Seagate ST15230ND, ST15230N, HAWK 4 User Manual

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HAWK 4 Family:

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ST15230N/ND

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Product Manual, Volume 1

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HAWK 4 Family:

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ST15230N/ND

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Product Manual, Volume 1

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Publication Number: 77767472 Re vision F March 1996

Seagate®, Seagate Technology® and the Seagate logo are registered trademarks of Seagate Technology, Inc. Ha wk™, SeaF AX, SeaF one, SeaTDD and SeaBO ARD are trademarks of Seagate Technology, Inc. Other product names are registered tr ademarks or trademarks of their owners.

Seagate reserves the right to change, without notice, product offerings or specifications. No par t of this publication may be reproduced in any f orm without written permission of Seagate Technology , Inc.

Product Manual - Hawk 4 Famil y SCSI-2 (Volume 1), Rev. F v _____________________________________________________________________________________

Revision status summary sheet

Revision Authority Date Writer/Eng. Sheets Affected

A Issue 09/01/94 D. Ashby v thru viii, 1 thru 60.

Brent Douglas

B PLD: 87088 11/02/94 D. Ashby v, 12, 13, 38 - 40

C PLD: 87187 06/05/95 Brent Douglas v, 23, 36 D PLD:87236 08/30/95 D. Ashby 1v and 34 E PLD: 87305 1/24/96 D . Ashby v, vi, 2, 12 and 21 F PLD: 87334 v and 18

Brent Douglas

Notice. Product Manual 77767472 is Volume 1 of a tw o Volume document with the SCSI interface information

in the V olume 2 SCSI Interface Pr oduct Man ual, P/N 77738479.

If the SCSI Interface information is needed the Volume 2 Interface Manual should be ordered, P/N

77738479.

vi Product Manual - Hawk 4 Family SCSI-2 (Volume 1), Rev. F _____________________________________________________________________________________

T able of contents

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

2.0 Applicable standards and reference documentation.............................................................. 2

2.1 Standards ....................................................................................................................... 2

2.2 Electromagnetic Compliance for the European Union..................................................... 2

2.3 Applicable reference documents..................................................................................... 2

3.0 General description................................................................................................................... 3

4.0 Standards features .................................................................................................................... 5

4.1. Performance ................................................................................................................... 5

4.1.1 Reliability............................................................................................................ 5

4.2 Unformatted and formatted capacities ............................................................................ 6

4.3 Options (factory installed) ............................................................................................... 6

4.4 Optional accessories (user installed) .............................................................................. 6

4.5 Installation....................................................................................................................... 7

5.0 Performance characteristics..................................................................................................... 8

5.1 Internal drive characteristics (transparent to user) .......................................................... 8

5.2 SCSI drive Seek, Read and Write performance characteristics (Visible to User) ............ 8

5.2.1 Access time........................................................................................................ 8

5.2.2 Format drive command ex ecution time............................................................... 9

5.2.3 Read data command ex ecution time................................................................... 9

5.2.4 Write data command execution time................................................................... 9

5.3 Generalized performance characteristics........................................................................ 10

5.3.1 Notes for sections 5.2 and 5.3 ............................................................................ 11

5.4 Start/stop time ................................................................................................................ 12

5.5 Prefetch/multi segmented cache control ......................................................................... 12

5.5.1 Cache operation ................................................................................................. 12

5.5.2 Prefetch operation .............................................................................................. 13

5.6 Caching write data .......................................................................................................... 14

6.0 Reliability specifications ........................................................................................................... 15

6.1 Error rates....................................................................................................................... 15

6.1.1 Read errors........................................................................................................ 15

6.1.2 Environmental interf erence ................................................................................ 15

6.1.3 Write errors ........................................................................................................ 16

6.1.4 Seek errors ........................................................................................................ 16

6.2 Reliability and service ..................................................................................................... 16

6.2.1 Mean time between failure ................................................................................. 16

6.2.2 Prev entive maintenance..................................................................................... 16

6.2.3 Service life ......................................................................................................... 16

6.2.4 Service philosophy............................................................................................. 17

6.2.5 Installation.......................................................................................................... 17

6.2.6 Service tools ...................................................................................................... 17

6.2.7 Product Warranty ............................................................................................... 17

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T able of contents

7.0 Physical/electrical specifications ............................................................................................. 18

7.1 AC pow er requirements .................................................................................................. 18

7.2 DC power requirements .................................................................................................. 18

7.2.1 Conducted noise immunity................................................................................. 19

7.2.2 Po wer sequencing.............................................................................................. 19

7.2.3 12 V - current profile........................................................................................... 19

7.3 Heat/power dissipation.................................................................................................... 20

7.4 Environmental limits........................................................................................................ 20

7.4.1 T emper ature....................................................................................................... 21

7.4.2 Relative humidity................................................................................................ 23

7.4.3 Effective altitude (sea le v el ref)........................................................................... 23

7.4.4 Shock and vibration............................................................................................ 23

7.4.5 Air cleanliness.................................................................................................... 25

7.5 Electromagnetic compatibility.......................................................................................... 25

7.5.1 Electromagnetic susceptibility ............................................................................ 25

7.6 Mechanical specifications ............................................................................................... 26

7.6.1 Drive orientation................................................................................................. 27

7.6.2 Cooling............................................................................................................... 27

7.6.3 Drive mounting................................................................................................... 27

8.0 Media characteristics ................................................................................................................ 28

8.1 Media description............................................................................................................ 28

9.0 Defect and error management .................................................................................................. 29

9.1 Drive internal defects/errors............................................................................................ 29

9.2 SCSI systems error considerations................................................................................. 29

10.0 Option/configuration headers................................................................................................... 30

10.1 Drive ID/option select header.......................................................................................... 30

10.2 Grounding....................................................................................................................... 32

11.0 Interface requirement ................................................................................................................ 33

11.1 General description......................................................................................................... 33

11.2 SCSI interface messages supported............................................................................... 33

11.3 SCSI interface commands supported ............................................................................. 34

11.3.1 Inquiry data ........................................................................................................ 36

11.3.2 Mode sense data ............................................................................................... 37

11.4 SCSI bus conditions and miscellaneous features supported........................................... 40

11.5 Synchronous data transfer.............................................................................................. 41

11.5.1 Synchronous data transfer periods supported.................................................... 41

11.5.2 REQ/ACK offset ................................................................................................. 41

11.6 Physical interface............................................................................................................ 41

11.6.1 DC cable and connector..................................................................................... 43

11.6.2 Physical characteristics...................................................................................... 43

11.6.3 Connector requirements..................................................................................... 45

11.6.4 Electrical description .......................................................................................... 49

11.7 Disc drive timing ............................................................................................................. 54

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T able of contents

12.0 Options....................................................................................................................................... 56

12.1 Front panel...................................................................................................................... 56

12.2 Single unit shipping pack ................................................................................................ 56

12.3 Installation Guide ............................................................................................................ 56

13.0 Accessories ............................................................................................................................... 57

13.1 Front panel kit ................................................................................................................. 57

13.2 Additional Installation Guide copies ................................................................................ 57

14.0 Te chnical support services....................................................................................................... 58

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1.0 Scope

This specification describes the Seagate Technology, Inc. Hawk 4 Family Disc Driv e. This high capacity, high performance member of the Seagate 3.5 inch rigid disc family is a companion product to the ST12400 drive family . It has an embedded SCSI controller . Perf ormance information is given in Section 5. The Hawk 4 F amily interface is defined for functional compatibility to a subset of the Seagate SCSI Interf ace Specification 77738479, and the ANSI SCSI-2 and SCSI-3 standards. The Model Hawk 4 Family drives are classified as “Intelligent” peripherals. The Ha wk 4 Family provides Le vel 2 conf ormance (highest level) with the ANSI SCSI-1 standard. Details of the Hawk 4 F amily drive SCSI implementation are provided in Section 11 of this specification, (V ol.

1) and in the SCSI Interface Product Manual P/N 77738479 (Vol. 2; Ver. 2). The Hawk 4 family of drives consists of the ST15230N/ND drives . From this point on in this Product Manual the ref erence to Ha wk 4 F amily is ref erred to as “the drive” (unless

reference to individual models are necessary). The drive printed circuit board is referred to as a PCB.

Figure 1-1. Hawk 4 family drive

SEAGATE

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2.0 Applicable standards and reference documentation

The drive has been developed as a system peripheral to the highest standards of design and construction. The drive depends upon its host equipment to provide adequate power and en vironment in order to achie ve optimum performance and compliance with applicable industry and governmental regulations. Special attention must be given in the areas of saf ety , power distribution, shielding, audib le noise control, and temperature regulation. In particular , the drive must be securely mounted in order to guarantee the specified performance characteristics.

2.1 Standards

The Hawk 4 Family complies with Seagate standards as noted in the appropriate sections of this specification and the Seagate SCSI Interface Specification, P/N 77738479 (Vol.2, Version 2).

The Hawk 4 F amily is a UL Recognized component per UL 1950 and a CSA Certified component per CAN/ CSA-C22.2 No. 950-M89. It also meets the requirements of DIN VDE 0805:1993 and EN60950: 1992 (IEC

950). The drive, as delivered, is designed for system integration and installation into a suitable enclosure prior to

use. As such the dr ive is supplied as a subassembly and is not subject to Subpart J of Part 15 of the FCC Rules and Regulations nor the Radio Interference Regulations of the Canadian Department of Communications. Howev er , the unit has been tested using proper shielding and grounding and found to be compliant with Class A limits of the FCC Rules and the Regulations of The Canadian Department of Communications.

The physical design characteristics of the drive serve to minimize radiation when installed in an enclosure that provides reasonable shielding. As such, the drive is capable of meeting the Class B limits of the FCC Rules and Regulations of the Canadian Department of Communication. Howe ver , it is the users responsibility to assure that the drive meets the appropriate EMI requirements in their system. Shielded I/O cab les may be required if the enclosure does not provide adequate shielding. If the I/O cab les are external to the enclosure, shielded cables should be used, with the shields grounded to the enclosure and to the host controller .

Caution. To avoid potential service problems, observe the follo wing precautions:

The Manufacturers installed labels must not be removed from the drive or covered with additional labels, as they contain inf ormation required when servicing the product.

2.2 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.

Seagate uses an independent laboratory to confirm compliance to the above directives. The drive was tested in a representative system for typical applications. The selected system represents the most popular characteristics for test platforms. The system configurations include:

• 486, Pentium, and Power PC Microprocessors • Keyboard

• 3.5-inch Floppy Disc Drive • Monitor/Display Although the test system with this Seagate model complies to the directives, we cannot guarantee that all

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

2.3 Applicable reference documents

Installation Guide Seagate P/N 77767474 Product Manual - SCSI Interface Seagate P/N 77738479 ANSI Small Computer System Interface (SCSI): Document Number ANSI3.131-1986 (X3T9/84.40 Re v. 1B) (X3T9.2/82-2 Rev. 17B), X3T9.2/86-109 Re vision 10H (SCSI-2) and X3T9.2-184 Re v. 4 (SCSI-3).

Seagate Package T est Requirements P/N 30190-001 (pac kages under 100 lbs) Seagate Package T est Requirements P/N 30191-001 (packages o v er 100 lbs)

In case of conflict between this document and any referenced document, this document shall take precedence.

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3.0 General description

The drives are a member of a family of low cost, high performance, highly reliable, random access storage devices designed to meet the needs of the OEM marketplace.

The drive records and recovers data on 3.7 inch (95 mm) fix ed discs . The drive supports the Small Computer System Interface-2 (SCSI) as described in the ANSI SCSI-1, SCSI-

2 and SCSI-3 Interface Specifications to the extent described in this product manual (Vol. 1), which defines the product performance characteristics of the Hawk 4 Family of drives, and the SCSI Interface Product Manual P/N 77738479 (Vol. 2, Version 2) which describes the general interface characteristics of this and other families of Seagate 3.5-inch drives.

The drive interface supports multiple initiators, disconnect/reconnect, self configuring host software and automatic features that reliev e the host from the necessity of knowing the physical characteristics of the targets (logical block addressing is used).

The Head/Disc Assembly (HDA) is environmentally sealed at the factory. Air recirculates within the HDA through a nonreplaceable filter to maintain a contamination free head/disc environment.

Refer to Figure 3.0-1 for an e xploded view of the drive . NEVER disassemble the Head/Disc Assembly (HD A). This exploded view is f or information only . Do not attempt to service items in the sealed environmental enclosure (heads, media, actuator , etc.) as this requires special facilities . The driv e contains no parts replaceable by the user . The drive w arranty is voided if the HDA is opened.

The Hawk 4 Family driv es use a dedicated landing zone at the innermost radius of the media to eliminate the possibility of destroying or degrading data by landing in the data zone. The drive automatically goes to the landing zone when the power is remov ed.

The Hawk 4 Family drives incor porate an automatic shipping lock which prevents potential damage to the heads and discs that result from movement during shipping and handling. The shipping lock disengages when power is applied to the drive and the head load process begins.

The Hawk 4 F amily drives decode Tr ack 0 location from the dedicated servo surface to eliminate mechanical transducer adjustments and related reliability concerns.

The Hawk 4 F amily drives use a high performance actuator assembly that consists of a low inertia, balanced, patented, straight arm design that provides excellent performance with minimum pow er dissipation.

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Figure 3.0-1. Hawk 4 family drive

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4.0 Standard features

The Hawk 4 F amily has the f ollo wing standard f eatures:

• Integrated SCSI Controller

• Single Ended and Differential SCSI drivers and receivers

• Asynchronous and Synchronous data transfer protocol

• Firmware downloadable via SCSI interf ace

• Selectable sector size from 256 to 4096 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)

• 96 bit Reed-Solomon error correcting code

• Sealed Head/Disc Assembly

• No preventative maintenance or adjustment required

• Dedicated head landing zone

• Automatic shipping lock

• Automatic Adaptive Thermal Compensation

• Patented Tri-Phase Servo with embedded Grey Code track address to guarantee servo positioning.

• Self diagnostics performed at power on

• 1:1 Interleave

• Zoned Bit Recording (ZBR)

• Vertical, horizontal, or top down mounting

• Dynamic spindle brake

• 512 K byte data buffer

• Permanently mounted terminators (for model ST15230N only), enabled by installation of a jumper plug.

4.1 Performance

• Programmable multi-segmentable cache buffer

• 5411 r/min Spindle. Av er age latency = 5.54 ms

• Command Queuing of up to 64 commands per initiator

• Background processing of queue

• Supports start and stop commands

• Low audible noise for office environment

• Low power consumption

4.1.1 Reliability

• 800,000 hour MTBF

• Adaptive seek velocity. Improved seek perf ormance

• LSI circuitry

• Balanced low mass rotary voice coil actuator

• 5 year warranty

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4.2 Unformatted and formatted capacities

Formatted capacity depends on the number of spare reallocation sectors reserved and the number of bytes per sector. The follo wing tab le shows some

Spare sectors or cylinders N/ND reserved for reallocation MB

No spares 4319 4596 Twelve spare sector per cylinder [2] 2 spare cylinders per Unit [3] 4294 4546 One spare sector per cylinder 2 spare cylinders per Unit [3] 4315 4590 Unformatted capacity 5170

Notes.

[1] Bytes per sector. Sector size selectable at format 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. User available capacity depends on spare reallocation scheme selected. See Mode

Select Command and Format Command in the SCSI Interface Product Manual P/N 77738479. [2] All twelve spare sectors are on one track. [3] Spare cylinders are on the two inner tracks.

typical

formatted capacities.

512 [1] 1024 [1]

The standard OEM model is as follows:

Formatted Data Block Size* Unformatted 512 Byte/Sector

ST15230N/ND 4294 MB 5170 MB *Twelve spare sectors per cylinder (all twelve spare sectors are on one track), two spare cylinders/unit. Drives are shipped with an Installation Guide P/N 77767474 unless otherwise specified.

4.3 Options (factory installed)

The capacities shown in paragraph 4.2 are av ailable upon request. Other capacities can be ordered depending on sparing scheme and sector size requested.

The following options are incorporated at the time of production. See Section 12.0.

• Front panel (green LED) - See Figure 3.0-1

• Single Unit shipping pack

• Installation Guide P/N 77767474

4.4 Optional accessories (user installed)

The following accessories are av ailab le . All kits may be installed in the field. See Section 13.0.

• Front Panel Kit (with green LED) - See Figure 3.0-1

• Single Unit shipping pack kit

• Adapter Accessory Frame Kit P/N 75790701 (adapts 3.5-inch drive to fit in 5.25-inch drive mounting

space)

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4.5 Installation

For option jumper locations and definitions refer to Figure 10.1-1. Drive default mode parameters are not normally needed for installation. Refer to Section 11.3.2 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

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

the bus.

• If the drive is the only device on the bus, attach it to the end of the SCSI bus cable . Permanently installed

terminators must be enabled on the drive for ST15230N models using a jumper plug (see Figure 10.1-1), For the ST15230ND model, terminators must be installed external to the drive. These e xternal terminators must be provided by the user , systems integrator or host equipment manuf acturer . Ref er to section 11.6.4.3.

• If the drive is attached to a bus that contains other de vices , and the new drive is not attached to the end of

the bus, the terminator enable jumper should be removed from the ne w drive .

• 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 mak e the ne w settings effective.

• Installation instructions are provided by host system documentation or with any additionally purchased

drive installation software. If necessary see section 14.0 for Seagate support services telephone numbers.

• The manufacturers installed labels must not be removed from the drive or co vered with additional labels, as

they contain information required when servicing the product.

Formatting

• It is not necessary to low level f ormat this drive. The drive is shipped from the f actory low le vel formatted in

512 byte sectors.

• Reformat the drive if one of the following occurs.

- A different sector size is selected.

- A different spare sector allocation scheme is selected.

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5.0 Performance characteristics

5.1 Internal drive characteristics (transparent to user)

Drive Capacity 5170 MByte (UNF) Read/Write Heads 19 Bytes/Track 68155 Bytes (UNF, Avg) Bytes/Surface 272 Mbytes (UNF) Tracks/Surface , T otal 3992 Tracks (user accessible) Tracks/Inch 4200 TPI Servo Heads 1 1 Internal Data Rate 33.9 to 61.0 Mbits/sec (v ariable with z one) Disc Rotational Speed 5411 +0.5% r/min Aver age Rotational Latency 5.54 ms

5.2 SCSI Seek, Read and Write performance characteristics (visible to user) [8]*

Refer to Section 11.7 and to the SCSI-2 Interface Product Man ual 77738479 for additional timing details .

5.2.1 Access time

Includes Controller Overhead with no Disconnects [1] [4]

Read Write

Average - Typical [3] 10.4 11.4

Max. [2] 11.9 13.4

Single T rack- T ypical [3] 2.1 2.5

Max. [2] 3.8 4.3

Full Stroke - Typical [3] 20.6 21.4

Max. [2] 23.9 24.9

*[ ] All notes are listed in section 5.3.1.

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5.2.2 Format drive command execution time (minutes) [1]

Maximum (with verify) 70 Min. Maximum (no verify) 45 Min

5.2.3 Read data command execution time [4]

(512 byte sector size, without disconnect and with read look ahead cache disabled.) Latency time is included.

a. From CDB reception to the drive request f or the first data byte to be transferred to the Host

1. Typical (Zero Stroke Seek) 7.32 ms [3]*

2. Typical (Av er age Seek) 16.84 ms [3]

3. Maximum (Full Stroke Seek) 31.38 ms [2]

b. Single Sector Read and Transfer of data to Host (time from receipt of last byte of the CDB to the request

for a status byte transfer to Host) [7].

1. Typical (Zero Stroke Seek) 7.42 ms [3]

2. Typical (Av er age Seek) 16.95 ms [3]

3. Maximum (Full Stroke Seek) 31.49 ms [2]

5.2.4 Write data command execution time [4]

(512 byte sector size, without disconnect and with read look ahead disabled.) Latency time is included.

a. From CDB reception to the request f or the first b yte of write data from the Host.

1. Typical 1.49 ms 2. Maximum 1.61 ms

b. Single Sector Write and Data Transfer from Host [7] [6]

(Time from receipt of the last byte of the CDB to the request for a completion status transf er to the Host)

1. Typical (Zero Stroke Seek) 7.72 ms [3]

2. Typical (Av er age Seek) 17.10 ms [3]

3. Maximum (Full Stroke Seek) 31.93 ms [2]

*[ ] All notes are listed in Section 5.3.1.

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5.3 Generalized performance characteristics

Minimum Sector Interleave 1 to 1 Data Buffer To/From Disc Media

Data transfer rate (< 1 sector) - 512 Byte Sector Min. [4]* 4.33 MByte/sec

Avg. [4] 6.15 MByte/sec Max. [4] 7.63 MByte/sec

Data Buffer To/From Disc Media

Data Transfer Rate (< 1 T r ac k) - 512 Byte Sector

Min. [4] 3.64 MByte/sec divided by (Interleave Factor) Avg. [4] 5.16 MByte/sec divided by (Interleave F actor) Max. [4] 6.41 Mbyte/sec divided by (Interleav e Factor)

SCSI Interface Data Transfer Rate (Asynchronous) [5]

ST15230N ST15230ND

-Maximum Instantaneous 5.2 MBytes/sec [9]* 3.3 MBytes/sec

-Maximum A v erage 3.1 MBytes/sec [11] 2.4 MBytes/sec

Sector Sizes 512 user data blocks (default)

Variable (256 to 4096 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.

Synchronous T ransfer Rate

From 1.25 MByte/sec to 10.0 MBytes/sec (See section 11.5.) Read/Write consecutive sectors on a track Yes Flaw reallocation performance impact (For fla ws reallocated using the spare Negligible

sectors per track reallocation scheme.) [10] Flaw reallocation performance impact (For fla ws reallocated using the spare Negligible

sectors per cylinder reallocation scheme.) [10] Flaw reallocation performance impact (For flaws reallocated using the spare trac ks 35 ms (typical)

per volume reallocation scheme.) Overhead time for head switch (512 byte sectors) 1 ms Overhead time for one trac k cylinder switch <3 ms Typical Aver age rotational latency 5.54 ms * [ ] All notes are listed in Section 5.3.1.

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5.3.1 Notes for sections 5.2 and 5.3.

[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] Maximum times are specified over the worst case conditions of temperature, v oltage margins and driv e

orientation. When comparing specified access times, care should be taken to distinguish between typical access times and maximum access times. The best comparison is obtained by system benchmark tests conducted under identical conditions. Maximum times do not include error reco v ery.

[3] Typical Access times are measured under nominal conditions of temperature, voltage, and horizontal

orientation as measured on a representative sample of drives. [4] Assumes no errors and no sector has been relocated. [5] Rate measured from the start of the first sector transfer to or from the Host. [6] Assumes the Initiator immediately sends Write Data to the drive when requested. [7] Command execution requires a data tr ansfer phase (data to or from the disc media). Assumes the initia-

tor is instantly ready to send/receive the data when the drive generates first request for a data byte

transfer, and assumes an average data transfer rate between the drive and the Initiator as specified in

section 5.3. [8] All performance characteristics assume that automatic adaptive temperature compensation is not in

process when the SCSI command is received. The following par ag raphs give highlights of thermal cali-

bration operation.

a. At spin-up, all heads are calibrated on the outer and inner diameter calibration tr ac ks.

b. A timed calibration occurs 1 minute after spin-up, and every 10 minutes thereafter. During these

timed calibrations, the firmware alternates between the inner and outer diameter calibration tracks. For example, all heads are calibrated on the inner track, then 10 minutes later all heads are calibrated on the outer track. Automatic adaptive temperature calibration does not interrupt SCSI commands being executed.

c. If automatic adaptive thermal calibration is in process when the drive receives a SCSI command, the

drive queues the command until the compensation for the specific head being compensated completes. When compensation completes f or the specific head being compensated, the drive e xecutes the first queued command. When execution of the first queued command completes, the drive continues compensation for the remaining head(s). The abov e procedure contin ues until the drive completes compensation for all heads.

d. When a timed calibration comes due, the drive postpones the calibration until the drive has been idle

for 25 to 50 milliseconds.

e. When the drive receives a Write command, the drive perf orms a single head calibration if a calibra-

tion has been delayed f or 1 to 5 minutes. The driv e performs an uninterruptible calibration of all heads if the calibration has been delayed more than 5 minutes .

f. The drive preforms a calibration of all heads prior to the first retr y of any media error if a timed

calibration has been delayed f or o v er one minute . g. Automatic adaptive temperature compensation tak es less than 0.1% of b us time. h. Automatic adaptive temperature compensation occurs at times other than mentioned above, but

should be transparent to the user (e.g., during execution of Format, Rezero, and Reassign Block

commands). i. A rezero command can be used to reset the Automatic adaptive temperature compensation timer

back to start so that the host can know when the interruption for timed thermal compensation will

occur.

[9] Assumes system ability to support 5.2 Mb/s and no cable loss. [10]Simulated. [11]Assumes Typical host delays and cable losses.

_________ *SCSI Interface commands described in SCSI Interface Manual 77738479.

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5.4 Start/stop time

After DC power has been applied, the drive becomes ready within 25 seconds if the Motor Start Option is disabled (i.e. the motor starts as soon as the power has been applied). During this time the drive responds to some commands over the SCSI interface* in less than 3 seconds. Stop time is 20 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 25 seconds . The Motor Start Command can also be used to command the drive to stop the spindle*.

There is no power control switch on the drive .

5.5 Prefetch/multi-segmented cache control

The drive provides prefetch (read look-ahead) and multi-segmented cache control algorithms that in many cases can enhance system performance. “Cache” as used herein refers to the drive buffer storage space when it is used in “cache” oper ations. To select prefetch and cache features the host sends the Mode Select command with the proper values in the applicable bytes in Mode Page 08h*. Prefetch and cache operation are independent features from the standpoint that each is enabled and disab led independently via the Mode Select command. Ho wev er, in actual operation the pref etch feature overlaps cache oper ation somewhat as is noted in sections 5.5.1 and 5.5.2.

All default cache and prefetch Mode par ameter values (Mode Page 08h) for standard OEM versions of this drive family are giv en in Tables 11.3.2-1 through 11.3.2-4.

5.5.1 Cache operation

In general, 448 Kbytes of the 512 Kbytes of ph ysical buff er space in the driv e can be used as storage space for cache operations. The buffer can be divided into logical segments (Mode Select P age 08h, byte 13) from which data is read and to which data is written. The drive maintains a table of logical block disk medium addresses of the data stored in each segment of the buffer. If cache operation is enabled (RCD bit = 0 in Mode Page 08h, byte 2, bit 0. See SCSI Interface Product Manual*), data requested by the host with a Read command is retrieved from the buffer (if it is there), before any disc access is initiated. If cache operation is not enabled, the buff er (still segmented with required number of segments) is still used, but only as circular buffer segments during disc medium read operations (disregarding Prefetch operation f or 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 retriev ed data merely passes through some buff er segment on the way to the host. On a cache "miss", all data transfers to the host are in accordance with “buffer-full” ratio rules. On a cache

"hit" the drive ignores the "buffer full" r atio rules. See explanations associated with Mode page 02h (discon-

nect/reconnect control) in the SCSI Interface Product Manual*. The following is a simplified description of a read operation with cache operation enab led: Case A - A Read command is received and the first logical block (LB) is already in cache:

1. Drive transfers to the initiator the first LB requested plus all subsequent contiguous LB’s that are already in the cache. This data may be in multiple segments.

2. When the requested LB is reached that is not in any cache segment, the drive fetches it and any remaining requested LB’s from the disc and puts them in a segment of the cache. The driv e transfers the remaining requested LB’s from the cache to the host in accordance with the disconnect/reconnect specification mentioned above.

3. If the prefetch feature is enab led, ref er to section 5.5.2 f or oper ation from this point.

_________ *SCSI Interface Product Manual P/N 77738479.

Product Manual - ST15230 Family SCSI-2 (Volume 1), Rev. F 13 ______________________________________________________________________________________

Case B - A Read command requests data, the first LB of which is not in any segment of the cache:

1. The drive fetches the requested LB’ s from the disc and transf ers them into a segment, and from there to

the host in accordance with the disconnect/reconnect specification referred to in case A.

2. If the prefetch feature is enab led, ref er to section 5.5.2 f or operation from this point.

Each buffer segment is actually a self-contained circular stor age (wraparound occurs), the length of which is an integer number of disc medium sectors. The wraparounds capability of the individual segments greatly enhances the buffer’s overall performance as a cache storage, allowing a wide range of user selectable configurations, which includes their use in the prefetch operation (if enab led), e ven when cache operation is disabled (see section 5.5.2). The the

size

can not be directly selected. specification. The siz e in Kbytes of each segment is reported by the Mode Sense command page 08h, bytes 14 and 15. If a size specification is sent by the host in a Mode Select command (bytes 14 and 15) no new segment size is set up by the drive, and 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 unchangeab le parameters (see SCSI I/O Product Manual*). The ST15230 family of drives supports operation of any integer number of segments from 1 to 16.

5.5.2 Prefetch operation

If the Prefetch feature is enab led, data in contiguous logical blocks on the disc immediately be yond that which was requested by a Read command can be retriev ed and stored in the buff er for immediate transf er 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”. Prefetch is enabled using Mode Select page 08h, byte 12, bit 5 (Disable Read Ahead - DRA bit). DRA bit = 0 enables prefetch. Since data that is prefetched replaces data already in some buff er segment(s), the host can limit the amount of prefetch data to optimize system performance. The max prefetch field (b ytes 8 and 9 of Mode parameters page 08h) limits the amount of prefetch. The drive does not use the prefetch "ceiling" field (b ytes 10 and 11).

number

Size

of segments may be selected using the Mode Select command, but

is selected only as a by-product of selecting the segment

number

During a prefetch operation, the drive crosses a cylinder boundary to fetch more data (DISC) bit is set to one in bit 4 of byte 2 of Mode parameters page 08h.

Whenever pref etch (read look-ahead) is enabled (enab led by DRA = 0), it operates under the control of ARLA (Adaptive Read Look-Ahead). If the host uses software interleave, ARLA enables prefetch of contiguous blocks from the disk when it senses that a prefetch "hit" will lik ely occur, even if two consecutive read operations were not for physically contiguous blocks of data (e.g. "software inter leave"). ARLA disables prefetch when it decides that a prefetch "hit" will not likely occur . If the host is not using software interleave, and if two sequential read operations are not for contiguous blocks of data, ARLA disables prefetch, but as long as sequential read operations request contiguous blocks of data, ARLA k eeps prefetch enab led.

__________ *SCSI Interface Product Manual, P/N 77738479.

only

if the Discontinuity

14 Product Manual - Hawk 4 Famil y SCSI-2 (Volume 1), Rev. F ______________________________________________________________________________________

5.6 Caching write data

Write caching is a write operation by the drive that makes use of a drive buff er storage area where the data to be written to the medium is stored in one or more segments while the drive performs the write command.

Write caching is enabled along with read caching. For write caching, 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 whether or not read and write caching is enabled or disabled. When a write command is issued, the cache is first checked to see if any logical b locks 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 data logical blocks exceeds the siz e of the segment being written into when the end of the segment is reached, the data is written into the beginning of the same cache segment, overwriting the data that was written there at the beginning of the operation. Howe ver , the drive does not o verwrite data that has not yet been written to the medium.

Tables 11.3.2-1 and 11.3.2-2 show Mode default settings f or the Ha wk 4 f amily of driv es.

Product Manual - Hawk 4 Family SCSI-2 (Volume 1), Rev. F 15 ______________________________________________________________________________________

6.0 Reliability specifications

The following reliability specifications assume correct host/drive operational interf ace, including all interf ace timings, power supply v oltages, and en vironmental requirements.

Seek Errors Less than 1 in 107 seeks Read Error Rates [1]

Unrecovered Data Less than 1 sector in 10

Miscorrected Data Less than 1 sector in 10 MTBF 800,000 hours Service Life 5 years Preventiv e Maintenance None required

Note. [1]Error rate specified with automatic retr ies and data correction with ECC enabled and all flaws

reallocated.

6.1 Error rates

The error rates stated in this specification assume the following: a. The drive is operated per this specification using DC Po wer as defined in this specification (see Section

7.2). b. The drive has been formatted with the SCSI FORMAT commands. c. Errors caused by media defects or host system failures are excluded from error rate computations . Refer

to Paragraph 8.0, Media Characteristics.

bits transferred

6.1.1 Read errors

Before determination or measurement of read error rates: a. The data that is to be used for measurement of read error rates must be v erified as being written correctly

on the media.

b. All media defect induced errors must be e xcluded from error rate calculations .

6.1.2 Environmental interference

When evaluating systems operation under conditions of Electromagnetic Interf erence (EMI), the performance of the drive within the system shall be considered acceptable if the drive does not generate an unrecov erable condition.

An unrecoverable error, or condition, is defined as one that:

1. Is not detected and corrected by the drive itself;

2. Is not capable of being detected from the error or fault status pro vided through

the drive or SCSI interface; or

3. Is not capable of being recovered b y normal drive or system recov ery

procedures without operator intervention.

16 Product Manual - Hawk 4 Family SCSI-2 (Volume 1), Rev. F ______________________________________________________________________________________

6.1.3 Write errors

Write errors can occur as a result of media defects, environmental interference, or equipment malfunction. Therefore, write errors are not predictable as a function of the number of bits passed.

If an unrecoverable write error occurs because of an equipment malfunction in the driv e, the error is classified as a failure affecting MTBF. Unrecoverable write errors are those which cannot be corrected within two attempts at writing the record with a read verify after each attempt (excluding media defects).

6.1.4 Seek errors

A seek error is defined as a failure of the drive to position the heads to the addressed trac k. There shall be no more than one recoverable seek error in 107 physical seek operations. After detecting an initial seek error, the drive automatically reseeks to the addressed track up to 3 times. If a reseek is successful, the Extended Sense reports a seek positioning error (15h), no seek complete error (02h), or track follow error (09h), and the sense key reports a recovered error (1h). If all three reseeks fail, a seek positioning error (15h) is reported with a Medium (3h) or Hardware error (4h) reported in the Sense Key. This is an unrecoverable seek error. Unrecoverable seek errors are classified as failures for MTBF calculations. Ref. section 5.1.1.2 of SCSI-2 Interface Product Manual P/N 77738479.

6.2 Reliability and service

6.2.1 Mean time between failure

The production disc drive shall achieve an MTBF of 800,000 hours when operated in a benign atmosphere at an average disc drive ambient temperature of 95°F (35°C) or less as measured per this Product Specification, paragraph 7.4.1. Short term excursions up to the specification limits of the operating environment will not affect MTBF performance. The following expression defines MTBF:

MTBF per measurement period =

Estimated power-on operation hours means power-up hours per disc drive times the total number of disc drives in service. Each disc drive shall have accumulated at least nine months of operation. Data shall be calculated on a rolling average base f or a minimum period of six months.

Drive failure means any stoppage or substandard performance caused by drive malfunction.

6.2.2 Preventive maintenance

No routine scheduled preventiv e maintenance shall be required.

6.2.3 Service life

The drive shall have a useful service life of fiv e years. Depot repair or replacement of major parts is permitted during the lifetime (6.2.4).

Estimated power-on operating hours in the period Number of drive failures in the period

Product Manual - Hawk 4 Family SCSI-2 (Volume 1), Rev. F 17 ______________________________________________________________________________________

6.2.4 Service philosophy

Special equipment is required to repair the drive HDA. In order to achie ve the abov e service life, repairs must be performed only at a properly equipped and staffed service and repair facility . T roub leshooting and repair of PCBs in the field is not recommended, because of the extensive diagnostic equipment required f or effectiv e servicing. Also , there are no spare parts available for this drive . Drive warranty is voided if the HD A is opened.

6.2.5 Installation

The drive is designed, manufactured, and tested with a “Plug in and Play” installation philosophy. This philosophy minimizes the requirements f or highly trained personnel to integrate the drive into the OEM’ s system, whether in a factory or field environment.

The drive has been low lev el formatted at the factory and should not be reformatted, unless the sector size or sparing allocation scheme is changed.

6.2.6 Service tools

No special tools are required for site installation or recommended for site maintenance . Refer to Par a gr aph

6.2.4. The depot repair philosophy of the drive precludes the necessity for special tools. Field repair of the drive is not practical since there are no user purchasable parts in the drive.

6.2.7 Product Warranty

Beginning on the date of shipment to customer and continuing for a period of 5 years, Seagate w arrants that each product (including components and subassemblies) or spare part that fails to function properly under normal use due to defect in materials on workmanship or due to non conformance 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 repaired or replacement item to customer. For more detailed warranty information refer to the Standard terms and conditions of Purchase for Seagate products.

Shipping:

When transporting or shipping a drive, a Seagate approved container must be used. Keep the 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 the 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.

18 Product Manual - Hawk 4 Family SCSI-2 (Volume 1), Rev. F ______________________________________________________________________________________

7.0 Physical/electrical specifications

7.1 AC power requirements: None

7.2 DC Power requirements

The voltage and current requirements for a single drive are shown in the following table. Values indicated apply at the drive power connector .

Table 7.2-1. DC power requirements

Single Ended Differential V oltage +5 V +12 V +5 V +12 V Regulation [4][2] +5% +5% +5% +5% Aver age Idle Current [1] 0.36 A 0.54 A 0.51 A 0.54 A Maximum Starting Current

(Peak) [5][2][6] 0.61 A 2.4 A 0.71 A 2.4 A Delayed Motor Start (Max) [3] [5] 0.56 A 0.22 A 0.56 A 0.22 A Operating Current [6]

Typ. [1] 0.8 A 0.62 A 0.9 A 0.62 A Max. [1] 0.85 A 1.0 A 1.05 A 1.0 A Max. (Peak) 1.1 A 2.0 A 1.3 A 2.0 A

[1] Measured with average reading DC ammeter. Instantaneous +12 V currentpeaks will exceed these val-

ues. [2] A droop of up to -10% is permissible during the T2 portion of power up (see Figure 7.2.2-1). [3] This condition occurs when the Motor Start Option is enabled and the drive has not yet received a Start

Motor command. [4] See paragraph 7.2.1 “Conducted Noise Immunity”. [5] Peaks of 0.90 A (nominal) on +12 V will occur for no more than 100 ms total during the first 250 ms after

power is applied. [6] Instantaneous peaks in excess of these values and less than 5 msec. in duration are allowed.

General Notes from Table 7.2-1:

1. At power-up, the motor current regulator limits the 12 volt current to a peak value of less than 2.4 am-

peres, although instantaneous peaks may exceed this value. These peaks should measure 5 msec.

duration or less.

2. Operating condition is defined as Random Seek Reads of 64 blocks.

3. Minimum current loading for each supply voltage is not less than 30% of the maximum oper ating current

shown.

4. The +5 and +12 volt supplies shall employ separate g round returns.

5. 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 starting current must be available to each device .

Product Manual - Hawk 4 Family SCSI-2 (Volume 1), Rev. F 19 _______________________________________________________________________________________

7.2.1 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 = 150 mV pp from 0 to 50 kHz and 45 mA pp from 50 kHz to 10 mHz. +12 V = 150 mV pp from 0 to 50 kHz and 60 mA pp from 50 kHz to 10 mHz.

7.2.2 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 maintained on the terminated drive to ensure proper termination of the peripheral I/O cables.

7.2.3 12 V - current profile

Figure 7.2.2-1 identifies the drive +5 V and +12 V current profile. The current during the various times is as shown:

T - Power is applied to the drive. T1 - Controller self tests are performed. T2 - Spindle begins to accelerate under current limiting after performing internal diagnostics. See Note 1

of Table 7.2-1. T3 - The spindle is up to speed and the Head-Arm restraint is unlocked. T4 - The heads move from the landing zone to the data area. T5 - The adaptive calibration sequence is performed. T6 - Calibration is complete and the drive is ready for reading and writing.

20 Product Manual - Hawk 4 Family SCSI-2 (Volume 1), Rev. F ______________________________________________________________________________________

Note. All times and currents are typical. See Table 7.2-1 for maximum current requirements .

1.0

12V

2.0

1.5

02468

Seconds

10 12 14 16 18

Current

(amps)

CH1 GND

Current

(amps)

CH2 GND

Figure 7.2.2-1. Typical Hawk 4 family drive +5 V +12 V current profile

Power Save Cut-in

Channel 1 2 s .5 Amps

Channel 2 2 s .5 Amps

7.3 Heat/power dissipation

For drives with single ended interf ace circuits, typical operating pow er dissipation is 11 watts (37.7 BTUs per hour) of DC power average at nominal voltages. Typical power dissipation under idle conditions is 9 watts (30.8 BTUs per hour).

For drives having diff erential interface circuits, typical oper ating power dissipation is 12 watts (41.1 BTUs per hour) of DC power aver age at nominal voltages. Typical power dissipation under idle conditions is 9.5 watts (32.5 BTUs per hour).

7.4 Environmental limits

Temperature and humidity values experienced by the driv e m ust 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). Maxim um Wet Bulb temperature is 82°F (28°C).

Product Manual - Hawk 4 Family SCSI-2 (Volume 1), Rev. F 21 ______________________________________________________________________________________

7.4.1 Temperature

a. Operating

The drive meets all specifications over a 41°F to 131°F (5°C to 55°C) drive ambient temperature r ange with a maximum gradient of 36°F (20°C) per hour. The enclosure for the drive should be designed such that the temperatures at the locations specified in T able 7.4.1-1, column 1 are not exceeded. Air flow ma y be needed to achieve these temperature values. Operation at case temperatures above these values may adversely aff ect the drives ability to meet specifications .

The MTBF specification for the drive is based on operating at an ambient temperature of 95°F (35°C). Occasional excursions to drive ambient temperatures of 55°C or 5°C ma y occur without impact to specified MTBF. To achieve the specified MTBF, the values of Table 7.4.1-1 Column 2 must be considered maximum average operating case temper atures. Air flow ma y be needed to achieve these temperatures. Continual or sustained operation at case temperatures above these v alues ma y degrade MTBF.

Table 7.4.1-1. PCB and HDA temperatures

Items Column 1 Column 2 [1]

in Maximum Case T ypical Case

Figure Temperatures (°C) Temperatures (°C)

7.4.1-1 Operating 55°C Ambient [2] at 35°C Ambient [1]

U2 88 70

U31 100 61

U17 101 60

U5 98 61

U3 91 56

HDA 65 45 Notes:

[1] The temperatures shown in Column 2 were measured on an unmounted drive lying on its side during

random write/reads at 100% duty cycle in still air.

[2] The temperatures in Column 1 are calculated and may not reflect actual operating values. Sufficient

cooling air may be required to ensure that these values are not e xceeded.

b. Non-Operating

-40° to 158°F (-40° to 70°C) package ambient with a maximum gradient of 45°F (25°C) per hour. This specification assumes that the drive is packaged in the shipping container designed by Seagate f or use with the drive.

22 Product Manual - Hawk 4 Family SCSI-2 (Volume 1), Rev. F _____________________________________________________________________________________

HDA

SEAGATE

Model ST15230N

Single Ended I/O PCB

U15

U16

U2Ø

U11

U1Ø

U17

U31

U25

Model ST15230ND

Q13

Q1 Q2

Bottom side of PCB.

Differential I/O PCB

U15

U17

U31

U13 U14

U16

U2Ø

U11

U25

Q13

Q1 Q2

Figure 7.4.1-1. Locations of components listed in Table 7.4.1-1

Product Manual - Hawk 4 Family SCSI-2 (Volume 1), Rev. F 23 ______________________________________________________________________________________

7.4.2 Relative humidity

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

8% to 80% relative humidity with a maximum gradient of 10% per hour.

b. Non-Operating

5% to 95% relative humidity.

7.4.3 Effective altitude (Sea level reference)

a. Operating

-1000 to +10,000 feet (-305 to +3048 metres)

b. Non-Operating

-1000 to +40,000 feet (-305 to +12,210 metres)

7.4.4 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, resonance’s may occur internally to the enclosure resulting in drive movement in excess of the stated limits. If this situation is apparent, 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 b y any of the four methods shown in Figure 7.4.4-1. Orientation of the side nearest the LED may be up or down.

7.4.4.1 Shock

a. Operating

The drive, as installed for normal operation, shall operate error free while subjected to intermittent shock not exceeding 10 g’ s at a maximum duration of 11 ms (half sine wa v e). Shoc k may be applied in the X, Y, or Z axis.

b. Nonoperating

The limits of nonoperating 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 60 g’s at a maximum duration of 11 ms (half sinewav e) shall not e xhibit de vice damage or perf ormance degradation. Shock may be applied in the X, Y, or Z axis.

c. 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 pac kage requirements ref er to Seagate specifications 30190-001 (under 100 lbs) or 30191-001 (over 100 lbs).

Packaged/Pr oduct

Package Size (Cu.In.) Weight lb. (kg) Drop Height in. mm

<600 Any 60 (1524) 600-1800 0-20 (0 to 9.1) 48 (1219) >1800 0-20 (0 to 9.1) 42 (1067) >600 20-40 (9.1 to 18.1) 36 (914)

24 Product Manual - Hawk 4 Family SCSI-2 (Volume 1), Rev. F ______________________________________________________________________________________

SEAGATE

Y X

Figure 7.4.4-1. Recommended mounting

Product Manual - Hawk 4 Family SCSI-2 (Volume 1), Rev. F 25 _____________________________________________________________________________________

7.4.4.2 Vibration

a. Operating

The drive, as installed for normal operation, shall operate error free while subjected to continuous vibration not exceeding

5-22 Hz @ 0.02 inches (0.51 mm) displacement

22-400 Hz @ 0.5 g

Vibration may be applied in the X, Y, or Z axis.

b. Nonoperating

The limits of nonoperating 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 @ 0.081 inches (2.05 mm) displacement

22-400 Hz @ 2.00 g’s

Vibration may be applied in the X, Y, or Z axis.

7.4.5 Air cleanliness

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

7.5 Electromagnetic compatibility

7.5.1 Electromagnetic susceptibility

As a component assembly , the drive is not required to meet an y susceptibility performance requirements. It is the responsibility of the system integrator to perform those tests required to ensure that equipment operating in the same system as the drive does not adversely affect the performance of the drive. See section 6.1.2, and see Table 7.2-1, DC Po wer Requirements .

26 Product Manual - Hawk 4 Family SCSI-2 (Volume 1), Rev. F ______________________________________________________________________________________

7.6 Mechanical specifications

The following

nominal

dimensions are exclusive of the decorativ e front panel accessory. Ref er to Figure 7.6-

1 for detailed mounting configuration dimensions. See section 7.6.3, Drive mounting. Height: 1.62 in 41.1 mm

Width: 4.00 in 101.6 mm Depth: 5.74 in 145.8 mm Weight: 2.1 pounds 0.93 kilograms

[4]

[3]

[1]

[2]

Notes:



Mounting holes three on each side, 6-32 UNC.

[1]

Max screw length into side of drive 0.15 in. (3.81 mm).



Screw tightening torque 6.0 in-lb (.6750 NM) max



with minimum thread engagement of 0.12 in. 



(3.00 mm).



Mounting holes four on bottom, 6-32 UNC. Max

[2]

screw length into bottom of drive 0.20 in. (5.08 mm).



Screw tightening torque 6.0 in-lb (.675 NM) max



with minimum thread engagement of 0.12 in. 



(3.00 mm).



Power and interface connections can extend past 

[3]

the "A" dimension by 0.040 in. (1.02 mm).

Inches Millimeters

5.74 

4.00 

1.62 

2.362 .620

4.000 .250

1.750

3.750

2.370

1.725

4.100

0.19 

0.015

± ±

+ –



± ± ±

+ –



± ± ± ± ± ±

max

A

[4]

Figure 7.6-1. Mounting configuration dimensions for “N/ND” model drives

B C

 D E F G

 H

J K L

M N

0.010

0.026

0.010

0.005

0.010

0.010

145.80 

101.60 

41.15 

60.00 

15.75 

101.60 

6.35 

44.45 

95.25 

60.20 

43.82 

104.14 

4.83 

0.381

± ±

+ –



± ± ±

+ –



± ± ± ± ± ±

max

.25 .25 .66 .25 .25 .25 .25 .25 .12 .25 .25 .25 .25 .25 .25

Product Manual - Hawk 4 Family SCSI-2 (Volume 1), Rev. F 27 ______________________________________________________________________________________

7.6.1 Drive Orientation

The balanced rotary arm actuator design of the dr ive allows it to be mounted in any orientation. All drive performance characterization, howev er, 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.

7.6.2 Cooling

Cabinet cooling must be designed by the customer so that the ambient temperature immediately surrounding the drive will not exceed temperature conditions specified in 7.4.1. Specific consideration should be given to make sure adequate air circulation is present around the PCBs to meet the requirements of 7.4.1. Cables should be routed such that they do not block cooling air flo w.

7.6.3 Drive Mounting

When mounting the drive using the bottom holes care must be taken to ensure that the drive is not ph ysically distorted due to a stiff non-flat mounting surface. The allow able mounting surface stiffness is 80 lb/in (14.0 N/ mm). The following equation and paragraph define the allow ab le mounting surf ace stiffness:

k * x = 80 lb (14.0 N)

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 millimetres). The out-of plane distor tion (‘x’) is determined by defining a plane with three of the four mounting points fix ed and ev aluating the out-of-plane deflection of the fourth mounting point when a known force is applied to the fourth point.

28 Product Manual - Hawk 4 Family SCSI-2 (Volume 1), Rev. F ______________________________________________________________________________________

8.0 Media characteristics

8.1 Media description

The media used on the drive has a diameter of approximately 95 mm (appro ximately 3.7 inches). The aluminum substrate is coated with a thin film magnetic material, overcoated with a proprietary protective layer f or improved durability and environmental protection.

Product Manual - Hawk 4 Family SCSI-2 (Volume 1), Rev. F 29 _____________________________________________________________________________________

9.0 Defect and error management

The drive, as delivered, complies with this specification. The read error rate and specified storage capacity are not dependent upon use of defect management routines by the host (initiator).

Defect and error management in the SCSI system inv olves the drive internal defect/error management and SCSI systems error considerations (errors in communications between Initiator and the drive). Tools for use in designing a defect/error management plan are briefly outlined in this section, with references to other sections where further details are given.

9.1 Drive internal defects/errors

Identified defects are recorded on the drive def ects list tracks (referred to as the primary or ETF defect list). These known defects are reallocated during the initial drive f ormat operation at the factory . (See F ormat Unit command Section 5.2.1.2 in SCSI Interface Product Manual*). Data correction by ECC is applied to recover data from additional flaws if they occur .

Details of the SCSI commands supported by the drive are described in SCSI Product Interface Manual*. Also, more inf ormation on the drive Error Recovery philosophy is presented in Section 6 of the SCSI Interf ace Product Manual.

9.2 SCSI systems error considerations

Information on the reporting of operational errors or faults across the interface is given in 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 Interface 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.

__________ *SCSI Interface Product Manual P/N 77738479.

30 Product Manual - Hawk 4 Family SCSI-2 (Volume 1), Rev. F ______________________________________________________________________________________

10.0 Option/configuration headers

10.1 Drive ID/option select header

Figure 10.1-1 shows a bottom view of the drive (PCB tow ard view er) for the purpose of showing the drive ID select and configuration option select jumper connectors. The notes following the figures describe the functions of the various jumper positions on the 3 connectors J2, J5 and J6. See paragraph 11.6.3.3 for part number of the unusual J2 jumpers.

Side View of Drive

Pin 1

SCSI ID = 0

SCSI ID = 1

SCSI ID = 2

SCSI ID = 3

SCSI ID = 4

SCSI ID = 5

SCSI ID = 6

SCSI ID = 7

A0A1A

HDA

SCSI ID = 0

SCSI ID = 1

SCSI ID = 2

SCSI ID = 3

SCSI ID = 4

Drive with HDA up, PCB down, viewed

from front

HDA

Reserved

A2A1A

Pin 1

End

Pin 1

Drive Front

R

L

R

E



Jumper

Positions



T

D

M

Enable

Terminators

Delay Motor Start

Enable Motor Start

SCSI I/O

Connector

DC Power Connector



W

P

S

Pin 1



T

[2]

SCSI ID = 5

SCSI ID = 6

Useage Reserved

SCSI ID = 7

Reserved

Remote

LED

3 4

from SCSI Bus

Shipped with cover installed.

Do not remove.

Do not install jumpers

CATH

on these four positions.

Figure 10.1-1a. ST15230N/ND family drive ID and option select header

Write Protect Parity Option

Term. Power

from Drive

Term. Power

to SCSI Bus

Term. Power

[3]

[2]

Position A

Product Manual - Hawk 4 Family SCSI-2 (Volume 1), Rev. F 31 _____________________________________________________________________________________

Notes for Figure 10.1-1:

[1] Notes explaining the functions of the various jumpers on jumper header connectors J2, J5 and J6 are

given below in left to right order of jumper position. The term “default” means as standard OEM units are configured when shipped from factory. “Off” means no jumper is installed; “On” means a jumper is

installed. Off or on underlined is factory default condition. [2] The "ND" model does not have terminators on the drive PCB, so these jumpers are not applicable. [3] Reserved usage. Do not install a jumper.

J2 Jumper Installation Jumper Function Description

TE (Applies only to "N" models)

On With the jumper installed, the On-board (non-removable) terminator circuits are enabled

(connected to the I/O lines). Default is jumper installed.

Off Terminator circuits not connected to I/O lines.

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 no WP jumper installed.

On Parity checking and parity error reporting by the drive is enabled. Default is PE jumper

installed.

Off Drive does not report result of parity checking to host.

Off Reserved jumper position. Default is no jumper installed.

TP TP

Off Off No terminator power is connected to drive terminators or SCSI bus I/O pin 26. On Off Drive supplies its own terminator power only. Jumper on this position is factory default. Off On Drive supplies power to I/O pin 26 of SCSI bus; none to internal terminators. When drives have

differential I/O circuits, a jumper on the right TP position may be needed to power external terminators (see system documentation). The ST15230ND drive has differential I/O circuits which have no terminator circuits on the drive.

On On Drive supplies terminator power to itself (internal connection) and to I/O pin 26 of SCSI bus.

This is a legal jumper setting.

32 Product Manual - Hawk 4 Family SCSI-2 (Volume 1), Rev. F _____________________________________________________________________________________

continued from previous page

TP Position A (Applies to "N" models only)

On This horizontally positioned jumper across the two TP positions nearest PCB edge, connects

terminator power from SCSI bus I/O pin 26 to the drive’s internal terminators (for single-ended I/O only).

Off See above explanations for TP jumpers.

J5 Jumper Installation Jumper Function Description A0,A1,A

Drive ID on SCSI Bus (J6 may be used instead, as J5 and J6 are in parallel. Use only one set for drive ID). The drive ID is binary coded positionwise i.e., jumper in position A2 is drive ID 4, in position A1 is ID 2, position A0 is ID 1 and no jumpers is ID 0. Default is ID = 0.

J6 Jumper Installation Jumper Function Description A2,A1,A

Drive ID on SCSI bus. Either J5 or J6 (optional) may be used to select drive ID. Both should not be used at the same time, because at some future time when the ID is changed the user could fail to configure both J5 and J6 the same. Default is ID = 0.

LED No jumper ever installed. These pins used to connect a cable for a remote LED indicator. Pin

3 (top, nearest HDA), the anode connection, connects in the drive to the +5V supply through a pull-up resistor. Pin 4 (bottom), the cathode connection connects in the drive to signal common through the emitter-collector junction of a transistor switch that controls the LED on/ off condition.

10.2 Grounding

Signal ground (PCB) and HDA ground are connected together in the ST15230 driv e and cannot be separated by the user . The equipment in which the drive is mounted is connected directly to the HD A and PCB with no electrically isolating shock mounts. If it is desired for the system chassis to not be connected to the HD A/PCB ground, the systems integrator or user must provide a nonconductiv e (electrically isolating) method of mounting the drive in the host equipment.

Product Manual - Hawk 4 F amil y SCSI-2 (Volume 1), Rev . F 33 _____________________________________________________________________________________

11.0 Interface requirements

11.1 General description

This section partially describes the interface requirements as implemented on the drives. The major portion of the interface requirements/implementation is described in the Seagate SCSI Interface Product Manual, P/N 77738479. This section has tables that giv e the ST15230 Family driv es version of the SCSI implementation described in the 77738479 document.

11.2 SCSI interface messages supported

T able 11.2-1 f ollowing lists the messages supported by the SCSI-1, SCSI-2 and SCSI-3 modes of the ST15230 Family drives .

Table 11.2-1. SCSI messages supported by ST15230N/ND family drives

Msg Supported by: Code SCSI-1 SCSI-2/SCSI-3 Message Name

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

Queue tag messages (two bytes) 21h Y Y Head of queue tag 22h Y Y Ordered queue tag 20h Y Y Simple queue tag 10h Y N Release recovery 03h Y Y Restore pointers 02h Y Y Save data pointer [1] Y Y Synchronous data transfer req. 13h Y Y T arget transf er disable 11h N N Terminate I/O process [1] N N Wide data transfer request

Notes.

[1] Extended messages (see P/N 77738479 SCSI Interface Product Manual). [2] Customer Unique

34 Product Manual - Hawk 4 Family SCSI-2 (Volume 1), Rev. F ______________________________________________________________________________________

11.3 SCSI interface commands supported

Table 11.3-1 following lists the SCSI interface commands that are supported in the SCSI-1, SCSI-2 and SCSI-3 modes of the drive. ST15230 F amily drives can be changed bac k and f orth between SCSI-1, SCSI2 and SCSI-3 modes using the Change Definition Command. OEM standard driv es are shipped set to operate in SCSI-2/SCSI-3 mode.

Table 11.3-1. Commands supported by ST15230N/ND family drives

Com’ d Supported by: Code SCSI-1 SCSI-2 Command Name

00h Y Y T est unit ready 01h Y Y Rezero unit 03h Y Y Request sense

Y Y Extended sense Y Y Field pointer bytes Y Y Actual retry count bytes Y Y Deferred error supported

04h Y Y Format unit [1]

N N Block format Y Y Bytes from index format Y Y Physical sector format

N N DPRY bit supported 07h Y Y Reassign blocks 08h Y Y Read 0Ah Y Y Write 0Bh Y Y Seek 12h Y Y Inquiry

Y Y Vital product data page

Y Y Unit serial number page

Y Y Implemented operating def. page

Y Y Firmware numbers page

Y Y Date code page

Y Y Jumper settings page

N Y Device Behavior page 15h Y Y Mode select (same pages as mode

sense command, see below)

16h Y Y Reserve

Y Y 3rd party reserve

N N Extent reservation 17h Y Y Release 18h N N Copy 1Ah Y Y Mode sense

Y Y Unit attention page (00h)

Y Y Byte 2 bit 4 (unit attn. bit)

Y Y Byte 2 bit 5 (DEID bit

Y Y Error recovery page (01h)

Y Y Disconnect/reconnect Control page (02h)

Y Y Format page (03h)

Y Y Rigid disc drive geometry page (04h)

N Y Verify error recovery page (07h)

Y Y Caching parameters page (08h)

N Y Control mode page (0Ah)

N Y Notch and Partition Page (0C) (Media Zones) [1] ST15230 can format to any even number of bytes per sector from 256 to 4096.

Product Manual - Hawk 4 Famil y SCSI-2 (Volume 1), Rev. F 35 _____________________________________________________________________________________

continued from previous page

Com’ d Supported by: Code SCSI-1 SCSI-2 Command Name

1Bh Y Y Start unit/stop unit (spindle ceases rotating) 1Ch Y Y Receive diagnostic results

Y Y Supported diagnostics pages

Y Y T ranslate page 1Dh Y Y Send diagnostics page

Y Y Supported diagnostics pages

Y Y T ranslate page 25h Y Y Read capacity 28h Y Y Read extended 2Ah Y Y Write extended 2Bh Y Y Seek extended 2Eh Y Y Write and verify 2Fh Y Y V erify 30h Y Y Search data high 31h Y Y Search data equal 32h Y Y Search data low 33h N N Set limits 34h N N Prefetch 35h N N Synchronize cache 36h N N Lock-unlock-cache 37h Y Y Read defect data 39h N N Compare 3Ah N N Copy and verify 3Bh Y Y Write buffer 3Ch Y Y Read buffer 3Eh Y Y Read long 3Fh Y Y Write long 40h Y Y Change definition 41h N N Write same 42-4Bh N N Not used 4Ch Y Y Log select 4Dh Y Y Log sense 4E-54 N N Not used 55h Y Y Mode select (10) 56h N Y Reserve (10) 57h N Y Release (10) 58-59 N N Not used 5Ah Y Y Mode sense (10) 5B-5F N N Not used 60-BFh N N Not used C0-DFh N N Not used EO-FFh N N Not used

36 Product Manual - Hawk 4 Family SCSI-2 (Volume 1), Rev. F ______________________________________________________________________________________

11.3.1 Inquiry data

11.3.1.1 Standar d Inquiry data

Table 11.3.1-1 following lists the Standard Inquiry command data that the drive should return to the initiator per the format given in the SCSI Interface Product Manual P/N 77738479, section 5.1.1.3.

Table 11.3.1-1. ST15230N/ND family drive Standard Inquiry data

Bytes Data (Hex)

0-15 00 00 ** *** 8F 00 00 16 53 45 41 47 41 54 45 20 Vendor ID 16-31 53 54 [31][35][32] [33][30][4E][20] 20 20 20 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 31* *Copyright 112-127 39* 39* 33* 20 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 20 144-148 D# D# D# D#

Notes.

* Copyright Y ear - changes with actual y ear. ** 01 means SCSI-1 implemented;

02 means SCSI-2 implemented. This implementation also includes some "SCSI-3" f eatures. ST15230N/ ND Family drives can be changed betw een these two configurations . Default is 02.

*** 01 means response data is in SCSI-1 format and has compatibility with Common Command Set data.

02 means response data is in SCSI-2 format. The drive can be changed betw een these two configurations. There is presently no way to indicate if SCSI-3 features are implemented. Default is 02.

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

mation is also given in the Vital Product data page C0h, together with servo RAM and ROM release

numbers. S# Eight ASCII digits representing the eight digits of the product serial number. D# Four ASCII digits representing the firmware distribution diskette serial number. [ ] Bytes 18 through 24 will reflect model of drive. Shown here are he x values for ST15230N. Codes f or the

“ND” model drive add 44.

11.3.1.2 Inquiry Vital Product data

Instead of the standard Inquiry data shown in Table 11.3.1-1, the initiator can request several Vital Product data pages by setting the Inquiry command EVPD bit to one. The SCSI Version 2 Interf ace Product Manual P/ N 77738479, Section 5.1.1.3.1 lists the Vital Product Data pages supported 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.

Product Manual - Hawk 4 Family SCSI-2 (Volume 1), Re v. F 37 _____________________________________________________________________________________

11.3.2 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 v alues, Saved v alues, Current values and Changeable values.

Default values are hard coded in the drive firmware that is stored in flash E-PROM non v olatile memory on the drive PCB. Default v alues can be changed only by do wnloading new firmware into the flash E-PROM. 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.

Saved values are stored on the disk 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 stor age.

Current values are v olatile 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 Def ault v alues after a po w er on reset, hard reset, or Bus De vice Reset message .

Changeable values f orm a bit mask, stored in nonvolatile memory , that dictates which of the Current values and Saved v alues can be changed by a Mode Select command. A “one” allows a change to a corresponding bit; a “zero” allows no change . F or example , in Table 11.3.2-1a refer to Mode page 01, in the first row entitled “CHG”. These are hex numbers representing the changeable values for Mode page 01. Note in columns 1 and 2 (bytes 00 and 01), there is 00h, which indicates that in bytes 00 and 01 none of the bits are changeable . Note also that bytes 04, 05, 06 and 07 are not changeable , because those fields are all zeros. In bytes 02, he x value FF equates to the binary pattern 1111 1111. If there were a zero in an y bit position in the field, it would mean that bit is not changeable. However, bits 7 - 0 are changeable, because those bits are all ones. In this particular case, it indicates 8 error recovery control bits are all changeable. FF in column 4 indicates all bits in byte 3 are changeable.

The Changeable values list can only be changed by downloading ne w firmware into the flash E-PROM. On drives requiring unique Saved values , the required unique Saved v alues are stored into the Saved v alues

storage location on the media prior to shipping the drive. Some drives may ha ve unique firmware with unique Default values also .

On standard OEM drives the Saved values are taken from the Default values list and stored into the Saved values storage location on the media prior to shipping.

When a drive is powered up, it takes Saved values from the media and stores them to the Current values storage in volatile memory . 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.

38 Product Manual - Hawk 4 Family SCSI-2 (Volume 1), Rev. F _____________________________________________________________________________________

The following tables list the values of the data bytes returned by the drive in response to the Mode Sense command pages for SCSI-1 and SCSI-2/SCSI-3 implementation (see SCSI Interface Product Manual, P/N

77738479). DEFINITIONS: DEF = Default value. Standard drives are shipped configured this way. Not changeab le via Mode

Select command.

CHG = Changeable bits; indicates current and saved values are changeable.

Table 11.3.2-1. Mode sense data, ST15230N/ND default values

(SCSI-1 implementation)

Bytes 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23

Mode Sense 63 00 10 08 Data 00 00 00 00 00 00 02 00

MODE P AGE HEADERS AND P ARAMETER DA TA BYTES Mode Page

00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23

DEF

01 81 06 00 28 30 00 00 FF

CHG

01 00 00 EF FF 00 00 00 00

DEF

02 82 0A 80 80 00 0A 00 00 00 00 00 00

CHG

02 00 00 FF FF 00 00 00 00 00 00 00 00

DEF

03 83 16 00 13 00 0C 00 00 00 26 00 6F 02 00 00 01 00 0B 00 17 40 00 00 00

CHG

03 00 00 FF FF FF FF 00 00 FF FF 00 00 00 00 00 00 00 00 00 00 00 00 00 00

DEF

04 84 12 00 0F 98 13 00 00 00 00 00 00 00 00 00 00 00 00 00 00

CHG

04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

DEF

08 88 12 14 00 FF FF 00 00 FF FF FF FF 80 03 00 00 00 00 00 00

CHG

08 00 00 BD 00 FF FF FF FF FF FF 00 00 A0 FF 00 00 00 00 00 00

DEF

00 80 02 00 00

CHG

00 00 00 76 FF

Product Manual - Hawk 4 Famil y SCSI-2 (Volume 1), Rev. F 39 _____________________________________________________________________________________

Table 11.3.2-2. Mode sense data, ST15230N/ND default values

(SCSI-2 implementation)

Bytes 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23

Mode Sense 87 00 10 08 Data 00 00 00 00 00 00 02 00

MODE P AGE HEADERS AND P ARAMETER DA TA BYTES Mode Page

00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23

DEF

01 81 0A 00 28 30 00 00 00 18 00 FF FF

CHG

01 00 00 EF FF 00 00 00 00 FF 00 00 00

DEF

02 82 0E 80 80 00 0A 00 00 00 00 00 00 00 00 00 00

CHG

02 00 00 FF FF 00 00 00 00 00 00 00 00 80 00 00 00

DEF

03 83 16 00 13 00 0C 00 00 00 26 00 6F 02 00 00 01 00 0B 00 17 40 00 00 00

CHG

03 00 00 FF FF FF FF 00 00 FF FF 00 00 00 00 00 00 00 00 00 00 00 00 00 00

DEF

04 84 16 00 0F 98 13 00 00 00 00 00 00 00 00 00 00 00 00 00 00 15 23 00 00

CHG

04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

DEF

07 87 0A 00 28 30 00 00 00 00 00 FF FF

CHG

07 00 00 0F FF 00 00 00 00 00 00 00 00

DEF

08 88 12 14 00 FF FF 00 00 FF FF FF FF 80 03 00 00 00 00 00 00

CHG

08 00 00 BD 00 FF FF FF FF FF FF 00 00 A0 FF 00 00 00 00 00 00

DEF

0A 8A 0A 02 00 00 00 00 00 00 00 00 00

CHG

0A 00 00 03 11 00 00 00 00 00 00 00 00

DEF

00 80 02 00 00

CHG

00 00 00 76 00

40 Product Manual - Hawk 4 Famil y SCSI-2 (Volume 1), Rev. F _____________________________________________________________________________________

11.4 SCSI Bus Conditions and Miscellaneous Features Supported

Asynchronous SCSI bus conditions supported by the drive are listed in Table 11.4-1. These conditions cause the SCSI device to perform certain actions and can alter the phase sequence. Other miscellaneous operating features supported are also listed here.

Table 11.4-1. SCSI bus conditions and other misc. features

Condition/Feature Supported by:

SCSI-1 SCSI-2 Conditions or Feature

Y Y Attention Condition Y Y Reset Condition Y Y Contingent Allegiance Condition N N Asynchronous Event Notification Y Y Arbitrating System Y Y Disconnect/Reconnect Y Y Asynchronous Data Transfer Y Y Synchronous Data Transfer N N Synchronized (locked) Spindle Operation Y Y Differential Interf ace Circuits av ailable Y Y Segmented Caching N N Zero Latency Read Y Y Queue tagging (up to 64 Que tags supported) Y Y Def erred Error Handling Y Y P arameter Rounding Y Y Reporting actual retry count in Extended Sense bytes

15, 16 and 17. N N Adaptive Caching N N SMP = 1 in Mode Select command needed to save

RPL and Rotational Offset bytes (in Table 5.2.1-25

of Vol. 2). Y Y Immediate status f or Start/Stop command Y Y Immediate status for Format Unit command N N Immediate status on synchronize Cache command Y Y F ormat progress indication [1] [1] Flag and Link bits in Control byte supported

SCSI-1 SCSI-2 Status Supported

Y Y Good Y Y Check Condition N N Condition Met/Good Y Y Busy [1] [1] Intermediate/Good Y Y Intermediate/Condition Met/Good Y Y Reservation Conflict Y Y Queue Full

Notes.

[1] Option supported only if customer requested.

Product Manual - Hawk 4 Famil y SCSI-2 (Volume 1), Rev. F 41 _____________________________________________________________________________________

11.5 Synchronous data transfer

11.5.1 Synchronous data transfer periods supported

Table 11.5-1 and 11.5-2 list Synchronous Data transfer periods supported by the drive. The data transfer period to be used by the drive and the initiator is established by an e xchange of messages during the Message Phase of operation. See the section on message protocol in the SCSI Interface manual.*

Table 11.5-1. Synchronous data transfer periods

M (Decimal) Transfer Period (M times 4 nanoseconds)

25 100 31 125 37 150 50 200 62 250 75 300 87 350 100 400

11.5.2 REQ/ACK offset

The maximum REQ/ACK offset supported by the ST15230 family is 15 (0Fh).

11.6 Physical interface

Figure 11.6-1 shows the locations of the physical interf ace components for the drive . Sho wn are the locations of the D .C . power connector, the SCSI interf ace connector, the I/O line terminators, and the drive select and option select header.

Details of the physical, electrical and logical characteristics are given in parag raphs following, while the SCSI operational aspects of Seagate drive interfaces are giv en in the Seagate SCSI Interf ace Product Manual, P/N 77738479.

__________ *SCSI Interface Product Manual, P/N 77738479

42 Product Manual - Hawk 4 Famil y SCSI-2 (Volume 1), Rev. F ______________________________________________________________________________________

SCSI I/O

Connector

Pin 1

1 2 3 4

Power

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

4321

DC Power Connector

I/O Terminator Module

("N" models only)

(not removable)

Pin 1 End

Figure 11.6-1. Physical interface

Product Manual - Hawk 4 Famil y SCSI-2 (Volume 1), Rev. F 43 _____________________________________________________________________________________

11.6.1 DC cable and connector

The drives receive DC power through a 4 pin connector mounted at the rear of the main PCB (see Figure

11.6-1). Recommended part numbers of the mating connector are listed below, but equivalent parts may be used (see Table 11.6-1).

Table 11.6.1-1. Mating connector parts

Type of cab le Connector Contacts (20-14 AWG)

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

AMP 61117-4 (Strip)

11.6.2 Physical characteristics

This section defines the connectors, cables, signals, terminators and bus timing needed to implement SCSI.

44 Product Manual - Hawk 4 Famil y SCSI-2 (Volume 1), Rev. F ______________________________________________________________________________________

11.6.2.1 Physical description

The drives may be daisy-chained together or with other compatible SCSI devices using a common cable. Both ends of the cable must be terminated. The model "N" drive implements single ended driv ers and receivers. The model "ND" driv e implements differential driv ers and receivers . All signals are common betw een all SCSI devices. The drive may be daisy-chained only with SCSI devices having the same type drivers and receivers. Devices having single ended interface circuits cannot be on the same daisy-chain with devices having differential interf ace circuit. A maximum of 8 SCSI de vices (including the Host) may be daisy-chained together. The SCSI De vices at both ends of the daisy-chain are to be terminated. Intermediate SCSI de vices shall not be terminated (see Figure 11.6.3-2). Remove the terminator enable jumper TE, not the terminator power source selector jumper TP (Figure 10.1-1).

11.6.2.2 Cable requirements

11.6.2.2.1 Single ended I/O circuits ("N" models)

The maximum total cable length for use with driv es having single ended I/O driver and receiv er circuits shall be 6 metres (19.7 ft.) when operating at line data transfer r ates of 5 Mbytes/sec or less, and 3 metres (9.85 ft.) when operating at transfer rates g reater than 5 Mb ytes/sec (FAST SCSI). A stub length of no more than 0.1 metre (0.33 ft.) is allowed off the mainline interconnection with any connected equipment. An ideal impedance match with cable terminators implies a cable characteristic impedance of 132 ohms (see 11.6.2.2.3). Single ended I/O cable pin assignments are shown in Table 11.6.3-1a.

11.6.2.2.2 Differential I/O circuits ("ND" models)

The maximum total cable length for use with driv es having differential I/O driv ers and receiver circuits shall be 25 metres (82 ft.). A stub length of no more than 0.2 metre (0.66 ft.) is allo wed off the mainline interconnection with any connected equipment. An ideal impedance match with cable terminators implies a cable characteristic impedance of 122 ohms (see 11.6.2.2.3). Diff erential I/O pin assignments are shown in Table 11.6.3-1b.

11.6.2.2.3 General cable characteristics

In general, cables having the characteristic impedance’ s given in 11.6.2.2.1 and 11.6.2.2.2 are not av ailable; however, impedance’s that are somewhat lower are satisfactory. A character istic impedance of 100 ohm ±10% is recommended for unshielded flat or twisted pair ribbon cable. Howev er , most av ailab le cables ha ve a somewhat lower characteristic impedance. To minimize discontinuances and signal reflections, cables of different impedance’ s should not be used in the same bus. Implementations ma y 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 F AST SCSI tr ansfer r ates.

Product Manual - Hawk 4 Famil y SCSI-2 (Volume 1), Rev. F 45 _____________________________________________________________________________________

Only nonshielded cable connectors are applicable. A 50 conductor flat cab le or 25 twisted pair cable shall be used. A minim um conductor size of 28 AWG should be used to minimize noise effects.

Suggested nonshielded flat cable part numbers are: Flat cable - 35M-3365-50 Twisted pair - Spectra Twist in flat 455-248-50

Equivalent parts may be used.

11.6.3 Connector requirements

11.6.3.1 Mating connectors

The nonshielded cable connector shall be a 50 conductor connector consisting of two rows of 25 female contacts with adjacent contents 100 mils apart.

Recommended Mating Flat Cable Connector Part Numbers are:

Closed end 3M-3425-7000 W/O Strain Relief, No Center K e y (for cable ends)* 3M-3425-7050 With Strain Relief, No Center Key

Dupont-66900-290 With Strain Relief, With Center Ke y

Open end 3M-3425-6000 W/O Strain Relief, No Center Key (In Daisy-chain) 3M-3425-6050 With Strain Relief, No Center Ke y

Dupont-66900-250 With Strain Relief, With Center Ke y *See Figure 11.6.3-2. The drive device connector is a nonshielded 50 conductor connector consisting of two rows of 25 male pins

with adjacent pins 100 mils apart. The connector is k e y ed (see Figure 11.6.3-1).

11.6.3.2 J2 Jumper plug part number

Option select header connector J2 on the PCB (see Figure 10.1-1b) uses an unusual type of jumper plug, so its part number is given here for reference:

Molex 52747-0211 (Seagate P/N 77670952).

46 Product Manual - Hawk 4 Family SCSI-2 (Volume 1), Rev. F _____________________________________________________________________________________

.370 ± .010

(9.398)

.100

(2.54)

(4.06)

.051

(1.30)

.16

.037 ref typ (.94)

.025

Square Contact

(.64)

(50 places)

(10.67)

(2.54)

"D" ± .010

.045

(1.14)

"C" ± .010

"B" ref

"A" ± .010

.42

ref

Pin 1

.100

typ

min typ 3

No. Pos.



(15.24)

.834 ± .010

(21.18)

"A"



3.767

(95.68)

.60

"B"



3.697

(93.90)

.20

typ

(5.08)

.065

x 45° chamfer typ

(1.65)

(6.60)

.335 ± .010

.040

(1.02)

"C"



2.720

(69.09)

.26

typ

(8.50)

+.001 –.002

"D"



2.400

dia

.083

(2.1) Trifurcated Pins (4 places)

ref

(60.96)

Figure 11.6.3-1. Non shielded 50 pin SCSI device connector and 4 pin DC power drive PCB connector

Product Manual - Hawk 4 Famil y SCSI-2 (Volume 1), Rev. F 47 ______________________________________________________________________________________

Disc Drive or

Other SCSI

Device

SCSI Device

Host Adapter/Initiator

SCSI Devices

Disc Drive or

Other SCSI

Device

* * *

1 thru 8

** ** *

Disc Drive or

Other SCSI

Device

View B (T indicates termination required) Total interface cable length must not exceed that specified in paragraph 11.6.2. (including host adapter/

initiator). * Closed end type connector used.

** Open end type (in-line application) connector used. *** Host need not be on the end of the daisy-chain. Another device can be on the end with the

terminator. The host can be somewhere other than the end, having no terminator.

Figure 11.6.3.-2. Interface cabling

Table 11.6.3-1a. Single ended 50 pin SCSI cable pin assignments

(Nonshielded connector)

Signal Pin Number Signal Pin Number

-DB (0) 2 GROUND 30

-DB (1) 4 -ATN 32

-DB (2) 6 GROUND 34

-DB (3) 8 -BSY 36

-DB (4) 10 -AC K 38

-DB (5) 12 -RST 40

-DB (6) 14 -MSG 42

-DB(7) 16 -SEL 44

-DB (P) 18 -C/D 46 GROUND 20 -REQ 48 GROUND 22 -I/O 50 GROUND 24 TERMPWR 26 GROUND 28

Notes.

1. All odd pins except pin 25 are connected to ground. Pin 25 is left open.

Caution

Pin 25 must not be connected to ground at the HOST end or the drive end of the cable. If the I/O connector should accidentally be plugged upside down, terminator power on pin 26 will be shorted to ground.

2. The minus sign next to the signals indicates asserted state is the low voltage of the two levels used for

logic signals.

48 Product Manual - Hawk 4 Famil y SCSI-2 (Volume 1), Rev. F _______________________________________________________________________________________

Table 11.6.3-1b. Differential cable pin assignments (Nonshielded connector)

+Signal Name* Pin Number -Signal Name*

SHIELD GND 1 2 GROUND +DB(0) 3 4 -DB(0) +DB(1) 5 6 -DB(1) +DB(2) 7 8 -DB(2) +DB(3) 9 10 -DB(3) +DB(4) 11 12 -DB(4) +DB(5) 13 14 -DB(5) +DB(6) 15 16 -DB(6) +DB(7) 17 18 -DB(7) +DB(P) 19 20 -DB(P) DIFFSENS 21 22 GROUND GROUND 23 24 GROUND TERMPWR 25 26 TERMPWR GROUND 27 28 GROUND +ATN 29 30 -ATN GROUND 31 32 GROUND +BSY 33 34 -BSY +ACK 35 36 -ACK +RST 37 38 -RST +MSG 39 40 -MSG +SEL 41 42 -SEL +C/D 43 44 -C/D +REQ 45 46 -REQ +I/O 47 48 -I/O GROUND 49 50 GROUND

* See Paragraph 11.6.4.2 f or detailed electrical characteristics of these differential signals.

Product Manual - Hawk 4 Family SCSI-2 (Volume 1), Rev. F 49 _____________________________________________________________________________________

11.6.4 Electrical description

Model "N" uses single ended interface signals. These signals must be terminated with 110 ohm active termination circuits at each end of the total cable. The terminators are enabled (or disabled) by installing (or removing) jumper plug TE. See Figure 10.1-1. Single Ended circuits use open collector or three state drivers. See Figure 11.6.4-1.

The model ST15230ND uses differential interface signals and each of these m ust be terminated at each end of the total cable with 330 ohms to +5 V and 330 ohms to ground with 150 ohms between each differential pair. All I/O circuits are open collector , three state driv ers. See Figure 11.6.4-2 f or circuit dra wing. Differential I/O drives are shipped without terminators. These drives have no provisions for adding ter minators on the PCB. On these drives some method of external termination must be provided by the user Systems Integrator or host equipment manufacturer .

11.6.4.1 Single ended drivers/receiver s

Typical single ended driver and receiver circuits for the "N" are shown in Figure 11.6.4-1. Terminator circuits shown (Note [1]) are to be enabled only when the disc drive is first or last in the daisy-chain. See section

11.6.4.3 on terminator requirements.

T ransmitter characteristics

Single ended drives use an ANSI SCSI compatible open collector single ended driver . This driver is capab le of sinking a current of 48 mA with a low level output voltage of 0.4 volt.

Receiver characteristics

Single ended drives use an ANSI SCSI single ended receiver with hysteresis gate or equivalent as a line receiver.

50 Product Manual - Hawk 4 F amily SCSI-2 (Volume 1), Rev. F _______________________________________________________________________________________

Line Driver

Transmitter

(or transceiver)

[2]

TP TP

[4]

Flat

110

Ohm

Cable

Pair

[5]

[3]

[1]

Line Receiver

[4]

110

[1]

Ohm

Receiver

[2]

[1] Part of active terminator circuits. Permanently mounted LSI terminators enabled in the drive ("N" only)

when it is first or last in the daisy-chain. See jumper header Figure 10.1-1 f or terminator enabling jumper

TE. [2] ANSI SCSI compatible circuits [3] Total interface cable length should not e xceed that specified in paragr aph 11.6.2.2.1. [4] Source of drive terminator power is an active circuit which has an input source voltage selected by

jumper plug TP. See Figure 10.1-1. This applies to model "N" only. [5] Interface signals lev els and logical sense at the drive I/O connector are defined as follows:

Logic Level Driver Output Receiver Input

Negated (0) >2.5 V: <5.25 V >2.0 V: <5.25 V

Asserted (1) <0.4 V: >0.0 V <0.8 V: >0.0 V

The difference in the voltages between input and output signals is due to the losses in the cab le .

Figure 11.6.4-1. Single ended transmitters and receivers

Product Manual - Hawk 4 Family SCSI-2 (Volume 1), Rev. F 51 _____________________________________________________________________________________

11.6.4.2 Differential driver s/receivers

T ypical diff erential driver and receiver circuits used by the model "ND" are shown in Figure 11.6.4-2. The drive has no provisions for terminator circuits on differential I/O driv es.

Differential signals

All differential interface signals consist of two lines denoted +SIGNAL and -SIGNAL. A signal is true when +SIGNAL is more positive than -SIGNAL, and a signal is false when -SIGNAL is more positive than +SIGNAL. All assigned signals shall be terminated at each end of the cable as shown in Figure 11.6.4-2. Drive user, Systems integrator or Host equipment manuf acturer must provide some e xternal means of termination.

Output characteristics

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

Low-level output voltage* = 2.0 V maximum at Lo w-le v el output current = 55 milliamps. High-level output v oltage* = 3.0 V minimum at High-level output current = -55 milliamps Differential voltage = 1.0 V minimum with common-mode voltage ranges from -7 V dc to +12 V dc.

*These voltages shall be measured between the output terminal and the SCSI device’s logic ground reference.

The output characteristics shall additionally conform to EIA RS-485-1983.

Input characteristics

Each signal received by diff erential interf ace drives shall ha ve the following input characteristics when measured at the disc drive SCSI connector:

Input current on either input = +2.0 milliamps maximum (includes both receivers and passive driv ers). This requirement shall be met with the input voltage varying between -7 V dc and +12 V dc, with po wer on or

off, and with the hysteresis equaling 35 mv, minimum. The input characteristics shall additionally conform to EIA RS-485-1983.

52 Product Manual - Hawk 4 Family SCSI-2 (Volume 1), Rev. F _____________________________________________________________________________________

+5V

5.6K

Transmit/Receive

Enable (1)

DIFFSENS (6)

Transmit or Receive Signal (2)

SCSI Device at Beginning of I/O Cable (usually Host Adaptor/Initiator)

+5V

LSI

XCVR

RE Disable

Term

(5)

Power

330

(4)

Ohm

1 1

+5V

Transmit/Receive

Enable (1)

DIFFSENS (6)

Transmit or Receive Signal (2)

5.6K

Ohm

330

Ohm

150

(7)



Twisted or Flat

(3)

Cable Pair



+5V

LSI

XCVR

RE Disable

1 1

Term

Power

330

Ohm

150

Ohm

330

Ohm

(5)

(4)

(7) SCSI Device at End of I/O Cable (Drive/Target)



Notes.

[1] Positiv e Logic Enables Transmitter (+5 V = Asserted)

Negative Logic Enables Receivers (0 V = Asserted) [2] Negative Logic Signal (0 V = Asserted) [3] T otal interf ace cable length should not e xceed value given in paragraph 11.6.2.2 from first SCSI de vice

at beginning to end of daisy-chain. See section 11.6.4.2 f or signal char acteristics. [4] I/O Line terminators. If SCSI device is a Seagate disc drive, terminators and a place to plug them in

must be provided external to the drive by user, systems integrator or host equipment manufacturer

where needed. See section 11.6.4.3. The drive has no terminators and there are no provisions on the

drive for terminator installation. [5] Arrangements for connecting terminator power to the terminators must be made by the systems de-

signer. As a help, drive +5 V power is made available on SCSI b us pin 26 f or po wering external termi-

nators if the drive option select header jumper TP (Figure 10.1-1) is installed in rightmost position “ TP”. [6] SCSI I/O line (pin 21) disables I/O circuits if single-ended cable plugged in or cab le plugged in upside

down. [7] SCSI I/O cable ground. See Table 11.6.3-1b.

Figure 11.6.4-2. Typical differential I/O line transmitter/receiver and external terminators

Product Manual - Hawk 4 Family SCSI-2 (Volume 1), Rev. F 53 _____________________________________________________________________________________

11.6.4.3 T erminator requirements

Internal disc drive I/O termination (provided only in single ended I/O model ST15230N drives) consists of active circuits in an LSI module that is permanently mounted on the PCB. All single initiator/single target (nondaisychain) applications require that the Initiator and disc drive be terminated. Daisy-chain applications require that only the units at each end of the daisy-chain be terminated. All other peripherals on the chain must not be terminated. (See Figure 11.6.3-2).

Note. Remove drive terminator enabling jumper TE (see Figure 10.1-1) where terminators are not required.

Removal of terminator power source selection jumper TP (see Figure 10.1-1) does not disconnect the terminator resistors from the circuit.

It is highly recommended that ANSI SCSI-2 Standard's Alternative 2 termination (active termination) be used for single-ended (ST15230N) applications, especially if the bus will be operated at transfer rates above 5 Mbytes/sec. The ST15230N provides on-board active termination that can be disabled by removal of the enable jumper TE (see Figure 10.1-1).

Note. Active terminators are highly recommended for use in the daisy-chain as described above. Active

and passive terminators should not be mixed on the same SCSI bus.

Differential I/O ST15230ND does not have terminators on the PCB. The user, systems integrator or host equipment manufacturer must provide a terminator arrangement external to the drive.

11.6.4.4 T erminator power

The drive may be configured to accept terminator power from pin 26 of the SCSI Bus, to supply power to the SCSI bus or to provide terminator power for internal termination circuits from the drive power connector . See Figures 10.1-1 and 11.6-1. The drive can provide power both to its own terminators and to the SCSI Bus terminator power line (Pin 26) if both “ TP” jumpers are on.

SCSI devices providing terminator power (TERMPWR)* shall hav e the f ollowing characteristics:

V TERM = 4.50 V to 5.25 V 800 mA min source drive capability

1.0 A maximum

*See Figure 10.1-1 for configuration details.

54 Product Manual - Hawk 4 Family SCSI-2 (Volume 1), Rev. F ______________________________________________________________________________________

11.7 Disc drive SCSI timing

Table 11.7-1. Disc drive SCSI timing*

Waveform Waveform

Description Symbol [1] T able [1] Typical

Target Select Time (no Arbitr ation) T00 N /A <1 µs Target Select Time (with Arbitr ation) T01 4.5-1,2 2.34 µs Target Select to Command T02 4.5-1 3.82 µs Target Select to MSG Out T03 4.5-2 1.51 µs Identify MSG to Command T04 4.5-3 3.56 µs Command to Status T05 4.5-5 Command Dependent Command to Data (para. In) T06 4.5-9 Command Dependent Command to Data (para. Out) T07 4.5-10 Command Dependent Command to Data (Write to Data Buffer) T08 4.5-10 Command Dependent Command to Disconnect MSG T09 4.5-6 Command Dependent Disconnect MSG to Bus Free T10 4.5-6,14 0.68 µs Disconnect to Arbitration (for Reselect) T11 4.5-6 Command Dependent This measures disconnected CMD ov erhead. Target win Arbitration (for Reselect) T12 4.5-7 Arbitration to Reselect T13 4.5-7 Reselect to Identify MSG In T14 4.5-7 Reselect Identify MSG to Status T15 4.5-8 Command Dependent Reselect Identify MSG to Data (media) T16 4.5-11 Command Dependent Data to Status T17 4.5-15 Command Dependent Status to Command Complete MSG T18 4.5-5,8,15 Command Complete MSG to Bus Free T19 4.5-5,8,15 Data to Save Data P ointer MSG T20 4.5-14 Save Data Pointer MSG to Disconnect

MSG T21 4.5-14 Command Byte Transfer T22 4.5-4 Next Command Byte Access 4.5-4

Next CDB Byte Access (Byte 2 of 6) T23.6.2 4.5-4 0.54 µs

Next CDB Byte Access (Byte 3 of 6) T23.6.3 4.5-4 0.11 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 0.13 µs

Next CDB Byte Access (Byte 6 of 6) T23.6.6 4.5-4 0.11 µs

Product Manual - Hawk 4 Family SCSI-2 (Volume 1), Rev. F 55 ______________________________________________________________________________________

continued from previous page

Wavef orm Wa veform

Description Symbol [1] T able [1] Typical

Asynchronous Data Transfer Characteristics: (contin ued)

Next CDB Byte Access (Byte 2 of 10) T23.10.2 4.5-4 0.51 µs

Next CDB Byte Access (Byte 3 of 10) T23.10.3 4.5-4 0.13 µs

Next CDB Byte Access (Byte 4 of 10) T23.10.4 4.5-4 0.11 µs

Next CDB Byte Access (Byte 5 of 10) T23.10.5 4.5-4 0.12 µs

Next CDB Byte Access (Byte 6 of 10) T23.10.6 4.5-4 0.12 µs

Next CDB Byte Access (Byte 7 of 10) T23.10.7 4.5-4 0.11 µs

Next CDB Byte Access (Byte 8 of 10) T23.10.8 4.5-4 0.12 µs

Next CDB Byte Access (Byte 9 of 10) T23.10.9 4.5-4 0.11 µs

Next CDB Byte Access (Byte 10 of 10) T23.10.10 4.5-4 0.13 µs

Data In Byte Transfer (parameter) T24 4.5-12

Data Out Byte Transfer (parameter) T25 4.5-13

Next Data In Byte Access (parameter) T26 4.5-12 0.10 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 0.10 µs

MSG IN Byte Transfer T32 4.5-5,7

4.5-8,14,15 MSG OUT Byte Transfer T3 3 4.5-2 STATUS Byte T ransf er T34 4.5-5,8

4.5-15 Synchronous Data Transfer Characteristics:

Request Signal Transfer P eriod [3] --various

Notes.

[1] See SCSI-2 Interface Manual P/N 77738479 (called V olume II), section 4.5 [2] Maximum SCSI asynchronous interface transf er rate is giv en in section 5.3. [3] Synchronous Transfer P eriod is determined by negotiations between an Initiator and a Drive. The Drive is

capable of setting periods as given in section 11.5. See also sections 3.1.5.2 and 3.5.3.2 of the SCSI-2 Interface Product Manual (P/N 77738479) for a description of synchronous data transf er operation.

General timing diagrams for SCSI interf ace oper ation are shown in the SCSI-2 Interf ace Product Man ual P/N 77738479, Section 4.5. The specific timing values that apply to this drive are listed in Table 11.7-1.

56 Product Manual - Hawk 4 Family SCSI-2 (Volume 1), Rev. F _____________________________________________________________________________________

12.0 Options

All options are incorporated or packaged at the manufacturing facility.

12.1 Front panel

The normal front panel available is blac k plastic. Other panel colors may be special ordered. Each panel has a single rectangular green LED indicator lens which, when glowing, indicates the drive is selected.

12.2 Single unit shipping pack

The drive is normally shipped in bulk packaging to provide maximum protection against transit damage . Units shipped individually require additional protection as provided by the single unit shipping pack. Users planning single unit distribution should specify this option.

12.3 Installation manual

This manual (P/N 77767474) is usually included with each drive shipped, but e xtr a copies may be ordered. The Installation Guide provides basic information on the care and handling of Winchester disc peripherals in general. Some information needed when installing the drive is included to assist individuals not f amiliar with the product. It also includes basic inf ormation to assist in obtaining service for the drive .

Product Manual - Hawk 4 Family SCSI-2 (Volume 1), Rev. F 57 _____________________________________________________________________________________

13.0 Accessories

All accessories are designed for implementation by the customer .

13.1 Front panel kit

Same as 12.1 but includes all mounting hardware to support field installation.

13.2 Additional Installation Guide copies

This manual (P/N 77767474) is usually included with each drive shipped, but extr a copies ma y be ordered.

58 Product Manual - Hawk 4 Family SCSI-2 (Volume 1), Rev. F _____________________________________________________________________________________

14.0 Technical support services

Seagate Technology provides technical support literature and diagnostic utilities to Authorized Distributors. Please contact your dealer for technical support and installation troubleshooting. Product Technical Support is available f or all Seagate products by calling the SeaF ax, SeaF one , SeaTDD or SeaBoard services. These are toll calls.

SeaFax: United States 408/438-2620 England 44-62-847-7080

You can use a T ouch-Tone telephone to access Seagate’s automated F AX deliv ery system and select technical support information by return FAX. This service is available 24 hours a day, 7 days a week.

SeaFone: 408/438-8222

The enhanced phone system provides recorded technical information on selected Seagate products while you are on hold. Technical support specialists are available to answer questions from 8:00 AM to 5:00 PM PST, Monday through F rida y. Recordings are accessible 24 hours a da y, 7 days a week.

SeaTDD: 408/438-5382

TDD is a Telecommunication Device for the Deaf where two people can communicate using a k e yboard that is connected to the phone line. A TDD de vice is required to access this service. This service is available from 8:00 AM to 5:00 PM PST, Monday through F rida y.

SeaBoard:

The Seagate Technical Support Bulletin Board System (BBS) is available 24 hours a day, 7 days a week. A modem is required to access this service. The communications software must be set for eight data bits, no parity and one stop bit (8N1).

With this service you can access:

• Specifications and jumper configurations for all Seagate products.

• Reprints of Seagate documentation.

• A directory of information and helpful utilities that you can download to your own computer.

BBS Modem Location Number

USA, Mexico, Latin America 408/438-8771 Canada 416/856-5581 England 44-62-847-8011 France 33-1-40-67-1034 Germany 49-89-140-9331 Singapore 65-292-6973 Australia 61-2-756-2359 Korea 82-2-556-7294

Seagate T echnology, Inc. 920 Disc Drive, Scotts Valley, California 95066-4544, USA

Publication Number: 77767472, Revision F Printed in USA

Seagate ST15230ND, ST15230N, HAWK 4 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual