a ff ff 00 00 00 00 ff 00 ff ff

SAV 82 0e 80 80 00 0a 00 00 00 00 00 00 00 00 00 00

DEF 82 0e 80 80 00 0a 00 00 00 00 00 00 00 00 00 00

CHG 82 0e ff ff 00 00 00 00 00 00 ff ff 87 00 00 00

SAV 83 16 1a 16 00 00 00 0e 00 00 03 da 02 00 00 01 00 e6 00 aa 40 00 00 00

DEF 83 16 1a 16 00 00 00 0e 00 00 03 da 02 00 00 01 00 e6 00 aa 40 00 00 00

CHG 83 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

SAV 84 16 01 22 64 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 3a a7 00 00

DEF 84 16 01 22 64 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 3a a7 00 00

CHG 84 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

SAV 87 0a 00 0b ff 00 00 00 00 00 ff ff

DEF 87 0a 00 0b ff 00 00 00 00 00 ff ff

CHG 87 0a 0f ff 00 00 00 00 00 00 ff ff

SAV 88 12 14 00 ff ff 00 00 ff ff ff ff 80 20 00 00 00 00 00 00

DEF 88 12 14 00 ff ff 00 00 ff ff ff ff 80 20 00 00 00 00 00 00

CHG 88 12 a5 00 00 00 ff ff ff ff 00 00 20 00 00 00 00 00 00 00

SAV 8a 0a 02 00 00 00 00 00 00 00 02 d1

DEF 8a 0a 02 00 00 00 00 00 00 00 02 d1

CHG 8a 0a 03 f0 00 00 00 00 00 00 00 00

SAV 19 06 01 00 ff ff 00 00

DEF 19 06 01 00 ff ff 00 00

CHG 19 06 00 00 ff ff 00 00

SAV 9a 0a 00 02 00 00 00 0a 00 00 00 04

DEF 9a 0a 00 02 00 00 00 05 00 00 00 04

CHG 9a 0a 00 03 ff ff ff ff 00 00 00 00

SAV 9c 0a 10 00 00 00 00 00 00 00 00 01

DEF 9c 0a 10 00 00 00 00 00 00 00 00 01

CHG 9c 0a 9d 0f ff ff ff ff ff ff ff ff

SAV 80 06 00 00 0f 00 00 00

DEF 80 06 00 00 0f 00 00 00

CHG 80 06 f7 40 0f 00 00 00

READ CAPACITY DATA

08 8b b9 97 00 00 02 00

Cheetah 15K.5 SCSI Product Manual, Rev. F

9.4 SCSI bus conditions and m iscellaneous features supported

Asynchronous SCSI bus conditions supported by the drive are listed below. These conditions cause the SCSI device to perform certain actions and can alter the SCSI bus phase sequence. Other miscellaneous operating features supported are also listed here. Refer to the Parallel SCSI Interface Manual and the SCSI Commands Reference Manual for details.

Table 13: SCSI bus conditions and other miscellaneous features

Condition/feature supported by:

Supported Condit ions or feature

Y Adaptive Caching Y Arbitrating System Y Asynchronous Data Transfer N Asynchronous Event Notification Y Attention Condition N Auto Contingent Allegiance Condition Y Contingent Allegiance Condition Y Deferred Error Handling Y Disconnect/Reconnect N High voltage differential (HVD) interface available Y Low voltage differential (LVD) interface available Y Parameter Rounding (controlled by the Round bit in Mode Select page 0) Y Queue tagging (up to 64 Queue tags supported) Y Reporting actual retry count in Extended Sense bytes 15, 16 and 17. Y Reset Condition Y Segmented Caching Y Synchronous Data Transfer N Zero Latency Read

Supported Status

Y Good Y Check Condition Y Condition Met/Good Y Busy Y Intermediate/Good Y Intermediate/Condition Met/Good Y Reservation Conflict Y Queue Full N ACA Active

Cheetah 15K.5 SCSI Product Manual, Rev. F

9.5 Synchronous data transfer

The data transfer period to be used by the drive and the initiator is established by an exchange of messages during the Message Phase of operation. See the section on message protocol in the Parallel SCSI Interface Manual and SCSI Commands Reference Manual.

9.5.1 Synchronous data transfer periods supported

In the following tables, M is the synchronous period value (in the transfer rate negotiation message) that represents the associated transfer period and transfer rate values.

Table 14 lists the synchronous data transfer periods supported by the drive in DT DATA phase. DT DATA phase is only allowed when using the LVD interface.

Table 14: Synchronous DT DATA transfer periods

Transfer period

M (decimal)

(nanoseconds)

8 6.25 160.0 320.0 9 12.5 80.0 160.0 10 25 40.0 80.0 12 50 20.0 40.0 25 100 10.0 20.0

Table 15 lists the synchronous d at a tra nsfer per iods sup port ed by the d ri ve in ST D ATA phase. ST D ATA phase is allowed with either LVD or SE interface except as noted.

Transfer rate (megatransfers/second)

Transfer rate (MBytes/second) on wide bus

Table 15: Synchronous ST DATA transfer periods

T ransfer period

M (decimal)

(nanoseconds)

10 25 40.0

Transfer rate (megatransfers/second)

12 50 20.0 25 100 10.0 50 200 5.0

1. This transfer rate is only allowed when using the LVD interface.

9.5.2 REQ/ACK offset

Cheetah 15K.5 SCSI family drives support REQ/ACK offset values from 7 to 63 (3Fh). Offsets of 1 through 6 are negotiated to 0 (asynchronous transfer).

9.6 Physical interface

This section describes the connectors, cables, signals, terminators and bus timing of the DC and SCSI I/O interface. See Section 9.8 and Section 9.9 for additional terminator information.

Figures 13 and 14 show the locations of the DC power connector, SCSI interface connector, drive select headers, and option select headers.

Details of the physical, electrical and logical characteristics are given in sections following, while the SCSI operational aspects of Seagate drive interfaces are given in the Parallel SCSI Interface Manual.

Cheetah 15K.5 SCSI Product Manual, Rev. F

9.6.1 DC cable and connector

LW model drives receive DC power through a 4-pin connector (see Figure 15 for pin assignment) mounted at the rear of the main PCBA. Recommended part numbers of the mating connector are listed below, but equivalent parts may be used.

Type of cable Connector Contacts (20-14 AWG)

14 AWG MP 1-480424-0 AMP 60619-4 (Loose Piece)

AMP 61117-4 (Strip)

LC model drives receive power through the 80-pin I/O connector. See Tables 19 and 20.

Pin 1

Pin 1A

Pin 1

68 Pin

SCSI I/O

Connector

1P 2P 3P 4P

Pin 1P

Pin 1A

J1-DC Power

Power +12V +12V ret + 5V ret + 5V

J1-DC Power

1P2P3P4P

PCB

Figure 13. LW model drive physical interface (68-pin J1 SCSI I/O connector)

Cheetah 15K.5 SCSI Product Manual, Rev. F

80-pin

SCSI I/O

Connector

Pin 1

Figure 14. LC model drive physical interface (80-pin J1 SCSI I/O connector)

9.6.2 SCSI interface physical description

Cheetah 15K.5 SCSI drives support the physical interface requirements of the Ultra320 SCSI Parallel Interface-4 (SPI-4), and operate compatibly at the interface with devices that support earlier SCSI-2 and SCSI-3 standards. It should be noted that this is only true if the systems engineering has been correctly done, and if earlier SCSI-2 a nd S CSI- 3 devices r espon d in an acceptable manne r (p er ap pl icable S CSI Standards) to reject newer Ultra320 protocol extensions that they don’t support.

The drives documented in this manual suppo rt single-en ded and l ow voltage dif fe rentia l physical inter connect s (hereafter referred to as SE and LVD, respectively) as described in the corresponding ANSI SPI document referenced in the preceding paragraph. These drives implement driver and receiver circuits that can operate either SE or LVD. However, they cannot switch dynamically between SE and LVD operation.

The drives typically o pera te on a bus with other S CSI d evices. Al l devices on the bus must operate in the sa me mode, either SE or LVD, but not a mixture of these. All signals on the bus are common between all devices on the bus. This bus must be terminated at both ends with the proper impedance in order to operate correctly. Do not terminate inter media te S CSI devices. I n som e cases, the S CS I devices at each end have onbo ard termination circuits that can be enabled by installation of a jumper plug (TE) on the device. These termination circuits receive power from either a source internal to the device, or from a line in the interface cable specifically powered for that purpose. LC and L W mode l drives do not have onboar d ter minat ion ci rcu its. So me type o f exte rnal termination circuit s must be provid ed for these drives by the end user or desi gn ers of the equipm ent into w hich the drives will be integrated. See the ANSI T10 Standard referenced above for the maximum number of devices that can successfully operate at various interface transfer rates on SE and LVD buses.

LC model drives plug into PCBA or bulkhead connectors in the host. They may be connected in a daisy chain by the host backplane wiring or PCBA circuit runs that have adequate DC current carrying capacity to support the number of drives plugged into the PCBA or bulkhead connectors. A single 80-pin I/O connector cable cannot support the DC current needs of several drives, so no cables beyond the bulkhead connectors should be used. A single drive connected via a cable to a host 80-pin I/O connector is not recommended.

Cheetah 15K.5 SCSI Product Manual, Rev. F

Table 16 shows the interface transfer rates supported by the various drive models defined in this manual.

Table 16: Interface transfer rates supported

Maximum transfer rate

Interface type/ drive models

Asynchronous

Fast-5 Fast-10

Fast-20 (Ultra)

Fast-40 (Ultra2)

Fast-80 (Ultra160)

Fast-160 (Ultra320)

SE ST3300655LW/LC

ST3146855LW/LC

yes yes yes yes no no no

ST373455LW/LC

LVD ST3300655LW/LC

ST3146855LW/LC

yes yes yes yes yes yes yes

ST373455LW/LC

9.6.3 SCSI interface cable requirements

The characteristics of cables used to connect pa rallel interface drives are discussed in the ANSI standards referenced in this section.

9.6.3.1 Cable requirements

The characteristics of cables used to connect Ultra320 SCSI parallel interface devices are discussed in detail in Section 6 of ANSI Standard T10/1365D Rev. 3. The cable characteristics that must be considered when interconnecting the drives described in this manual in a Ultra320 SCSI parallel, daisy-chain interconnected system are:

• characteristic impedance (see T10/1365D Sections 6.3.3 and 6.3.4)

• propagation delay (see T10/1365D Sections 6.3.6 and 6.3.7)

• stub length (see T10/1365D Section 6.9)

• device spacing (see T10/1365D Section 6.9) To minimize discontinuances and signal reflections, cables of different impedances should not be used in the

same bus. Implementations may require trade-offs in shielding effectiveness, cable length, number of loads and spacing, transfer rates, and cost to achieve satisfactory system operation. If shielded and unshielded cables are mixed within the same SCSI bus, the effect of impedance mismatch must be carefully considered. Proper impedance matching is especially important in order to maintain adequate margin at FAST-20, FAST40, FAST-80, and FAST-160 SCSI transfer rates.

Note. For LVD operation, twisted pair cables are recommended. For LVD Fast-40 operation, twisted pair

cables are strongly recommended. For Fast-80 and Fast-160 operation, twisted pair cables are required.

LC Models

The 80-pin connector option provided on LC models is intended for use on drives that plug directly into backplane connector in the host equipment. In such installations, all backplane wiring segments are subject to the electromagnetic concepts presented in Standard T10/1365D, Rev. 3, Section 6. For LC model drives, installations with connectors on cables are not recommended.

9.6.4 Mating connectors

Part numbers for the different type connectors that mate with the various Cheetah 15K.5 SCSI I/O connectors are given in the sections following.

Cheetah 15K.5 SCSI Product Manual, Rev. F

9.6.4.1 Mating connectors for LW model drives

The nonshielded cab le conne ctor shall be a 68 conductor co nnecto r con sisti ng of two r ows of 3 4 ma le cont act s with adjacent contacts 0.050 inch (1.27 mm) apart.

Recommended mating flat cable connector part numbers are:

Amp Model 786096-7 Female, 68-pin, panel mount Amp Model 786090-7 Female, 68-pin, cable mount Amp Model 749925-5 (50 mil conductor centers, 28 or 30 AWG wire)

Use two, 34 conductor, 50 mil center flat cable with this co nnector. This type connector can only be used on cable ends. [1]

Amp Model 88-5870-294-5 W/O Strain Relief (25 mil conductor centers, 30 AWG wire).

Use either on cab le ends or in cable mi ddle section for daisy-chain

installations [1]. Amp Model 1-480420-0 Power connector 4 circuit housing Berg 69307-012 12-position, 2 x 6, 2 mm receptacle housing

[1] See Figure 15. The drive device connector is a nonshielded 68 conductor connector consisting of two rows of 34 female pins

with adjacent pins 50 mils apart. The connector is keyed by means of its shape (see Figure 16).

9.6.4.2 Mating connectors for LC model drives

The nonshielded connect or shall be an 80-conductor conne ctor consisting of two rows of 40 cont act s wi th a djacent contacts 50 (1.27 mm) mils apart (see Figure 17). I/O connection using a cable is not recommended. The length and size of the host equipment DC power carrying conductors from the DC power source to the host equipment 80-pi n disc dr ive i nte rface conne ctor( s) sh ould be strictly designed accord in g to pro per power tra ns mission design concepts. No possibility for the equipment user to attach an 80-pin cable/connector should be allowed, since the length of the DC power carrying conductors could not be controlled and therefore could become too long for safe power transmission to the drive. Multiconnector 80-conductor cables should especially not be allowed, since the power-carrying conductors on the 80-conductor interface were not intended to support a series of drives.

To insure that both drive connector and host equipment mating connector mate properly, both drive connector and host equipment mating connector must meet the provisions of “SFF-8451 Specification for SCA-2 Unshielded Connections.” To obtain this specification, visit the following web site: www.sffcommittee.org

Cheetah 15K.5 SCSI Product Manual, Rev. F

Recommended mating 80-position PCBA mount connectors:

“LW” Model

Straight-in connector Hot plug version (with ground guide-pin)

Seagate P/N: 77678703 Amp US P/N: or Amp US P/N: or

2-557103-1 94-0680-02-1 2-557103-2 94-0680-02-2

787311-1 with polarization 787311-2 without polarization

Amp Japan P/N: 5-175475-9

Right-angle to PCBA connectors

Seagate P/N: 77678559 Amp US P/N: 2-557101-1 Amp Japan P/N: 5-175474-9

For additional information call Amp FAX service at 1-800-522-6752.

Drive

Terminator

[7]

[6]

2 through X

SCSI devices [4]

Host

Adapter

PCB

[3]

SCSI ID 7 [5]

SCSI ID

[1]

SCSI ID 0

[2]

Pin 1

(check your

dapter for Pin 1 location)

[1] Closed end type 68-pin connector used. Terminators enabled. [2] Open end type (in-line application) connector used. [3] Host need not be on the end of the daisy-chain. Another device can be on the end with the terminator, the

host having no terminator.

[4] Total interface cable length must not exceed that specified in ANSI document T10/1365D (including host

adapter/initiator). The cable length restriction limits the total number of devices allowed. [5] SCSI ID7 has highest arbitration priority, then ID15 to ID8 (ID 8 has the very lowest priority). [6] Last drive on the daisy chain. [7] Open-end type 68-pin connector used. If end device, use external terminator and closed-end type 68-pin

connector.

Figure 15. SCSI daisy-chain interface cabling for LW drives

Cheetah 15K.5 SCSI Product Manual, Rev. F

(

.100

(2.54)

.155

.050

.022

3.650–.005 .346

1.650 .3937 .600

.519

1.816

(46.13)

Position 1

(13.18)

.315

(8.00)

.270

.0787 .200 .020 .047

.60

(15.24)

Pos.

.20

(5.08)

.085

(2.16)

typ

x 45¡ chamfe typ

.315 – .010

(8.00)

.218

5.54) Pos. 68

.050

(1.27)

1.650

(41.91)

.980

(24.89)

1.368

(37.74)

Pos. 35

3.650

(92.71)

.0787 (2.00)

Pos.

Figure 16. Nonshielded 68-pin SCSI device connector used on LW drives

.840 – .005

.767

(19.48)

(21.34)

+.001 —.002

dia

.083 (2.1)

Trifurcated Pins (4 places)

Cheetah 15K.5 SCSI Product Manual, Rev. F

7.00

(.276)

Pin 1

57.87 +/- 0.2

(2.278 +/- .008)

0.15

(.0059)

MYM

–Y–

62.15 +/- 0.15

(2.447 +/- 0.006)

0.15

(.0059)

MYM

Housing

Grounding

Pins

of Datum Y

12.70

(.500)

End View

2.15 +/- 0.10 2 places

Front View

Insert mating I/O connector

Contact

0.50

(.020)

0.3

(.012)

MYM

Pin 1

1.27

(.05)

Typ

of Datum Y

Pin 40

Pin 41 Pin 80

Figure 17 . Nonshielded 80-pi n S CS I SCA-2 connec t or used on LC drive s

Top View

Grounding

Pins

Back View

Cheetah 15K.5 SCSI Product Manual, Rev. F

Table 17: LW 68-conductor single-ended (SE) P cable signal/pin assignments [11] Note. A minus sign preceding a signal name indicates that signal is active low.

Signal name [1]

Connector contact number [3]

Cable conductor number

[2]

Connector contact number [3]

Signal name [1]

GND 1 1 2 35 –DB12 GND 2 3 4 36 –DB13 GND 3 5 6 37 –DB14 GND 4 7 8 38 –DB15 GND 5 9 10 39 –DBP1 GND 6 11 12 40 –DB0 GND 7 13 14 41 –DB1 GND 8 15 16 42 –DB2 GND 9 17 18 43 –DB3 GND 10 19 20 44 –DB4 GND 11 21 22 45 –DB5 GND 12 23 24 46 –DB6 GND 13 25 26 47 –DB7 GND 14 27 28 48 –DBP GND 15 29 30 49 GND GND 16 31 32 50 GND TermPwr 17 33 34 51 TermPwr TermPwr 18 35 36 52 TermPwr Reserved 19 37 38 53 Reserved GND 20 39 40 54 GND GND 21 41 42 55 –ATN GND 22 43 44 56 GND GND 23 45 46 57 –BSY GND 24 47 48 58 –ACK GND 25 49 50 59 –RST GND 26 51 52 60 –MSG GND 27 53 54 61 –SEL GND 28 55 56 62 –C/D GND 29 57 58 63 –REQ GND 30 59 60 64 –I/O GND 31 61 62 65 –DB8 GND 32 63 64 66 –DB9 GND 33 65 66 67 –DB10 GND 34 67 68 68 –DB11

Notes [ ]: See page following Table 20.

Cheetah 15K.5 SCSI Product Manual, Rev. F

Table 18: LW 68-conductor LVD P cable signal/pin assignments [11] Note. A minus sign preceding a signal name indicates that signal is active low.

Signal name [1]

Connector contact number [3]

Cable conductor number

[2]

Connector contact number [3]

Signal name [1]

+DB12 1 1 2 35 –DB12 +DB13 2 3 4 36 –DB13 +DB14 3 5 6 37 –DB14 +DB15 4 7 8 38 –DB15 +DBP1 5 9 10 39 –DBP1 +DB0 6 11 12 40 –DB0 +DB1 7 13 14 41 –DB1 +DB2 8 15 16 42 –DB2 +DB3 9 17 18 43 –DB3 +DB4 10 19 20 44 –DB4 +DB5 11 21 22 45 –DB5 +DB6 12 23 24 46 –DB6 +DB7 13 25 26 47 –DB7 +DBP 14 27 28 48 –DBP Ground 15 29 30 49 Ground DIFFSNS [8] 16 31 32 50 Ground TermPwr 17 33 34 51 TermPwr TermPwr 18 35 36 52 TermPwr Reserved 19 37 38 53 Reserved Ground 20 39 40 54 Ground +AT N 21 41 42 55 –ATN Ground 22 43 44 56 Ground +BSY 23 45 46 57 –BSY +ACK 24 47 48 58 –ACK +RST 25 49 50 59 –RST +MSG 26 51 52 60 –MSG +SEL 27 53 54 61 –SEL +C/D 28 55 56 62 –C/D +REQ 29 57 58 63 –REQ +I/O 30 59 60 64 –I/O +DB8 31 61 62 65 –DB8 +DB9 32 63 64 66 –DB9 +DB10 33 65 66 67 –DB10 +DB1 1 34 67 68 68 –DB11

Notes [ ]: See page following Table 20.

Cheetah 15K.5 SCSI Product Manual, Rev. F

Table 19: LC 80-pin single-ended (SE) I/O connector pin assignments [11] Note. A minus sign preceding a signal name indicates that signal is active low.

Connector Signal name [1]

contact

number [3]

Signal number [3]

Contact name[1]

12 V CHARGE 1 41 12 V GND 12 V 2 42 12 V GND 12 V 3 43 12 V GND 12 V 4 44 MATED 1 [12] NC [10] 5 45 NC [10] NC [10] 6 46 DIFFSNS [8] –DB11 7 47 GND –DB10 8 48 GND –DB9 9 49 GND –DB8 10 50 GND –I/O 11 51 GND –REQ 12 52 GND –C/D 13 53 GND –SEL 14 54 GND –MSG 15 55 GND –RST 16 56 GND –ACK 17 57 GND –BSY 18 58 GND –ATN 19 59 GND –DBP 20 60 GND –DB7 21 61 GND –DB6 22 62 GND –DB5 23 63 GND –DB4 24 64 GND –DB3 25 65 GND –DB2 26 66 GND –DB1 27 67 GND –DB0 28 68 GND –DP1 29 69 GND –DB15 30 70 GND –DB14 31 71 GND –DB13 32 72 GND –DB12 33 73 GND +5 V 34 74 MATED 2 +5 V 35 75 5 V GND +5 V 36 76 5 V GND NC [10] 37 77 ACTIVE LED OU T [4] [9] RMT-START [5] [9] [12] 38 78 DLYD-START [6] [9] [12] SCSI ID (0) [7] [9] [12] 39 79 SCSI ID (1) [7] [9] [12] SCSI ID (2) [7] [9] [12] 40 80 SCSI ID (3) [7] [9] [12]

Notes [ ]: See page following Table 20.

Cheetah 15K.5 SCSI Product Manual, Rev. F

Table 20: LC 80-pin single-ended (LVD) I/O connector pin assignments [11] Note. A minus sign preceding a signal name indicates that signal is active low.

Signal name [1]

Connector contact number [3]

Signal number [3]

Contact name[1]

12 V CHARGE 1 41 12 V GND 12 V 2 42 12 V GND 12 V 3 43 12 V GND 12 V 4 44 MATED 1 [12] NC [10] 5 45 NC [10] NC [10] 6 46 DIFFSNS [8] –DB11 7 47 +DB1 1 –DB10 8 48 +DB10 –DB9 9 49 +DB9 –DB8 10 50 +DB8 –I/O 11 51 +I/O –REQ 12 52 +REQ –C/D 13 53 +C/D –SEL 14 54 +SEL –MSG 15 55 +MSG –RST 16 56 +RST –ACK 17 57 +ACK –BSY 18 58 +BSY –ATN 19 59 +ATN –DBP 20 60 +DBP0 –DB7 21 61 +DB7 –DB6 22 62 +DB6 –DB5 23 63 +DB5 –DB4 24 64 +DB4 –DB3 25 65 +DB3 –DB2 26 66 +DB2 –DB1 27 67 +DB1 –DB0 28 68 +DB0 –DBP1 29 69 +DP1 –DB15 30 70 +DB15 –DB14 31 71 +DB14 –DB13 32 72 +DB13 –DB12 33 73 +DB12 +5 V 34 74 MATED 2 +5 V 35 75 5 V GND +5 V CHARGE 36 76 5 V GND NC [10] 37 77 ACTIVE LED OUT [4] [9] RMT_START [5] [9] [12] 38 78 DLYD_START [6] [9] [12] SCSI ID (0) [7] [9] [12] 39 79 SCSI ID (1) [7] [9] [12] SCSI ID (2) [7] [9] [12] 40 80 SCSI ID (3) [7] [9] [12]

Notes [ ]: See page following this table.

Cheetah 15K.5 SCSI Product Manual, Rev. F

Notes [ ] for Tables 17 through 20.

[1] See Section 9.6.4.1 for detailed electrical characteristics of these signals. [2] The conductor number refers to the conductor position when using 0.025-inch (0.635 mm) centerline flat

ribbon cable. Other cables types may be used to implement equivalent contact assignments. [3] Connector contacts are on 0.050 inch (1.27 mm) centers. [4] Front panel LED signal; indicates drive activity for host front panel hard drive activity indicator. [5] Asserted by host to enable Motor Start option (enables starting motor via SCSI bus command). [6] Asserted by host to enable Delayed Motor Start option (mo tor sta rt s at power on o r af te r a del ay o f 12 sec -

onds times drive ID). This and [3] above are mutually exclusive options. [7] Binary code on A3, A2, A1 and A0 asserted by host to set up SCSI bus ID in drive. [8] GND provides a means for dif fer ential devi ces to detect the p resen ce of a si ngle e nded device o n the bus.

Drive will not operate I/O bus at Ultra2 or faster SCSI data rates if this is grounded. [9] Signals [4] through [7] are used in place of installing jumpers and cables on option select connector J6.

See Section 8.1.1 notes. [10] “NC” means no connection. [11] 8 bit devices which are connected to the 16 data bit LVD I/O shall leave the following signals open: –DB8,

–DB9, –DB10, –DB11, –DB12, –DB13, –DB14, –DB15, and –DBP1.

8 bit devices which are connected to the 16 data bit single-e nded (SE) I/O shall have the following signals

open: DB8, –DB9, –DB10, –DB11, –DB12, –DB13, –DB14, –DB15, and –DBP1.

All other signals should be connected as shown. [12] Pins 38, 39, 40, 44, 78, 79, and 80 are option select pins and are tied high by the drive circuitry. The pre-

ferred electrica l connect ion at the backpl an e is ei ther open or gr ound ed (o pen fo r the ‘1 ’ setti ng, g roun ded

for the ‘0’ setting). Alternatively, these pins may be driven by a 3.3V logic device, pulled up to 3.3V

through a pull-up resistor (recommended size of 10K ohm), or grounded through some other means.

9.7 Electrical description

Cheetah 15K.5 SCSI drives are multimode devices. That is, their I/O circuits can operate as either singleended or low voltage differential drivers/receivers (selectable using the I/O “DIFFSENS” line).

See ANSI Standard T10/1320D for detailed electrical specifications.

9.7.1 Multimode—SE and LVD alternatives

When the interface “DIFFSNS” line is between -0.35 V and +0.5 V, the drive interface circuits operate singleended and up to and including 20 M transfers/s (Fast-20 or Ultra SCSI). When “DIFFSNS” is between +0.7 V and +1.9 V, the drive interface circuits operate low voltage differential and up to and including 160 M transfers/s or less (Fast-160 or Ultra320 SCSI).

This multimode design does not allow dynamically changing transmission modes. Drives must operate only in the mode for which the installation and interface cabling is designed. Multimode I/O circuits used by these drives do not operate at hi gh volt age di f feren tial levels and shoul d ne ver be exposed to high vo lt ag e dif fer enti al environments unless the common mode voltages in the environment are controlled to safe levels for singleended and low voltage differential devices (see ANSI SPI-4 specification T10/1365D).

LC and L W model drives do not have onboard terminators. Termination of the I/O lines must be provided for by the Host equipment designers or end users.

LVD output characteristics

Each differential signal driven by LVD interface drivers shall have the following output characteristics when measured at the disc drive connector:

Steady state Low level output differential voltage = 0.32 V = < |Vs| = < 0.8 V (signal negation/logic 0) Steady state High level output differential voltage = 0.32 V = < |Vs| = < 0.8 V (signal assertion/logic 1)

Cheetah 15K.5 SCSI Product Manual, Rev. F

LVD Input characteristics

Each differential signal received by LVD interface receiver circuits shall have the following input characteristics when measured at the disc drive connector:

Steady state Low level input differential voltage = 0.030 V = < Vin = < 3.6 V (signal negation/logic 0) Steady state High level input differential voltage = –3.6 V = < Vin = < –0.030 V (signal assertion/logic 1) Differential voltage = +0.030 V minimum with common-mode voltage range 0.845 V = < Vcm = < 1.685 V. (T10/1302D revision 20b, section A.3.1).

VCCA VCCB

Single Ended Circuitry

Single Ended Ground Driver

Ground

Single Ended: LVD:

GND

+Signal

LVD Signal Drivers

LVD

Receiver

LVD Signal Drivers

Single Ended Receiver

—Signal —Signal

Single Ended Negation Driver

Single Ended Assertion Driver

Figure 18. Typical SE-LVD alternative transmitter receiver circuits

9.7.1.1 General cable characteristics

To Minimize discontinuities and signal reflections, cables of different impedances should not be used in the same bus. Implementations may require trade-offs in shielding effectiveness, cable length, the number of loads, transfer rates, and cost to achieve satisfactory system operation. If shielded and unshielded cables are mixed within the same SCSI bus, the effect of impedance mismatch must be carefully considered. Proper impedance matching is especially important in order to maintain adequate margin at fast SCSI transfer rates.

9.7.1.2 Single-end ed driver s/r eceiv ers

The maximum total cable length allowed with drives using single-ended I/O driver and receiver circuits depends on several factors. Table 21 lists the maximum lengths allowed for different configurations of drive usage. These values are from the SPI documents. All device I/O lines must have equal to or less than 25 pf capacitance to ground, measured at the beginning of the stub.

Table 21: Cable characteristics for single-ended circuits

I/O transfer rate

<10M transfers/s (Fast 10) 16 (wide SCSI bus) 3 meters (9.8 ft) 90 + 6 Ohms 90 + 10 Ohms <20M transfers/s (Fast 20) 4 (wide SCSI bus) 3 meters (9.8 ft) 90 + 6 Ohms 90 + 10 Ohms <20M transfers/s (Fast 20) 8 (wide SCSI bus) 1.5 meters (4.9 ft) 90 + 6 Ohms 90 + 10 Ohms

A stub length of no mor e than 0.1 me ter (0.33 ft) is allowe d off the mainline intercon necti on with a ny conne cted equipment. The stub length is measured from the transceiver to the connection to the mainline SCSI bus.

Maximum number of devices on the bus

Maximum length between SCSI S.E. terminators

Transmission line impedance

REQ/ACK Other signals

Cheetah 15K.5 SCSI Product Manual, Rev. F

Single-ended I/O cable pin assignments for LW drives are shown in Table 18. Single-ended I/O pin assi gnme nt s for LC models are shown in Table 19. The LC model does not require an I/O

cable. It is designed to connect directly to a back panel connector.

9.7.1.3 Cables for low voltage differential drivers/receivers

The SPI-3 and SPI-4 specification for differential impedance for LVD cables is 122.5 + 12.5 ohms. The maximum SCSI bus length between the terminators for a SCSI LVD point-to-point system (one initiator

and one target) is 25 meters (82 feet). The maximum SCSI bus length between the terminators for a SCSI LVD multidrop system (up to 16 total SCSI

devices) is 12 meters (39.37 feet). However, implementation of this 12-meter total length is dependent on the configuration of the system and the choice of cable. See Tables 22 and 23 for examples of recommended SCSI LVD cable types and lengths.

It should be noted from the data in Tables 22 and 23 that shielded round twisted-pair cables can be used to implement a 12-m eter system , while Twist-n-flat cables cannot be used to imp lement a 1 2-m eter system due to higher levels of attenuation and crosstalk. In addition, twist-n-flat cables with shorter sections of twist allow greater crosstalk and their lengths must be reduced as shown in Table 23.

Table 22: Shielded round twisted-pair cables—into a multi-drive backplane

Cable

description

30 AWG

solid

28 AWG

stranded

28 AWG

stranded

SingleDifferential impedance

, nominal

130 ohms 90 ohms 17 pF/ft 1.36 ns/ft 0. 113 ohms/ft

123 ohms 80 ohms 19 pF/ft 1.54 ns/ft 0.067 ohms/ft

132 ohms 85 ohms 20 pF/ft 1.50 ns/ft 0.065 ohms/ft

ended

impedance,

nominal

Single-

ended

capacitance,

maximum

Time

delay,

nominal

T a ble 23: Tw ist- n-f lat cabl es—in to a multi- drive back plan e

Single-

ended

capacitance,

maximum

delay,

nominal

Cable description

TPE, 22.25” twist,

1.75” flat, (24” flat to flat), 30 AWG

solid tinned copper

Differential impedance

, nominal

131 ohms 93 ohms 15.3 pF/ft 1.45 ns/ft 0.105 ohms/ft

Single-ended

impedance,

nominal

Time

Conductor

resistance,

nominal

Conductor

resistance,

nominal

Maximum shielded round

twisted-pair cable length

for U160/U320

12 meters minus the SCSI

trace length of the backplane

12 meters minus the SCSI

trace length of the backplane

12 meters minus the SCSI

trace length of the backplane

Maximum Twist-n-flat

cable length

U320 U160

3.05 meters (10.0 ft)

6.1 meters (20.0 ft)

TPE, 8.1” twist,

1.75” flat, (9.85” flat to flat), 30 AWG

solid tinned copper

TPE, 4.25” twist,

1.75” flat, (6” flat to flat), 30 AWG solid

tinned copper

131 ohms 93 ohms 15.3 pF/ft 1.45 ns/ft 0.105 ohms/ft

2.45 meters (8.33 ft)

1.52 meters

(5.0 ft)

4.9 meters (16.66 ft)

3.04 meters (10.0 ft)

Cheetah 15K.5 SCSI Product Manual, Rev. F

9.8 Terminator requirements

Caution: These drives do not have onboard internal terminators. The user, systems integrator or host equip-

ment manufactur er m ust provide a term inator ar rang emen t external to the dr ive whe n ter mi na tion is required. For LW drives, terminator modules can be purchased that plug between the SCSI I/O cable and the drive I/O connector or on the end of a short I/O cable stub extending past the last cable connector. LC drives are designed to be plugged into a backpanel connector without cabling.

9.9 Terminator power

LW drives

You can configure terminator power from the drive to the SCSI bus or have the host adaptor or other device supply terminator power to the external terminator. See Section 8.1 for illustrations that show how to place jumpers for this configuration.

LC drives

These drives cannot furnish terminator power because no conductors in the 80-pin I/O connector are devoted to terminator power.

Cheetah 15K.5 SCSI Product Manual, Rev. F

9.10 Disc drive SCSI timing

Table 24: Disc drive SCSI timing

These values are not current Cheetah 15K.5 SCSI values, but are listed for information only.

Description

Waveform symbol [1]

Waveform table [1] Typical timi ng

Target Select Time (no Arbitration) T00 N/A <1 μs Target Select Time (with Arbitration) T01 4.5-1,2 1.93 μs Target Select to Command T02 4.5-1 3.77 μs Target Select to MSG Out T03 4.5-2 1.57 μs Identify MSG to Command T04 4.5-3 3.36 μs Command to Status T05 4.5-5 Command Depen-

dent

Command to Data (para. In) T06 4.5-9 Command Depen-

dent

Command to Data (para. Out) T07 4.5-10 Command Depen-

dent

Command to Data (Write to Data Buffer) T08 4.5-10 Command Depen-

dent

Command to Disconnect MSG T09 4.5-6 Command Depen-

dent Disconnect MSG to Bus Free T10 4.5-6,14 0.52 μs Disconnect to Arbitration (for Reselect)

This measures disconnected CMD over-

T11 4.5-6 Command Depen-

dent head

Target win Arbitration (for Reselect) T12 4.5-7 3.00 μs Arbitration to Reselect T13 4.5-7 1.60 μs Reselect to Identify MSG In T14 4.5-7 1.39 μs Reselect Identify MSG to Status T15 4.5-8 Command Depen-

dent Reselect Identify MSG to Data (media) T16 4.5-11 Command Depen-

dent Data to St atus T17 4.5-15 Command Depen-

dent Status to Command Complete MSG T18 4.5-5,8,15 0.98 μs Command Complete MSG to Bus Free T19 4.5-5,8,15 0.51 μs Data to Save Data Pointer MSG T20 4.5-14 4.00 μs Save Data Pointer MSG to Disconnect MSG T21 4.5-14 0.79 μs Command Byte Transfer T22 4.5-4 0.04 μs Next Command Byte Access: 4.5-4 Next CDB Byte Access (Byte 2 of 6) T23.6.2 4.5-4 0.58 μs Next CDB Byte Access (Byte 3 of 6) T23.6.3 4.5-4 0.12 μs Next CDB Byte Access (Byte 4 of 6) T23.6.4 4.5-4 0.12 μs Next CDB Byte Access (Byte 5 of 6) T23.6.5 4.5-4 0.12 μs Next CDB Byte Access (Byte 6 of 6) T23.6.6 4.5-4 0.12 μs

Cheetah 15K.5 SCSI Product Manual, Rev. F

Table 24: Disc drive SCSI timing (Continued)

These values are not current Cheetah 15K.5 SCSI values, but are listed for information only.

Description

Waveform symbol [1]

Waveform table [1] Typical timing

Next CDB Byte Access (Byte 2 of 10) T23.10.2 4.5-4 0.59 μs Next CDB Byte Access (Byte 3 of 10) T23.10.3 4.5-4 0.11 μs ±1 μs Next CDB Byte Access (Byte 4 of 10) T23.10.4 4.5-4 0.12 μs ±1 μs Next CDB Byte Access (Byte 5 of 10) T23.10.5 4.5-4 0.11 μs ±1 μs Next CDB Byte Access (Byte 6 of 10) T23.10.6 4.5-4 0.11 μs ±1 μs Next CDB Byte Access (Byte 7 of 10) T23.10.7 4.5-4 0.13 μs ±1 μs Next CDB Byte Access (Byte 8 of 10) T23.10.8 4.5-4 0.12 μs ±1 μs Next CDB Byte Access (Byte 9 of 10) T23.10.9 4.5-4 0.12 μs ±1 μs Next CDB Byte Access (Byte 10 of 10) T23.10.10 4.5-4 0.12 μs ± 1 μs Data In Byte Transfer (parameter) T24 4.5-12 0.04 μs Data Out Byte Transfer (parameter) T25 4.5-13 0.04 μs Next Data In Byte Access (parameter) T26 4.5-12 0.12 μs Next Data Out Byte Access (parameter) T27 4.5-13 0.12 μs Data In Byte Transfer (media) [2] T28 4.5-12 0.04 μs Data Out Byte Transfer (media) [2] T29 4.5-13 0.04 μs Next Data In Byte access (media [2] T30 4.5-12 0.12 μs Next Data Out Byte access (media [2] T31 4.5-13 0.12 μs MSG IN Byte Transfer T32 4.5-5,7,8,14,15 0.04 μs MSG OUT Byte Transfer T33 4.5-2 0.04 μs ST ATUS Byte Transfer T34 4.5-5,8,15 0.04 μs Synchronous Data Transfer Characteristics: Request Signal Transfer Period [3] – – various (800 ns max)

Notes.

[1] See the Timing examples section of the Parallel SCSI Interface Manual. [2] Maximum SCSI asynchronous interface transfer rate is given in Section 4.2.3 of this manual. [3] Synchronous Transfer Period is determined by negotiations between an Initiator and a Drive. The Drive is

capable of setting periods as given in Sect ion 9.5. See also the Synchronous data transfer section and the Extended messages section of the Parallel SCSI Interface Manual for a description of synchronous data transfer operation.

Cheetah 15K.5 SCSI Product Manual, Rev. F

9.11 Drive activity LED

The following table provides drive activity LED status.

Table 25: Drive activity LED status

Spindle status Command status LED status

Spinning up with DC power applied N/A On until spinup is complete Spun down Start Unit On while processing the command Powered down by removal of DC

power Spun up Stop Unit On while processing the command Spun down No command activity Off Spun down Write/Read Buffer On while processing the command Spun down SCSI Bus Reset On while processing the reset Spun down Test Unit Ready On while processing the command Spun up No command activity Off Spun up Write/Read On while processing the command Spun up SCSI Bus Reset On while processing the reset Spun up Tes t Unit Ready On while processing the command Spun up Format with Immediate option on On while the command is initially processed Spun up Format without Immediate LED toggles on/off on each cylinder boundary Spun up Write Same Command in

N/A Off due to absence of power

Toggles on/off

progress

Cheetah 15K.5 SCSI Product Manual, Rev. F

10.0 Seagate Technology suppo rt services

Internet

For information regarding Seagate products and services, visit www.seagate.com. Worldwide support is available 24 hours daily by email for your questions.

Presales Support:

Presales@Seagate.com

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DiscSupport@Seagate.com

Warranty Support:

http://www.seagate.com/support/service/index.html

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Seagate technical support is available to assist you online at support.seagate.com or through one of our call centers. Have your system configuration information and your “ST” model number available.

SeaTDD™ (+1-405-324-3655) is a telecommunications device for the deaf (TDD). You can send questions or comments 24 hours daily and exchange messages with a technical support specialist during normal business hours for the call center in your region.

Cheetah 15K.5 SCSI Product Manual, Rev. F

Customer Service Operations

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Seagate offer s worldwi de custom er supp ort for Seagate pro duct s . Seagate distr i butors, OEM s and other direct customers should contact their Seagate Customer Service Operations (CSO) representative for warrantyrelated issues. Resellers or end users of drive products should contact their place of purchase or Seagate warranty service for assistance. Have your serial number and model or part number available.

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Cheetah 15K.5 SCSI Product Manual, Rev. F

Index

Symbols

+5 and +12 volt supplies 24

Numerics

68-conductor connector 62 68-pin connector 63 80 conductor connector 62 80 conductor interface 62 80-pin connector option 61 80-pin I/O connector 68, 69

AC power 23 access time 12 accessories 10 acoustics 34 activity indicator 70 activity LED 76 actuator 45 actuator assembly 8 AFR 15 air cleanliness 33 air flow 45

suggested 45 altitude 30 altitude and atmospheric pressure 30 ambient 30 Annualized Failure Rate 15 Annualized Failure Rates (AFR) 16 ANSI SCSI documents 5 arbitration priority 63 asynchronous interface transfer rate 75 audible noise 3 Australia/New Zealand Standard 4 automatic retry 15 automatic shipping lock 8 average idle current 23, 24 average latency 9 average rotational latency 11, 12

Background Media Scan 39 background processing 9 backward compatibility 7 bits/inch 11 BMS 39 buffer 13

space 13 bulkhead connector 60 bus device reset message 53

bytes per sector 51

cable 59 cache 13 cache buffer 9 cache mode 13 cache operation 13 cache segments 14 caching write data 14 Canadian Department of Communications 3 capacities 10 capacity, drive, programmable 10 CE Marking 4 changeable bit 53 changeable value 53 check condition 53 circuits 71 class B limit 3 command 13, 48 command descriptor block (CDB) 12 command queuing 9 condensation 30 conducted noise immunity 24, 25 connect/disconnect 12 connector 59 connector contact 70 continuous vibration 33 controller 13 controller overhead 12 cooling 45 C-Tick Marking 4 current 25 current profile 25, 26 current requirements 23 current value 53

daisy-chain 25, 60, 63 DAR 40 data block size

modifing the 9 data correction 15 data transfer period 58 data transfer protocol 8 data transfer rate 12 DC cable and connector 59 DC current 60 DC power 13, 15, 44, 59 DC power carrying conductor 62 DC power connector 58 DC power requirements 23 DC power source 62 dedicated landing zone 7

Cheetah 15K.5 SCSI Product Manual, Rev. F

default 43, 44 default mode parameter 41 default value 53 defect/error management 37 defects 37 Deferred Auto-Reallocation 40 delayed motor start option 23, 24, 70 delayed start 44 differential I/O circuit 44 differentiating features 7 dimensions 34 disc rotational speed 11 drive 33 drive activity 70 drive activity LED 76 drive capacity 11

programmable 10 drive default mode parameter 41 drive firmware 53 drive ID 41 drive ID select jumper connector 41 drive ID/option select header 41 drive interface connector 62 drive internal defects and errors 37 drive mounting 34, 46

constraints 15 drive orientation 45 drive power 41 drive primary defects list 37 drive SCSI timing 74 drive select header 58 drive spindle 44 dynamic spindle brake 8

ECC 15 ECC correction capability 8 electrical characteristics 58, 70 electromagnetic compatibility 3 electromagnetic susceptibility 34 embedded servo 8 EMC compliance 4 EMI requirements 3 environmental control 33 environmental limits 30 environmental requ ireme nts 15 EPROM 53 error 15

management 37 error management system 39 error rate 15 error recovery 37 errors 37 ETF defect list 37 European Union requirements 4

EVPD bit 52 execution time 12 extended messages 48

FCC rules and regulations 3 firmware 53 flat ribbon cable 70 flaw reallocation 12 format 51 format command 12 format time 12 formatting 41 front panel 34 front panel LED 70

gradient 30 ground return 24 grounding 46

hard reset 53 HDA 7, 46 heat removal 45 host 44, 51, 60, 63 host adapter 41

adapter/initiator 63 host backplane wiring 60 host equipment 46, 61, 62

DC power 62 host I/O signal 41 host system 41 host system malfunction 15 host/drive operational interface 15 hot plug 8, 17 humidity 30

I/O connector 60 identified defect 37 Idle Read After Write 40 Input characteristics 71 inquiry command 52 inquiry vital product data 52 installation 41 installation guide 10 installation instructions 41 instantaneous current peak 24 integrated Ultra1/Ultra2 SCSI controller 8 interface cable length 63 interface data 12 interface requirements 47

Cheetah 15K.5 SCSI Product Manual, Rev. F

interface timing 15 internal data rate 11 IRAW 40

J1-auxiliary 41 jumper 10, 41, 43, 44, 70 jumper function description 44 jumper header 43 jumper plug type 41

landi ng zone 8 LED 76 logical block address 13 logical characteristics 58 logical segments 13 low voltage differential (LVD) drivers an d rece iv ers 8 LVD 70 LVD interface receiver circuits 71

mating connector 59, 61, 62 mating flat cable connector 62 maximum current requirements 25 maximum operating current 24 maximum starting current 23, 24 ME jumper 44 mean time between failure (MTBF) 16 media 8, 53 Media Pre-Scan 39 message protocol 58 message protocol system 39 messages

SCSI interface 47 miscellaneous features 57 mode page 01 53 mode page 08h 13 mode parameter 53 mode select command 13, 53 mode sense command 53 mode sense data 53 mode sense value 53 model number table 7 motor start command 13 motor start delay option 70 motor start option 13, 24, 70 mounting configuration 34 mounting configuration dimensions 34, 35 mounting constraints 15, 46 mounting point 46 mounting surface 46 mounting surface distortion 46 mounting surface stiffness 46

MTBF 15, 16 multiconnector

80 conductor 62 multimode drivers and receivers 8 multi-segmented cache control 13

noise 25

audible 3 non-operating 30, 31, 33

temperature 30 non-operating vibration 33 nonshielded 68 conductor connector 62

office environment 33 operating 30, 31, 33 operating option 41 operating parameter 53 option jumper 41 option jumper location 41 option select header 58 option select jumper 41 options 10 orientation 31, 45 out-of-plane deflection 46 out-of-plane distortion 46 Output characteristics 70

package size 31 package test specification 5 packaged 31 parity 44 parity checking 44 parity error 44 PCB 43 PCBA 41, 46, 53, 59, 60, 63 PCBA circuit run 60 PD jumper 44 peak bits/inch 11 peak starting current 24 performance characteristics 11 performance degradation 31 peripheral I/O cable 25 physical characteristics 58 physical damage 33 physical interface 58, 60 power 24, 44 power connector 23, 25 power control switch 13 power dissipation 27 power distribution 3 power sequencing 25

Cheetah 15K.5 SCSI Product Manual, Rev. F

power supply voltage 15 power-carrying conductor 62 power-on 41, 70 power-on reset 53 power-up 25, 44 prefetch 13 prefetch (read look-ahead) 13 prefetch mode 13 prefetch operation 13 prefetch segmented cache control 13 preventive maintenance 15, 16 product data page 52 programmable drive capacity 10

radio interference regulations 3 RCD bit 13 read error rate 15 read error rates 37 read retry count 37 read/write head 11 ready 53 receive diagnostic results 39 receiver circuits 71 recommended mounting 32 Recoverable Errors 15 reference documents 5 regulation 23, 24 relative humidity 30 reliability 9 reliability and service 16 reliability specifications 15 remote switch 41 repair information 22 REQ/ACK offset 58 request sense command 39 resonance 31

S.M.A.R.T. 9, 17 safe power transmission 62 safety 3 saved value 53 SCSI

commands 48 interface data transfer rate 12

messages 47 SCSI bus cable 41 SCSI bus condition 57 SCSI bus ID 70 SCSI bus phase sequence 57 SCSI command 37 SCSI Commands Reference Manual 5 SCSI I/O connector 60

SCSI ID 41, 44 SCSI interface 13, 60 SCSI interface cable 61 SCSI interface commands supported 48 SCSI interface connector 58 SCSI interface data 12 SCSI Interface Product Manual 3, 5, 7 SCSI systems error 39 SCSI systems error management 39 Seagate support service 41 sector sizes 12 seek error 15

defined 16

Self-Monitoring Analysis and Reporting Technology.

See S.M.A.R.T.

SE-LVD alternative 71 shielding 3 shipping 22 shipping container 30 shock 31

and vibration 31 shock mount 46 signal ground 46 single unit shipping pack 10 single-ended (SE) drivers and receivers 8 spindle startup 44 standard day 30 standards 3 start motor command 24 start unit command 44 start/stop time 13 status 39 stop spindle 13 stop time 13 straight-in connector 63 supply voltage 24 support services 77 synchronous data transfer 58 synchronous data transfer operation 75 synchronous data transfer period 58 synchronous transfer period 75 system chassis 46

technical support services 77 temperature 19, 30, 45

non-operating 30

regulation 3

See also cooling temperature sensor 19 termination 25 terminator enable jumper TE 63 terminator power 73 terminator requirements 41, 73 thermal monitor 19

Cheetah 15K.5 SCSI Product Manual, Rev. F

TP1 position 44 tracks/inch 11 tracks/surface, total 11 transfer period 58 transmitter receiver circuits 71 Tunneling Magnetoresistive heads 7

Ultra160 53 Ultra160 mode 48 Ultra160 SCSI interface 7 Ultra320 SCSI controller 8 unformatted 9 Unrecoverable Errors 15

vibration 31, 33 vital product data 52 volatile memory 53 voltage 23, 24

warranty 9, 21 wet bulb temperature 30 wide Ultra160 SCSI interface 7 WP jumper 44 write protect 44 write retry count 37

zoned bit recording (ZBR) 8

Seagate Technology LLC 920 Disc Drive, Scotts Valley, California 95066-4544, USA

Publication Number: 100384776, Rev. F, Printed in USA

Seagate CHEETAH 15K.5 SCSI User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

1.0 Scope

2.0 Applicable standards and reference documentation

2.1 Standards

2.1.1 Electromagnetic compatibility

2.1.2 Electromagn etic susc ept ibili ty

2.2 Electroma gnetic compliance

2.3 European Uni on Restric tion of Hazardous Substances (RoHS)

2.4 Reference documents

3.0 General description

3.1 Standard featu re s

3.2 Media char ac teristics

3.3 Performance

3.4 Reliability

3.5 Formatted ca pacities

3.5.1 Programmable drive capacity

3.6 Factory instal led accessories

3.7 Options (factory installed)

3.8 Accessories

4.0 Performance characteristics

4.1 Internal drive characteristics (transparent to user)

4.2 SCSI performance characteristics (visible to user)

4.2.1 Seek time

4.2.2 Format command execution time (minutes) [1]

4.2.3 Generalized performance characteristics

4.3 Start/stop time

4.4 Prefetch /m ulti-segmen te d cache contro l

4.5 Cache operation

4.5.1 Caching write data

4.5.2 Prefetch operation

5.0 Reliability specifications

5.1 Error rates

5.1.1 Recoverable Errors

5.1.2 Unrecoverable Error

5.1.3 Seek errors

5.2 Reliability and service

5.2.1 Annualized Failure Rate (AFR) and Mean Time Between Failures (MTBF)

5.2.2 Preventive mainte nan ce

5.2.3 Hot plugging Cheetah 15K.5 SCSI disc drives

5.2.4 S.M.A.R.T.

5.2.5 Thermal monitor

5.2.6 Drive Self Test (DST)

5.2.6.1 DST Failure Definition

5.2.6.2 Implementation

5.2.6.2.1 State of the drive prior to testing

5.2.6.2.2 Invoking DST

5.2.6.2.3 Short and extended tests

5.2.6.2.4 Log page entries

5.2.6.2.5 Abort

5.2.7 Product warranty

6.0 Physical/electrical specifications

6.1 AC power requirements

6.2 DC power requirements

6.2.1 Conducted noise immunity

6.2.2 Power sequencing

6.2.3 Current profile

6.3 Power dissipation

6.4 Environmental limits

6.4.1 Temperature

6.4.2 Relative humidity

6.4.3 Effective altitude (sea level)

6.4.4 Shock and vibration

6.4.4.1 Shock

6.4.4.2 Vibration

6.4.5 Air cleanliness

6.4.6 Corrosive environment

6.4.7 Acoustics

6.4.8 Electromagn etic susc ept ibili ty

6.5 Mechanical specifications

7.0 Defect and error management

7.1 Drive in ternal defects

7.2 Drive error recov ery procedures

7.3 SCSI system s errors

7.4 Background Media Scan

7.5 Media Pr e- Scan

7.6 Deferred Auto-Reallocation

7.7 Idle Read After Write