Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hawk 1 Family
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ST11200N/ND/NC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ST1980N/ND/NC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ST1830N, ST1950N
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Product Manual
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Product Manual - Hawk 1 F amily SCSI-2 (Volume 1), Rev. D
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Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hawk 1 Family
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ST11200N/ND/NC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ST1980N/ND/NC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ST1830N, ST1950N
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Product Manual
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Product Manual - Hawk 1 F amily SCSI-2 (Volume 1), Rev. D
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Copyright Notice
© 1994 Seagate Technology, Inc. All rights reserved
Publication Number: 77738476, Rev. D
June 1994
Seagate, Seagate Technology , Wren and the Seagate logo are registered trademarks of Seagate
Technology, Inc. SeaFAXTM, SeaFoneTM, SeaTDDTM and SeaBOARDTM are trademarks of Seagate T echnology, Inc. Other product names are registered trademarks or trademarks of their owners.
Seagate reserves the right to change, without notice, product offerings or specifications. No part of this
publication may be reproduced in any form without written permission of Seagate Technology, Inc.
Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
_____________________________________________________________________________________
Revision status summary sheet
Revision Authority Date Writer/Eng. Sheets Affected
A Issue 1/12/93 D. Ashby 1 through 72
B. Norman
B PLD: 83287 3/12/93 D. Ashby 1 through 70.
B. Douglas (Technical changes on pages 17 thru
20, 38, 39, 41 thru 43, and 68).
C PLD: 83504 93 Oct 04 D. Ashby v thru vii, 1 thru 73
D PLD: 83684 94 Jun 13 D. Ashby v thru viii, 1 thru 73
(technical changes on pages 3, 8, 14,
27, 49, 57, 59)
v
Notice:
Product Manual 77738476 is Volume 1 of a two Volume document with the SCSI interface information in the Volume 2 SCSI Interface Product Manual, P/N 77738479.
If the SCSI Interface information is needed the Volume 2 Interface Manual should be ordered, P/N
77738479.
vi
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1.0 Scope ..................................................................................................................................... 1
2.0 Applicable standards and reference documentation........................................................... 2
2.1 Standards ..................................................................................................................... 2
2.2 Applicable reference documents .................................................................................. 3
3.0 General description................................................................................................................. 4
4.0 Standards features .................................................................................................................. 6
4.1 Performance................................................................................................................. 6
4.1.1 Reliability ......................................................................................................... 6
4.2 Unformatted and formatted capacities.......................................................................... 7
4.3 Options (factory installed)............................................................................................. 7
4.4 Optional accessories (user installed)............................................................................ 7
4.5 Installation .................................................................................................................... 8
5.0 Performance characteristics .................................................................................................. 9
5.1 Internal drive characteristics (transparent to user) ....................................................... 9
5.2 SCSI drive Seek, Read and Write performance characteristics (Visible to User)......... 9
5.2.1 Seek command execution time........................................................................ 9
5.2.2 Format drive command execution time............................................................ 10
5.2.3 Read data command execution time ...............................................................10
5.2.4 Write data command execution time................................................................10
5.3 Generalized performance characteristics.....................................................................10
5.4 Start/stop time ..............................................................................................................13
5.5 Prefetch/multi segmented cache control....................................................................... 13
5.5.1 Cache operation .............................................................................................. 13
5.5.2 Prefetch operation ........................................................................................... 14
5.6 Caching write data........................................................................................................ 15
5.7 Synchronized spindle operation.................................................................................... 15
Product Manual - Hawk 1 F amily SCSI-2 (Volume 1), Rev. D
T a b le of contents
6.0 Reliability specifications ........................................................................................................19
6.1 Error rates ....................................................................................................................19
6.1.1 Read errors...................................................................................................... 19
6.1.2 Environmental interference..............................................................................19
6.1.3 Write errors ...................................................................................................... 20
6.1.4 Seek errors ...................................................................................................... 20
6.2 Reliability and service................................................................................................... 20
6.2.1 Mean time between failure............................................................................... 20
6.2.2 Preventive maintenance ..................................................................................20
6.2.3 Service life ....................................................................................................... 20
6.2.4 Service philosophy...........................................................................................21
6.2.5 Installation........................................................................................................21
6.2.6 Service tools .................................................................................................... 21
6.2.7 Product Warranty............................................................................................. 21
7.0 Physical/electrical specifications ..........................................................................................22
7.1 AC power requirements................................................................................................ 22
7.2 DC power requirements................................................................................................22
7.2.1 Conducted noise immunity .............................................................................. 23
7.2.2 Power sequencing ...........................................................................................23
7.2.3 12 V - current profile ........................................................................................23
Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
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T a b le of contents
7.3 Heat/power dissipation ................................................................................................. 24
7.4 Environmental limits .....................................................................................................25
7.4.1 T emper ature.....................................................................................................25
7.4.2 Relative humidity ............................................................................................. 27
7.4.3 Effective altitude (sea level ref)........................................................................27
7.4.4 Shock and vibration .........................................................................................27
7.4.5 Air cleanliness ................................................................................................. 29
7.5 Electromagnetic compatibility.......................................................................................29
7.5.1 Electromagnetic susceptibility..........................................................................29
7.6 Mechanical specifications............................................................................................. 30
7.6.1 Drive orientation...............................................................................................32
7.6.2 Cooling.............................................................................................................32
7.6.3 Drive mounting.................................................................................................32
8.0 Media characteristics.............................................................................................................. 33
8.1 Media description .........................................................................................................33
9.0 Defect and error management ...............................................................................................34
9.1 Drive internal defects/errors .........................................................................................34
9.2 SCSI systems error considerations .............................................................................. 34
vii
10.0 Option/configuration headers ................................................................................................ 35
10.1 Drive ID/option select header .......................................................................................35
10.2 Synchronized spindles interface...................................................................................39
10.2.1 electrical description ........................................................................................ 39
10.3 Grounding.....................................................................................................................40
11.0 Interface requirement.............................................................................................................. 41
11.1 General description ...................................................................................................... 41
11.2 SCSI interface messages supported ............................................................................ 41
11.3 SCSI interface commands supported ........................................................................... 42
11.3.1 Inquiry data......................................................................................................44
11.3.2 Mode sense data .............................................................................................45
11.4 SCSI bus conditions and miscellaneous features supported........................................ 53
11.5 Synchronous data transfer ........................................................................................... 54
11.5.1 Synchronous data transfer periods supported.................................................54
11.5.2 REQ/ACK offset............................................................................................... 54
11.6 Physical interface ......................................................................................................... 55
11.6.1 DC cable and connector .................................................................................. 56
11.6.2 Physical characteristics ...................................................................................56
11.6.3 Connector requirements ..................................................................................57
11.6.4 Electrical description........................................................................................ 63
11.7 Disc drive timing ...........................................................................................................67
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12.0 Options..................................................................................................................................... 69
12.1 Front panel ................................................................................................................... 69
12.2 Single unit shipping pack .............................................................................................. 69
12.3 Drive termination .......................................................................................................... 69
13.0 Accessories .............................................................................................................................70
13.1 Front panel kit...............................................................................................................70
13.2 Installation manual........................................................................................................ 70
14.0 Technical support services .................................................................................................... 71
Seagate Peripheral Family................................................................................................................... 72
Product Manual - Hawk 1 F amily SCSI-2 (Volume 1), Rev. D
Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
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1.0 Scope
This specification describes the Seagate Technology, Inc. Model Hawk 1 Family Disc Drives. These high
capacity, high performance disc drive products have been designed to support the Small Computer Systems Interface (SCSI) and are classified as “Intelligent” peripherals. The Model Hawk 1 Family is functionally compatible to a subset of the Seagate SCSI-2 Interface Specification 77738479, and the ANSI SCSI-2
standard. The Hawk 1 Family also provides Level 2 conformance (highest level) with the ANSI SCSI-1
standard. Details of the Ha wk 1 Family drive SCSI implementation are provided in Section 11 of this specification, (Vol. 1) and in the SCSI-2 Interface Product Manual P/N 77738479 (Vol. 2; Ver. 2).
The Hawk 1 family of drives consists of the ST11200N/ND/NC, ST1980N/ND/NC , ST1950N and ST1830N
drives.
The Hawk 1 Family products will be referred to as “the drive” from this point on unless reference to individual
models are necessary.
The drive printed circuit board is referred to as a PCB.
1
SEAGATE
*
* 50 pin SCSI I/O and 4 pin DC power connector shown. "NC" models have one 80 pin connector and no
separate DC power connector.
Figure 1-1. Hawk 1 N/ND family drive
2
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Product Manual - Hawk 1 F amily SCSI-2 (Volume 1), Rev. D
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 environment in order to achieve
optimum performance and compliance with applicable industry and governmental regulations. Special attention must be given in the areas of safety, power distribution, shielding, audible noise control, and temperature regulation.
2.1 Standards
The Hawk 1 Family complies with Seagate standards as noted in the appropriate sections of this specification and the Seagate SCSI-2 Interface Specification, P/N 77738479 (Vol. 2, Version 2).
The Hawk 1 Family 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 0805/05.90 and EN60950: 1988 (IEC
950).
The Hawk 1 family drives, as delivered, are designed for system integration and installation into a suitable
enclosure prior to use. As such the Ha wk 1 f amily drives are supplied as a sub-assembly 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. However, 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 Hawk 1 family drives serve to minimize radiation when installed in
an enclosure that provides reasonable shielding. As such, the Ha wk 1 f amily drives are capab le of meeting
the Class B limits of the FCC Rules and Regulations of the Canadian Department of Communication. However , it is the users responsibility to assure that the Ha wk 1 f amily drives meet the appropriate EMI requirements in their system. Shielded I/O cables may be required if the enclosure does not provide adequate
shielding. If the I/O cables are external to the enclosure, shielded cables should be used, with the shields
grounded to the enclosure and to the host controller.
Caution. To avoid potential service problems, observe the following precautions:
The Manufacturers installed labels must not be removed from the drive or covered with additional labels, as they contain information required when servicing the product.
Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
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2.2. Applicable reference documents
SCSI Installation Handbook Seagate P/N 77738480
Product Manual - SCSI-2 Interface Seagate P/N 77738479
ANSI Small Computer System Interface (SCSI): Document Number ANSI3.131-1986 (X3T9/84.40 Rev. 1B)
(X3T9.2/82-2 Rev. 17B) and X3T9.2/86-109 Revision 10C (SCSI-2).
Package Test Specification: Seagate P/N 30190-001 (under 100 lb)
Package Test Specification: Seagate P/N 30191-001 (over 100 lb.)
In case of conflict between this document and any referenced document, this document shall take precedence.
3
4
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Product Manual - Hawk 1 F amily SCSI-2 (Volume 1), Rev. D
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 eight 3.7 inch (95 mm) fixed discs.
The drive supports the Small Computer System Interface-2 (SCSI-2) as described in the ANSI SCSI and
SCSI-2 Interface Specifications to the extent described in this product specification (Vol. 1), which defines
the product performance characteristics of the Hawk 1 N/ND Family of drives, and the SCSI-2 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 relieve the host from the necessity of knowing the physical characteristics of the
target (logical block addressing is used).
The Head/Disc Assembly (HDA) is environmentally sealed at the factor y. 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 exploded view of the drive. NEVER disassemble the Head/Disc Assembly
(HDA). This exploded vie w is for inf ormation only . Do not attempt to service items in the sealed environmental enclosure (heads, media, actuator, etc.) as this requires special facilities. The drive contains no parts
replaceable by the user. The drive warranty is voided if the HDA is opened.
The Hawk 1 Family drives 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 removed.
The Hawk 1 Family drives incorporate an automatic shipping lock which prevents potential damage to the
heads and discs resulting 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 1 F amily drives decode Track 0 location from the dedicated servo surface to eliminate mechanical transducer adjustments and related reliability concerns.
The Hawk 1 Family drives use a high performance actuator assembly that consists of a low inertia, balanced, patented, straight arm design that provides excellent performance with minimum power dissipation.
Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
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5
N/ND Family PCB NC Family PCB
Figure 3.0-1. Hawk 1 family drive
6
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Product Manual - Hawk 1 F amily SCSI-2 (Volume 1), Rev. D
4.0 Standard features
The Hawk 1 Family has the following standard features:
• Integrated SCSI Controller
• Single Ended and Diff erential SCSI driv ers and receivers
• Asynchronous and Synchronous data transfer protocol
• Firmware downloadable via SCSI interface
• 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
• A utomatic 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
• Active termination with removable terminator modules.
• Synchronous spindle capability
• 256 K byte data buffer
• 5-year warranty
4.1 Performance
• Programmable multi-segmentable cache buffer
• A utomatic Adaptive Cache
• Zero Latency Reads
• 5411 RPM Spindle. Average latency = 5.4 ms
• Command Queuing of up to 64 commands per initiator
• Background processing of queue
• Supports start and stop commands
• Provides synchronized spindle capability
• Low audib le noise for office environment
• Low power consumption
• Balanced low mass rotary voice coil actuator
4.1.1 Reliability
• 200,000 hour MTBF
• Adaptive servo compensation for improved seek performance
• LSI circuitry
Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
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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 following table shows some typical formatted capacities.
Capacities in Megabytes
Applicable model numbers
Spare Sector or Cylinders ST11200 ST1980 ST1950 ST1830
reserved for reallocation 512* 1024* 512* 1024* 512* 1024* 512* 1024*
No Spares 1066 1116 872 913 814 852 712 747
One Spare Sector
per track/2 spare
cylinders per unit** 1051 1087 860 8 89 803 831 702 728
One Spare Sector
per cylinder; 2 spare
cylinder per unit** 1064 1114 870 910 812 850 711 745
Unformatted Capacity 1248 1021 953 834
*Bytes per sector. Sector size selectable at format time. Users having the necessar y equipment may
modify the data block size before issuing a f ormat command and obtain different f ormatted 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.
**Spare cylinders are on the inner tracks.
7
The standard OEM model is as follows:
Formatted Data Block Size Unformatted
512 Byte/Sector
ST11200N/ND/NC 1054 MB* 1248 MB
ST1980N/ND 860 MB** 1021 MB
ST1950N 803 MB** 953 MB
ST1830N 702 MB** 834 MB
* Twelve spare sectors per cylinder, two spare cylinders/unit.
** One spare sector per track, two spare cylinders/unit.
4.3 Options (factory installed)
The capacities shown in paragraph 4.2 are available 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
• Installation Manual P/N 77738480
• SCSI Interf ace Terminating Resistors (Single Ended only)
4.4 Optional accessories (user installed)
The following accessories are available. 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
• Installation Guide P/N 77738480
•· Adapter Accessory Frame Kit P/N 75790701 (adapts 3.5-inch drive to fit in 5.25-inch drive mounting
space)
8
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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. Ref er 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 7.
• If multiple devices are on the bus set the drive SCSI ID to one that is not presently used by other
devices on the bus.
• If the drive is the only device on the bus, attach it to the end of the SCSI bus cable. Terminators are
required either on the drive for ST11200N and ST11200NC f amily models, or external to the drive for
ST11200ND family models. These external terminators must be provided by the user, systems
integrator or host equipment manufacturer.
• If the drive is attached to a bus that contains other devices, and the new drive is not attached to the
end of the bus, the terminators should be removed from the new 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 make the new settings effective.
• Installation instructions are provided by host system documentation or with any additionally pur-
chased drive installation software. If necessary see section 14.0 for Seagate support services
telephone numbers.
Formatting
Product Manual - Hawk 1 F amily SCSI-2 (Volume 1), Rev. D
• It is not necessary to low level format this drive. The drive is shipped from the factory low level
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.
Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
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9
5.0 Performance characteristics
5.1 Internal drive characteristics (transparent to user)
ST11200 ST1980 ST1950 ST1830
Drive Capacity 1248 1021 953 834 MByte (UNF)
Read/Write Heads 15 13 13 13 Data (Max)
Bytes/Track 41660 45434 46550 48419 Bytes (Avg)
Bytes/Surface 83 78.5 73 64 Mbytes (UNF)
Tracks/Surface, Total 1872 1730 1575 1325 Tracks (user
accessible)
Tracks/Inch 2150 2150 2150 2150 TPI
Servo Heads 1111
Internal Data Rate 23.2-40.6 24.4 - 40.6 25.2-41.2 28.4-41.2Mbits/sec
(variable with
zone)
Disc Rotational Speed 5411 +0.5% 5411 + 0.5% 4535 +0..5% 4535 +0.5% r/min
Average Rotational Latency 5.54 5.54 6.61 6.61 ms
5.2 SCSI Seek, Read and Write performance characteristics [8]*
Refer to Section 11.7 and to the SCSI-2 Interface Product Manual 77738479 f or additional timing details .
5.2.1 Seek time
Drive Level
ST11200 ST1980 ST1950 ST1830
Read Write Read Write Read Write Read Write
ms ms ms ms
Average - Typical [3] 10.5 11.2 9.9 10.6 TBD TBD TBD TBD
Max. [2] 12.0 13.0 11.4 12.4 TBD TBD TBD TBD
Single Track- Typical [3] 1.5 2.0 1.5 2. 0 TBD TBD TBD TBD
Max. [2] 3.5 4.0 3.5 4.0 TBD TBD TBD TBD
Full Stroke - Typical [3] 20.0 21.0 19.0 20.0 TBD TBD TBD TBD
Max. [2] 23.5 24.5 22.5 23.5 TBD TBD TBD TBD
Including Controller Overhead** [1][4]
ST11200 ST1980 ST1950 ST1830
Read Write Read Write Read Write Read Write
ms ms ms ms
Average - Typical [3] 11.7 12.5 11.1 11.9 TBD TBD TBD TBD
Max. [2] 14.0 15.0 13.4 14.4 TBD TBD TBD TBD
Single Track - Typical [3] 2.6 3.3 2.6 3.3 TBD TBD TBD TBD
Max. [2] 5.5 5.9 5.5 5.9 TBD TBD TBD TBD
Full Stroke - Typical [ 3 ] 21.2 22.4 20.2 21.4 TBD TBD TBD TBD
Max. [2] 25.7 27.1 24.7 26.1 TBD TBD TBD TBD
10
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5.2.2 Format drive command execution time (minutes) [1]
Maximum (with verify) 30 min 28 min TBD TBD
Maximum (no verify) 20 min 18 min TBD TBD
* [ ] All notes are listed in Section 5.3.1.
** With disconnect enabled and Read Look Ahead cache disab led.
5.2.3 Read data command execution time [4]*
(512 byte sector size, with disconnect enabled and read look ahead cache disabled)
latency time is included.
a. From CDB reception to the drive request for the first data byte to be transferred to the Host
1. Typical (Zero Stroke Seek) [3] 7.2 ms 7.2 ms TBD TBD
2. Typical (Average Seek) [3] 17.5 ms 16.8 ms TBD TBD
3. Maximum (Full Stroke Seek) [2] 36.1 ms 35.1 ms TBD TBD
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].
Product Manual - Hawk 1 F amily SCSI-2 (Volume 1), Rev. D
ST11200 ST1980 ST1950 ST1830
ST11200 ST1980 ST1950 ST1830
ST11200 ST1980 ST1950 ST1830
1. Typical (Zero Stroke Seek)[3] 7.3 7.3 ms TBD TBD
2. T ypical (Aver age Seek)[3] 17.6 ms 16.9 ms TBD TBD
3. Maximum (Full Stroke Seek)[2] 36.2 ms 35.2 ms TBD TBD
5.2.4 Write data command execution time [4]
(512 byte sector size, with disconnect disabled and read look ahead disabled) latency
time is included.
a. From CDB reception to the request for the first byte of write data from the Host.
1. Typical 1.5 ms 2. Maximum 1.8 ms
b. Single Sector Write and Data Transfer from Host [6] [7]
(Time from receipt of the last byte of the CDB to the request for a completion status transf er to the Host)
ST11200 ST1980 ST1950 ST1830
1. Typical (Zero Stroke Seek)[3] 7.0 ms 7.0 ms TBD TBD
2. T ypical (Aver age Seek)[3] 18.2 ms 17.6 ms TBD TBD
3. Maximum (Full Stroke Seek)[2] 38.2 ms 37.2 ms TBD TBD
*[ ] All notes are listed in Section 5.3.1.
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
Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
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11
continued from previous page
ST11200 ST1980 ST1950 ST1830
Min. [4]* 2.90 3.05 TBD TBD MByte/sec
Avg. [4] 4.14 4.21
Max. [4] 5.07 5.07
Data Buffer To/From Disc Media
Data Transfer Rate (< 1 Track) - 512 Byte Sector
ST11200
Min. [4] 2.50 MByte/sec divided by (Interleave Factor)
Avg. [4] 3.55 MByte/sec divided by (Interleave Factor)
Max. [4] 4.36 Mbyte/sec divided by (Interleave Factor)
ST1980
Min. [4] 2.62 MByte/sec divided by (Interleave Factor)
Avg. [4] 3.61 MByte/sec divided by (Interleave Factor)
Max. [4] 4.36 MByte/sec divided by (Interleave Factor)
ST1950
Min. [4] TBD MByte/sec divided by (Interleave Factor)
Avg. [4] TBD MByte/sec divided by (Interleave Factor)
Max. [4] TBD Mbyte/sec divided by (Interleave Factor)
ST1830
Min. [4] TBD MByte/sec divided by (Interleave Factor)
Avg. [4] TBD MByte/sec divided by (Interleave Factor)
Max. [4] TBD MByte/sec divided by (Interleave Factor)
SCSI Interface Data
Transfer Rate (Asynchronous) [5]
ST11200 ST1980 ST1950 ST1830
-Maximum Instantaneous 5.0** 5.0 TBD TBD MBytes/sec**
-Maximum Aver age 3.1 3.1 TBD TBD MBytes/sec
Sector Sizes 512 user data blocks (default)
Variable (256 to 4096) in even sector siz es
If sector size (n, bytes) is odd it will be rounded down to n-1.
Synchronous Transfer 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 flaws reallocated using the 1 sector time (typical)
spare sectors per track or cylinder reallocation scheme.)
Flaw reallocation performance impact (For flaws reallocated using the spare 35 ms (typical)
tracks per volume reallocation scheme.)
Track skew incorporated at format time 1.7 ms
Cylinder skew incorporated at format time 3.0 ms
Overhead time for one track cylinder switch <3 ms Typical
Average rotational latency 5.54 ms
* [ ] All notes are listed in Section 5.3.1.
** Assumes system ability to support 5.0 Mb/s and no cable loss.
12
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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 latency and data transfer).
[2] Maximum times are specified over the worst case conditions of temperature, voltage margins and drive
orientation. When comparing specified seek times, care should be taken to distinguish between typical
seek times and maximum seek times. The best comparison is obtained by system benchmark tests
conducted under identical conditions. Maximum times do not include error recovery.
[3] Typical Seek values 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 transfer phase (data to or from the disc media). Assumes the
initiator 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 of 5 MBytes/
sec.
Product Manual - Hawk 1 F amily SCSI-2 (Volume 1), Rev. D
[8] All performance characteristics assume that automatic adaptive temperature compensation is not in
process when the SCSI command is received. A SCSI command being executed is not interrupted for
automatic adaptive temperature compensation. If adaptive thermal compensation is in process when a
SCSI command is received, the command is queued until the compensation for the specific head being
compensated completes. When compensation completes for the specific head being compensated, the
first queued SCSI command is executed. When execution of the first queued command is complete, the
drive continues the compensation for the remaining head(s). The abov e procedure continues until com-
pensation for all heads is completed, or until one minute has elapsed. If the compensation for all heads
is not complete in one minute, the drive performs compensation for all of the remaining heads sequen-
tially without any interruption. The drive initiates an automatic adaptive temper ature compensation cycle
approximately once every 10 minutes and only when it detects a bus free condition between com-
mands. Automatic adaptive temperature compensation takes less than 0.1% of bus time. Automatic
temperature compensation also occurs at other times, but should be transparent to the user (e.g.,
during format, Rezero Command, at spindle up, during read error recovery , and during Reassign Bloc k
functions). A Rezero command can be used to reset the thermal compensation timer back to its start so
that the host can know when the interruption for thermal compensation will occur.
Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
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5.4 Start/stop time
After DC power has been applied, the drive becomes ready within 20 seconds (17 seconds typical) 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 will transfer commands over the SCSI interface but may take up to 3 seconds to respond back to
the host. Stop time is less than 20 seconds from remo val 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 typically becomes ready for normal operations within 13.5 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” operations. 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 disabled independently via the Mode
Select command. Ho wev er , in actual operation the pref etch f eature ov erlaps cache operation somewhat as
is noted in sections 5.5.1 and 5.5.2.
13
All default cache and prefetch Mode parameter values (Mode Page 08h) for standard OEM versions of this
drive family are given in T ab les 11.3.2-1 through 11.3.2-4.
5.5.1 Cache operation
In general, 240 Kbytes of the 256 Kbytes of ph ysical buffer space in the driv e can be used as storage space
for cache operations. The buff er can be divided into logical segments (Mode Select Page 08h, b yte 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 buff er (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, b ut only as circular
buffer segments during disc medium read operations (disregarding Prefetch operation for the moment).
That is, the drive does not check in the buff er segments for the requested read data, b ut goes directly to the
medium to retrieve it. The retrieved data merely passes through some buffer segment on the way to the
host. All data transfers to the host are in accordance with “buffer-full” ratio rules. See explanations associated with Mod page 02h (disconnect/reconnect control) in the SCSI Interface Product Manual*.
__________
*SCSI Interface Product Manual, P/N 77738479.
14
______________________________________________________________________________________
The following is a simplified description of a read operation with cache operation enabled:
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 drive 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 enabled, refer to section 5.5.2 for operation from this point.
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 enabled, refer to section 5.5.2 for operation from this point.
Each buffer segment is actually a self-contained circular storage (wr ap-around occurs), the length of which
is an integer number of disc medium sectors. The wrap-around 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 enabled), even when cache operation is
disabled (see section 5.5.2). For the Hawk 1 family the
Mode Select command, but the
selecting the segment
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 unchangeable
parameters (see SCSI I/O Product Manual*). The Hawk 1 family of drives supports operation of any integer
number of segments from 1 to 16. Divide the 245,760 b ytes in the b uff er b y the number of segments to get
the size (in bytes) of each segment.
number
size
specification. The size in Kbytes of each segment is reported by the Mode
Product Manual - Hawk 1 F amily SCSI-2 (Volume 1), Rev. D
number
can not be directly selected.
of segments may be selected using the
Size
is selected only as a by-product of
5.5.2 Prefetch operation
If the Prefetch feature is enabled, data in contiguous logical blocks on the disc immediately beyond that
which was requested by a Read command can be retriev ed and stored in the b uffer for immediate transfer
from the buffer to the host on subsequent Read commands that request those logical blocks (this is true
even if “cache” operation is disabled). Though the prefetch operation uses the buffer as a “cache”, finding
the requested data in the buffer is a prefetch “hit”, not a “cache” operation “hit”. 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 buffer segment(s), the host can limit the amount of
prefetch data to optimize system performance. The dr ive never prefetches more logical blocks than the
number specified in the prefetch logical blocks ceiling bytes (8 and 9) of Mode page 08h.
During a prefetch operation, the drive crosses a cylinder boundary to fetch more data
ity (DISC) bit is set to one in bit 4 of byte 2 of Mode parameters page 08h.
__________
*SCSI Interface Product Manual P/N 77738479.
only
if the Discontinu-
Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
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The operation of the prefetch feature (when enabled by DRA = 0) can be modified to an adaptable prefetch
mode, wherein prefetch is disabled as long as two sequential read operations are
of data. If two sequential Read operations request contiguous logical blocks of data, the drive automatically
enables the prefetch feature for the end of the second Read operation. As long as sequential Read operations request contiguous LB’s of data, pref etch oper ation remains enab led.
If the host uses software interleave, there will not likely ever be two sequential Read operations for contiguous LB’s, so the adaptiv e pref etch f eature k eeps pref etch disab led, e v en if the DRA bit enables it. Adaptive
prefetch is enabled when the IC (Initiator Control) bit (Mode page 08h, byte 2, bit 7) is set to 0 and when
DRA. = 0 (prefetch enabled).
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. F or write caching, the same buff er 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 disab led. When a write
command is issued, the cache is first checked to see if any logical blocks that are to be written are already
stored in the cache from a previous read or write command. If there are, the respective cache segments are
cleared. The new data is cached for subsequent Read commands.
not
for contiguous blocks
15
If the number of write data logical blocks exceeds the size 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. Howev er, the drive does not o verwrite data that
has not yet been written to the medium.
Tables 11.3.2-1 through 11.3.2-4 show Mode default settings for the Ha wk 1 family of drives.
5.7 Synchronized spindle operation
The synchronized spindles operation allows several drives operating from the same host to operate their
spindles at the same synchronized rotational rate. Drives operating in a system in synchronized mode
increase the system capacity and transfer rate in a cost effective manner.
The interface consists of a twisted pair cable that connects the drives in the synchronized system in a
daisychain configuration as shown in Figure 5.7-1. Master/slave operation is automatically set by the drives
in the system at power up time, or each drive in the system can be configured by the host (using a Mode
Select command*) to operate in either the master or slave mode. While loading heads after power up, a
drive checks for occurrences of the reference index signal (REFIND+). If there are no reference index
pulses occurring, the drive takes over as master and begins sending the reference index signal. Drives can
be re-configured by the host any time after power up to be master or slave by use of the Mode Select
command Rigid Disc Drive Geometry page.* The master provides the reference signal to which all other
drives phase lock, including the master . There is only one master per system, and that can be a drive or the
host computer. All drives may be configured as slaves allowing the host to pro vide the ref erence signal. All
drives default to the synchronized mode when powered up.
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*SCSI Interface Product Manual P/N 77738479.
16
Product Manual - Hawk 1 F amily SCSI-2 (Volume 1), Rev. D
______________________________________________________________________________________
Each drive can be configured for the non-synchronized mode in which it ignores any reference signal that
might be present. The connection of the synchronized ref erence signal to the host is required only if the host
is to provide the reference signal. If the host does not provide the reference signal, the host should not be
connected and the master should be drive #1. See Figure 5.7-1.
Master Sync
Source
Host
(or other drive)
SCSI Bus
System
Interface
J1
J1
37
[2]
37
[2]
Sync Interface
Spindle
Control
+5V
Drive 1
Spindle
Control
+5V
Drive 2
REFIND +
J6
6
5
R
T
R
T
[1]
J6
6
5
[1]
Spindle
37
[2]
Drive n
Control
+5V
R
J1
Notes:
[1] Configuration Select Header: (see Figure 10.1-1 and 10.2.1-1).
[2] This connection is only available on the "NC" models
Figure 5.7-1. Synchronized drive interconnect diagram
J6
6
5
T
[1]
Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
17
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The servo/read-write LSI on the master drive provides the reference signal (REFIND+). It is a 90.18 Hz
crystal generated signal. The signal is normally false/negated (nominal 0 V) and makes a transition to the
true/asserted (nominal +5 V) le vel to indicate the ref erence position during the revolution period. The trailing
(falling) edge of the reference signal is used by the master and the slave drives to phase lock their spindles.
A maximum of 10 seconds is allowed for a slave to synchronize with the reference signal. Figure 5.7-2
shows the characteristics of the reference signal.
T
1
REFIND +
0
0.5 usec min.
500 usec max.
T = 0.0111 second (+/- 1.0% max); +/- 10 usec cycle to cycle v ariance;
+/- 50 usec phase error while synchronized.
Figure 5.7-2. Synchronized reference signal characteristics
SCSI Interface Factors
The Rotational Position Locking (RPL) field in byte 17 (bits 0 and 1) of the Rigid Disc Drive Geometry mode
parameters page (page 04h) is used for enabling/disabling spindle synchronization mode*. If the target fails
to achieve synchronization, it shall create a unit attention to all initiators . The sense key shall be set to UNIT
ATTENTION and the additional sense code set to RPL STATUS CHANGE. However, in automatic arbitration mode, UNIT ATTENTION and the RPL STATUS CHANGE is not set.
If subsequent to achieving synchronization the target detects a change of synchronization:
1) and, if the logical unit is not presently ex ecuting an I/O process for the initiator, the target shall create a
unit attention condition. The sense key shall be set to UNIT ATTENTION and the additional sense code
set to RPL STATUS CHANGE.
2) and, if the logical unit is presently executing an I/O process and no other error occurs, the target shall
return CHECK CONDITION status. The sense k ey shall be set to RECO VERED ERR OR if the target is
able to complete the I/O process or HARDWARE ERROR if the target is unable to complete the I/O
process. The additional sense code is set to RPL STATUS CHANGE.
__________
*SCSI Interface Product Manual P/N 77738479.
18
______________________________________________________________________________________
The drive may be operated with a rotational ske w when synchronized. The rotational skew is applied in the
retarded direction (lagging the synchronized spindle master control). A rotational offset of up to 255/256 of
a revolution lagging ma y be selected. The amount of offset is set by using the Mode Select command, Rigid
Disc Drive Geometry page (page 04), byte 18*. The value in b yte 18 (0 - FFh) is the numerator of a fractional
multiplier that has 256 as the denominator. F or example, 40h selects 40h/100h or 1/4 of a re volution lagging
skew, 80h selects 1/2 revolution lagging skew and etc. Since the drive supports all offset values from 0 to
255, values sent by the initiator are not rounded off. The dr ive translation of the digital offset values to
physical rotational offsets results in offset values whose phase error lies within the + or - 50 usec phase
error with respect to the supplied 90.18 Hz reference signal.
The drive does not have the capability to adjust the rotational offset value requested by the initiator to a
physical offset in the drive that corresponds in any way to sector boundaries or changes in ZBR zones.
Such correspondences or changes, if required, must be formulated by the initiator in order for it to calculate
the value of offset it sends to the drive.
Product Manual - Hawk 1 F amily SCSI-2 (Volume 1), Rev. D
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*SCSI Interface Product Manual P/N 77738479.
Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
_____________________________________________________________________________________
19
6.0 Reliability specifications
The following reliability specifications assume correct host/drive operational interface, including all interface
timings, power supply voltages, and environmental 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 200,000 hours
Service Life 5 years
Preventive Maintenance None required
Note. [1]Error rate specified with automatic retries 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 Power 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.
14
bits transferred
21
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 verified as being written
correctly on the media.
b. All media defect induced errors must be excluded from error rate calculations.
6.1.2 Environmental interference
When evaluating systems operation under conditions of Electromagnetic Interference (EMI), the performance of the drive within the system shall be considered acceptable if the drive does not generate an
unrecoverable 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 provided through
the drive or SCSI interface; or
3. Is not capable of being recovered by normal drive or system recovery
procedures without operator intervention.
20
______________________________________________________________________________________
6.1.3 Write errors
Write errors can occur as a result of media defects, environmental interf erence, 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 drive, 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 track. 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 K ey. 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
Product Manual - Hawk 1 F amily SCSI-2 (Volume 1), Rev. D
6.2.1 Mean time between failure
The production disc drive shall achieve an MTBF of 200,000 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 for 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 preventive maintenance shall be required.
6.2.3 Service life
Estimated power-on operating hours in the period
Number of drive failures in the period
The drive shall have a useful service life of five years. Depot repair or replacement of major parts is permitted during the lifetime (6.2.4).
Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
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6.2.4 Service philosophy
Special equipment is required to repair the drive HDA. In order to achieve the above service life, repairs
must be performed only at a properly equipped and staffed service and repair facility. Troubleshooting and
repair of PCBs in the field is not recommended, because of the extensive diagnostic equipment required for
effective servicing. Also , there are no spare parts available for this drive . Drive warranty is v oided if the HDA
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 for highly trained personnel to integrate the drive into the OEM’s
system, whether in a factory or field environment.
The drive has been low level formatted at the factory and need not be reformatted.
6.2.6 Service tools
No special tools are required for site installation or recommended for site maintenance. Refer to Paragraph
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.
21
6.2.7 Product Warranty
Beginning on the date of shipment to customer and continuing for a period of five years, Seagate warrants
that each product (including components and sub-assemblies) or spare part that fails to function properly
under normal use due to defect in materials or 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.
22
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Product Manual - Hawk 1 F amily SCSI-2 (Volume 1), Rev. D
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 [5] +5% +5%[2] +5% +5%[2]
Maximum Operating Current [1] 0.88 A 1.0 A 1.08 A 1.0 A
Average Idle Current [1] [3] 0.48 A 0.55 A 0.63 A 0.55 A
Maximum Starting Current (Peak) 0.88 A 2.0 A 0.98 A 2.0 A
Delayed Motor Start (Max) [4] 0.68 A 0.7 A 0.68 A 0.7 A
Peak Operating Current [6]
T yp . [1] 0.72 A 0.60 A 0.7 A 0.60 A
Max. [1] 0.88 A 1.0 A 1.08 A 1.0 A
Max. (Peak) - 2.0 A - 2.0 A
____________________________________________________________________________________
[1] Measured with average reading DC ammeter. Instantaneous +12 V current peaks will exceed these
values.
[2] A -10% tolerance is permissible during power up. The +5% must be maintained after the driv e signifies
that its power up sequence has been completed and that the drive is able to accept selection by the
Host Initiator.
[3] See +12 V current profile level T6 in Figure 7.2.2-1.
[4] This condition occurs when the Motor Start Option is enabled and the drive has not yet received a Start
Motor command.
[5] See paragraph 7.2.1 “Conducted Noise Immunity”.
[6] Instantaneous peaks less than 5 msec. in duration are allowed.
____________________________________________________________________________________
General Notes from Table 7.2-1:
1. At powerup, the motor current regulator limits the 12 volt current to a peak value of less than 2.0
amperes, although instantaneous peaks may e xceed 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 operating current
shown.
4. The +5 and +12 volt supplies shall employ separate ground 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 1 Family SCSI-2 (Volume 1), Rev. D
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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 100 kHz and 45 mA pp from
100 kHz to 10 MHz.
+12 V = 150 mV pp from 0 to 100 kHz and 60 mA pp from
100 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. Daisychain 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:
23
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 T able 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.
24
Product Manual - Hawk 1 F amily SCSI-2 (Volume 1), Rev. D
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Note. All times and currents are typical. See Table 7.2-1 for maximum current requirements.
1.0
5V
Current
CH1 GND
.5
T3
T1
2.0
1.5
12V
Current
1
.5
CH2 GND
Figure 7.2.2-1. Typical ST11200N/ND/NC family drive +5 V and +12 V current profile
T
02468
T2
Seconds
T4
T5
10 12 14 16 18
T6
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 w atts (37.5 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 ha ving differential interf ace circuits, typical operating pow er dissipation is 13 watts (44 BTUs per
hour) of DC power av erage at nominal v oltages . Typical power dissipation under idle conditions is 10 watts
(34.2 BTUs per hour).
Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
25
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7.4 Environmental limits
Temperature and humidity values experienced by the drive must be such that condensation does not occur
on any drive part. Altitude and atmospheric pressure specifications are referenced to a standard day at
58.7°F (14.8°C). Maxim um Wet Bulb temperature is 82°F (28°C).
7.4.1 Temperature
a. Operating
The drive meets all specifications over a 41°F to 122°F (5°C to 50°C) drive ambient temperature range
with a maximum gradient of 36°F (20°C) per hour. The enclosure for the driv e should be designed such
that the temperatures at the locations specified in Table 7.4.1-1, column 1 are not exceeded. Air flow
may be needed to achieve these temperature values. Operation at case temperatures above these
values may adversely affect 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 50°C or 5°C may occur without impact to
specified MTBF. T o achieve the specified MTBF, the values of Table 7.4.1-1 Column 2 must be considered maximum average operating case temperatures. Air flow may be needed to achieve these temperatures. Continual or sustained operation at case temperatures above these values may degrade
MTBF.
Table 7.4.1-1. PCB and HDA temperatures
Items Column 1 Column 2
in Maximum Case Typical Case
Figure Temperatures (oC) Temperatures (oC)
7.4.1-1 Operating at 35°C Ambient
HDA 60 49
U1 78 65
U3 80 67
U5 68 55
U6 72 58
VR1 63 50
U7 (Differential) 70 54
Note: The temperatures in Column 2 were measurements made with an air flow of 1 ft/sec through the
drive at a pressure of one atmosphere.
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
for use with the drive.
26
Product Manual - Hawk 1 F amily SCSI-2 (Volume 1), Rev. D
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HDA
SEAGATE
Single Ended I/O PCB * Differential I/O PCB *
U2Ø
U17
U18
U25
U21
U16
U19
U15
U9
U11
U8
VR1
U7U2
J1
U3
J4
U4
U1
U6
U5
[1]
U12
[1]
U2Ø
U17
U18
U25
U21
U16
U19
U15
U9
U11
U8
U2
J1
U3
U4
U6
U5
U7
* Bottom side of PCB
Notes:
[1] "NC" models have an 80 pin I/O connector (50 pin connecctor is shown) and does not
have VR1. Other components are the same.
J4
U1
Figure 7.4.1-1. Locations of components listed in Table 7.4.1-1
Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
_____________________________________________________________________________________
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.
27
The limits of shock and vibration defined within this document are specified with the drive mounted by any
of the four methods shown in Figure 7.4.4-1. Orientation of the side nearest the LED may be up or down,
though the figure shows it 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 sinewave). Shock 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
sinewave) shall not exhibit device damage or performance degradation. Shock may be applied in the X,
Y, or Z axis.
c. Packaged
The drive packaged in a single or multiple drive pack of gross weight 20 pounds (8.95 kg) or less by
Seagate for general freight shipment shall withstand drop test from heights listed below against a concrete floor or equivalent. For additional details refer to specifications 30190-001 (under 100 lbs) or
30191-001 (over 100 lbs).
Package Size Drop Height
600 - 1800 in3 (9,832 - 29,502 cm3) 48 in (121 cm)
>1800 in3 (>29,502 cm3) 42 in (106 cm)
28
Product Manual - Hawk 1 F amily SCSI-2 (Volume 1), Rev. D
______________________________________________________________________________________
SEAGATE
1
B
1
B
1
A
A
B
1
A
B
E
A
D
X
Z
E
Y
1
C
1
D
SEAGATE
E
1
D
1
C
1
C
1
Z
Y
X
E
D
C
Figure 7.4.4-1. Recommended mounting
Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
_____________________________________________________________________________________
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 @ 0.040 inches (1.03 mm) displacement peak-to-peak
22-400 Hz @ 1.0 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 peak-to-peak
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.
29
7.5 Electromagnetic compatibility
7.5.1 Electromagnetic susceptibility
As a component assembly, the drive is not required to meet any 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 Power Requirements.
30
Product Manual - Hawk 1 F amily SCSI-2 (Volume 1), Rev. D
______________________________________________________________________________________
7.6 Mechanical specifications
The following nominal dimensions are exclusive of the decorative front panel accessory. Refer to Figure
7.6-1 for detailed mounting configuration dimensions.
Height: 1.62 in 41.1 mm
Width: 4.00 in 101.6 mm
Depth: 5.74 in 145.8 mm
Weight: 1.9 pounds 0.84 kilograms
[4]
[3]
C
[1]
A
B
J
[2]
H
K
N
[4]
M
G
F
D
E
Notes:
Mounting holes three on each side, 6-32 UNC. Max
[1]
screw length into side of drive 0.15 in. (3.81 mm).
Screw tightening torque 8.0 in-lb max with minimum
thread engagement of .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 8.0 in-lb max with minimum
thread engagement of .12 in (3.00 mm).
Power and interface connections can extend past the
[3]
"A" dimension by 0.040 in (1.02 mm).
Decorative front panel.
[4]
5.74
A
4.00
B
1.620
C
2.362
D
.620
E
4.000
F
.250
G
1.750
H
3.750
J
2.370
P
K
1.725
L
4.100
M
0.19
N
0.015
P
L
Inches Millimeters
41.15
60.00
15.75
6.35
44.45
95.25
60.20
43.82
4.83
0.381
±
±
+
–
±
±
±
±
±
±
±
±
±
±
max
±
±
+
–
±
±
±
±
±
±
±
±
±
±
max
0.010
0.010
0.026
0.021
0.010
0.010
0.010
0.018
0.010
0.010
0.010
0.010
0.010
0.010
145.80
101.60
101.60
104.14
.25
.25
.66
.53
.25
.25
.25
.46
.25
.25
.25
.25
.25
.25
Figure 7.6-1a. Mounting configuration dimensions ("N" annd "ND" model drives)
Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
31
_____________________________________________________________________________________
[4]
[3]
C
[1]
Drive Centerline
R
R ST
Connector Centerline
[2]
H
K
N
[4]
G
L
D
F
E
A
Notes:
Mounting holes three on each side, 6-32 UNC. Max
[1]
screw length into side of drive 0.15 in. (3.81 mm).
Screw tightening torque 8.0 in-lb max with minimum
thread engagement of .12 in (3.00 mm).
Mounting holes four on bottom, 6-32 UNC. Max
[5]
B
J
[2]
screw length into bottom of drive 0.20 in. (5.08 mm).
Screw tightening torque 8.0 in-lb max with minimum
thread engagement of .12 in (3.00 mm).
Power and interface connections can extend past the
[3]
"A" dimension by 0.040 in (1.02 mm).
Decorative front panel.
[4]
Connector is centered (side to side) on drive within
[5]
± 0.020 in (.508 mm).
Inches Millimeters
A
B
C
D
E
F
G
H
J
K
L
M
P
N
P
R
M
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
0.181
±
±
+
–
±
±
±
±
±
±
±
±
±
±
max
+
–
0.010
0.010
0.026
0.021
0.010
0.010
0.010
0.018
0.010
0.010
0.010
0.010
0.010
0.010
0.018
0.013
145.80
101.60
41.15
60.00
15.75
101.60
44.45
95.25
60.20
43.82
104.14
6.35
4.83
0.381
4.597
±
±
+
–
±
±
±
±
±
±
±
±
±
±
max
+
–
.25
.25
.66
.53
.25
.25
.25
.46
.25
.25
.25
.25
.25
.25
.45
.33
Figure 7.6-1b. Mounting configuration dimensions for "NC" model drives
32
______________________________________________________________________________________
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 le vel) 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.
7.6.3 Drive Mounting
When mounting the drive using the bottom holes care must be taken to ensure that the drive is not physically distorted due to a stiff non-flat mounting surface. The allowable mounting surface stiffness is 80 lb/in.
The following equation and paragraph define the allo w ab le mounting surface stiffness:
where 'k' represents the mounting surface stiffness (units of lb/in), and, 'x' represents the out-of plane
mounting surface distortion (units of inches). The out-of plane distor tion ('x') is deter mined by defining a
plane with three of the four mounting points fixed and evaluating the out-of plane deflection of the fourth
mounting point when a known force is applied to the fourth point.
Product Manual - Hawk 1 F amily SCSI-2 (Volume 1), Rev. D
k*x = 80 lb
Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
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33
8.0 Media characteristics
8.1 Media description
The media used on the drive has a diameter of approximately 95 mm (approximately 3.7 inches). The
aluminum substrate is coated with a thin film magnetic material and overcoated with a proprietary protective
layer for improved durability and environmental protection.
34
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Product Manual - Hawk 1 F amily SCSI-2 (Volume 1), Rev. D
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 involves 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 defects list tracks (referred to as the primary or ETF defect list).
These known defects are reallocated during the initial drive format operation at the f actory . (See F ormat Unit
command Section 5.2.1.2 in SCSI-2 Interface Product Manual P/N 77738479*). Data correction by ECC is
applied to recover data from additional flaws if the y occur.
Details of the SCSI commands supported by the drive are described in SCSI-2 Product Interface Manual,
P/N 77738479. Also, more information on the drive Error Reco v ery philosophy is presented in Section 6 of
the SCSI-2 Interface Product Manual.
9.2 SCSI systems error considerations
Information on the reporting of operational errors or faults across the interface is given in SCSI-2 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-2 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.
Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
35
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10.0 Option/configuration headers
10.1 Drive ID/option select header
Figures 10.1-1a and 10.1-1b show a bottom view of the drive (PCB toward viewer) 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.
Side View of Drive
Pin 1
J5
A2A1A
SCSI ID = 0
SCSI ID = 1
SCSI ID = 2
SCSI ID = 3
SCSI ID = 4
SCSI ID = 5
SCSI ID = 6
SCSI ID = 7
HDA
J1
0
SCSI ID = 0
SCSI ID = 1
SCSI ID = 2
SCSI ID = 3
SCSI ID = 4
SCSI ID = 5
Drive with HDA up,
PCB down,
viewed from front
HDA
A2A1A
Pin 1
S
L
S
E
P
0
D
SCSI I/O
Connector
Pin 1
Pin 1
End
J6
Drive Front
J6
R
E
S
DC Power
Connector
J2
J2
R
Jumper
Positions
E
D
S
S
M
W
P
E
P
E
J5
J1
Pin 1
R
E
T
T
S
P
P
Delay
Motor Start
Enable
Motor Start
Write
Protect
Parity Option
Term. Power
from Drive
Term. Power
to SCSI Bus
Term. Power
from SCSI Bus
PCB part number
label here
SCSI ID = 6
SCSI ID = 7
Sync
Spindle
Remote
LED
5
6
GND
REFIND+
3
4
Position A
CATH
Figure 10.1-1a. ST11200N/ND family drive ID and option select header for early drives having PCB
P/N’s 75782395 and 75782485.
36
Product Manual - Hawk 1 F amily SCSI-2 (Volume 1), Rev. D
______________________________________________________________________________________
SCSI I/O
Connector
Pin 1
J5
[2]
J1
Side View of Drive
Pin 1
J5
[2]
HDA
J1
Drive with HDA up,
PCB down,
viewed from front
Pin 1
End
J6
Drive Front
[1]
[2]
SCSI ID = 0
A0A1A
2
HDA
Pin 1
DC Power
Connector
J2
J6
SCSI ID = 1
A2A1A
SCSI ID = 2
SCSI ID = 0
SCSI ID = 3
SCSI ID = 1
SCSI ID = 4
S
L
R
S
E
0
E
P
D
S
Positions
Jumper
J2
R
E
D
M
S
S
E
R
W
P
E
P
T
E
S
P
Pin 1
T
P
Reserved
SCSI ID = 2
SCSI ID = 5
SCSI ID = 6
SCSI ID = 7
SCSI ID = 3
SCSI ID = 4
SCSI ID = 5
Delay
Motor Start
Enable
Motor Start
Write Protect
Parity Option
SCSI ID = 6
Term. Power
SCSI ID = 7
Sync
Spindle
Remote
LED
5
6
GND
REFIND +
3
4
from Drive
Term. Power
to SCSI Bus
Term. Power
from SCSI Bus
Position A
CATH
Notes:
[1] PCB part number label here
[2] "NC" models do not have connector J5, and have a single 80 pin combined SCSI I/O and DC power connectorr
instead of the normal 50 pin SCSI I/O and 4 pin DC power connectors. Included among the 80 pins are the SCSI
ID, Motor Start and Delayed Motor Start select functions, and the synchronous spindle master sync signal and
the remote LED signals. Do not use J2 and J6 for these five functions if the host uses the ones included in the 80
pin connector. See Table 11.6.3-1c for a list of pin numbers vs. signals for the 80 pin connector.
Figure 10.1-1b. ST11200N/ND/NC family drive ID and option select header for new PCB’s
Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
_____________________________________________________________________________________
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 “def ault” 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.
J2
Jumper
Installation Jumper Function Description
RES
Off/On Reserved. Default is no jumper installed.
DS ME
Off Off Spindle starts immediately after power up - Default setting.
Off On Drive spindle does not start until Start Unit command received from host.
On Off Spindle Startup is delayed by SCSI ID times 12 seconds after power is applied, i.e., drive 0
spindle starts immediately when DC power connected, drive 1 starts after 12 second delay ,
drive 2 starts after 24 second delay, etc.
On On Drive spindle starts when Start Unit command received from host. Delayed start feature is
overridden and does not apply when ME jumper is installed.
37
WP
On Entire drive is write protected.
Off Drive is not write proteccted. Default is no WP jumper installed.
PE
On Parity checking and parity error reporting by the drive is enabled.
Off Drive does not report result of parity checking to host. Default is no PE jumper installed.
RES
Off/On Reserved for factory use only. 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 teminator 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 ST11200ND drive has diff erential
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.
TP Position A
On This horizontally positioned jumper across the two TP positions nearest PCB edge, con-
nects terminator power from SCSI bus I/O pin 26 to the drive’s inter nal terminators (for
single-ended I/O only).
Off See above explanations for TP jumpers.
38
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Product Manual - Hawk 1 F amily SCSI-2 (Volume 1), Rev. D
continued from previous page
J5
Jumper
Installation Jumper Function Description
1, 2, 3 Drive ID on SCSI Bus (J6 may be used instead). The drive ID is binary coded position-
*(A2,A1,A0) wise i.e., jumper in position A2 is drive ID 4, in position A1 is ID 2, position A0 is ID 1 and
**(A0,A1,A2) no jumpers is ID 0. Default is ID = 0.
J5 does not exist on "NC" model drives. The drive ID signals are in the 80 pin I/O connector
and on J6.
J6
Jumper
Installation Jumper Function Description
1, 2, 3 Drive ID on SCSI bus. Either J5 or J6 (optional) may be used to select
(A2,A1,A0) 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. On "NC" model
drives, drive ID signals are also included in the 80 pin I/O connector.
SSP No jumper ever installed. Used only as a cable connection for the reference index signal
(REFIND+) (J6 Pin 6, bottom) for sync spindle feature. J6 pin 5 is GRD. See paragraphs
10.2, 5.7 for description of synchronized spindle operation.
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.
RES Reserved position. No jumper to be installed.
* Address jumper position significance for old PCB’s, P/N’s 75782395 and 75782485
(Figure 10.1-1a).
** Address jumper position significance for newer PCB’s (Figure 10.1-1b).
Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
39
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10.2 Synchronized spindles interface
The Synchronized Spindles Interface (SSI) allows several drives operating from the same host to operate
their spindles at a synchronized rotational rate. Details of the electrical and physical interfaces follow in
paragraphs 10.2.1 and 10.2.1.2 and 10.2.1.3. The system operation is described in paragr aph 5.7.
10.2.1 Electrical description
The electrical interface consists of one digital TTL reference index signal and ground. The reference inde x
signal (REFIND+) is an output if the drive is configured as a master and is an input otherwise. The reference
index signal is connected from drive to drive in a daisychain fashion as shown in Figure 5.7-1.
10.2.1.1 Drivers and receivers
Figure 10.2.1-1 shows a diagram of the driver/receiver circuit. The driver circuits have the f ollowing electrical specifications.
Negated (False): 0.0 V to +0.4 V @ I = - 48 mA (max).
Asserted (T rue): +2.24V to +5.25 V @ I = +250 uA.
Main PCB
Driver Receiver
7.5K Ohm
+5V
SYNC
REFIND +
Notes:
[1] This connection is found only on "NC" drive models
Figure 10.2.1-1. SCSI reference index signal driver/receiver combination
J1 - 37 [1]
J6 - 6
J6 - 5
GND
__________
*See paragraph 10.2.1.2
40
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10.2.1.2 Termination
The reference index signal (REFIND+) is terminated with a 7.5 K ohm resistor . Each drive has a termination
resistor located on the Main PCB. The terminator resistor is not removable and is always in the circuit.
10.2.1.3 Physical interface
The dimensions of the connector (J6) mounted on the Main PCB to interconnect the drives is shown in
Figure 10.2.1-2. It is a 12 pin, 6 jumper position gold header type connector. Only pins 5 and 6 are used for
connecting the Reference Index signal cable, as shown in Figure 10.2.1-2. Pin 6 is REFIND+ and Pin 5 is
ground.
.485 max
.020 +/- .001
(square)
.157
+/- .010
.0787
typ
.394 +/- .010
Figure 10.2.1-2. Configuration select header specification. (Connector used has 12 pins).
.0787 typ
.157
+/- .010
.236 max
.090
-.128
.048 min
.033 +/- .004
The interface physical characteristics f or the "NC" models are given in Figure 11.6.3-1b and T ab le 11.6.3-1c.
The "Sync" signal is included among the 80 pins of the I/O connector.
10.3 Grounding
Signal ground (PCB) and HDA ground are connected together in the Hawk 1 drive 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 HDA/
PCB ground, the systems integrator or user must provide a nonconductive (electrically isolating) method of
mounting the drive in the host equipment.
Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
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41
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 give the Hawk 1 Family driv es version of the SCSI implementation described in the 77738479 document.
11.2 SCSI interface messages supported
T a ble 11.2-1 following lists the messages supported by the SCSI-1 and SCSI-2 modes of the Hawk 1 F amily
drives.
Table 11.2-1. SCSI messages supported by ST11200N/ND family drives
Msg Supported by:
Code SCSI-1 SCSI-2Message Name
01h*** Y Y Extended messages
06h Y Y Abort
0Dh Y Y Abort tag
0Ch Y Y Bus device reset
0Eh N Y Clear queue
00h Y Y Command complete
04h Y Y Disconnect
80h-FFh Y Y Identify
23h N N Ignore wide residue (two bytes)
0Fh N N Initiate recovery
05h Y Y Initiator detected error
0Ah N N Linked command complete
0Bh N N Linked command complete with flag
09h Y Y Message parity error
07h Y Y Message reject
*** N Y Modify data pointer
08h Y Y No operation
Queue tag messages (two bytes)
21h N Y Head of queue tag
22h N Y Ordered queue tag
20h N Y Simple queue tag
10h N N Release recovery
03h Y Y Restore pointers
02h Y Y Save data pointer
*** Y Y Synchronous data transfer req.
11h N N Terminate I/O process
*** N N Wide data transfer request
***Extended messages (see P/N 77738479 SCSI Interface Product Manual).
42
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11.3 SCSI interface commands supported
Table 11.3-1 following lists the SCSI interface commands that are supported in the SCSI-1 and SCSI-2
modes of the drive. Hawk 1 Family drives can be changed back and forth between SCSI-1 and SCSI-2
modes using the Change Definition Command. OEM standard drives are shipped set to operate in SCSI-2
mode.
Table 11.3-1. Commands supported by Hawk 1 family drives
Com’d Supported by:
Code SCSI-1 SCSI-2 Command Name
00h Y Y Test unit ready
01h Y Y Rezero unit
03h Y Y Request sense
Y Y Extended sense
Y Y Field pointer bytes
N N Actual retry count bytes
04h Y Y Format unit [1]
07h Y Y Reassign blocks
08h Y Y Read
0Ah Y Y Write
0Bh Y Y Seek
12h Y Y Inquiry
N Y Vital product data page
N Y Unit serial number page
N Y Implemented operating def. page
N Y Firmware numbers page
N Y Date code page
N Y Jumper settings page
15h Y Y Mode select (same pages as mode
sense command see below)
16h Y Y Reserve
Y Y 3rd parity 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 V erify error reco very page (07h)
Y Y Caching parameters page (08h)
N Y Control mode page (0Ah)
N Y Notch and Partition Page (0C) (Media Zones)
[1] Hawk 1 can format to any even number of bytes per sector from 256 to 4096.
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43
continued from previous page
Com’d Supported by:
Code SCSI-1 SCSI-2 Command Name
1Bh Y Y Start unit/stop unit
1Ch Y Y Receive diagnostic results
1Dh Y Y Send diagnostics page
Y Y Supported diagnostics pages
Y Y Translate 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 N N Search data high
31h N N Search data equal
32h N N Search data low
33h N N Set limits
34h N N Prefetch
35h N Y 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 buff er [1]
3Ch Y Y Read buffer [1]
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 N Y Log select
4Dh N Y LOG SENSE
4E-54 N N NOT USED
55h N Y MODE SELECT (10)
56-59 N N NOT USED
5Ah N 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
[1] If cache is enabled (RCD = 0 in Mode Sense Page 08h), Byte Transf er Length is 245,756 bytes plus
a 4 byte header .
If cache is disabled (RCD = 1), Byte Transfer length is 245,756 bytes plus a 4 byte header.
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11.3.1 Inquiry data
11.3.1.1 Standard 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. Hawk 1 family drive standard inquir y data
Bytes Data (Hex)
0-15 00 00 ** *** 8F 00 00 12 53 45 41 47 41 54 45 20 Vendor ID
16-31 53 54 [31][31][32] [30][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* 32* 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#
*Copyright Year - changes with actual year.
Notes.
** 01 means SCSI-1 implemented;
02 means SCSI-2 implemented. ST11200N/ND/NC F amily drives can be changed between these two
configurations. Default is 02.
*** 01 means response data is in SCSI-1 format and has compatability with Common Command Set
data.
02 means response data is in SCSI-2 format. The drive can be changed betw een these two configurations. Default is 02.
R# Four ASCII digits representing the last four digits of the product Firmware Release number. This
information is also given in page C0h of the Vital Product data.
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 hex values for ST11200N. Codes for
ST1980N drive are 31, 39, 38, 30, 4E.
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 sev er al Vital Product
Data pages by setting the Inquiry command EVPD bit to one. The SCSI, V ersion 2 Interface Product Man ual
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.
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11.3.2 Mode sense data
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 implementation (see SCSI Interface Product Manual, P/N 77738479).
DEFINITIONS:
DEF = Default value. Standard drives are shipped configured this way.
CHG = Changeable bits; indicates if default value is changeable.
Table 11.3.2-1. Mode sense data, ST11200 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 00 08
Data 00 00 00 00 00 00 02 00
Mode
Page MODE PAGE HEADERS AND PARAMETER DATA BYTES
Def
01 81 06 00 1B 30 00 00 FF
CHG
01 00 06 EF FF 00 00 00 00
DEF
02 82 0A 80 80 00 0A 00 00 00 00 00 00
CHG
02 00 0A FF FF 00 00 00 00 00 00 00 00
DEF
03 83 16 00 0F 00 0C 00 00 00 1E 00 4A 02 00 00 01 00 0D 00 15 40 00 00 00
CHG
03 00 16 FF FF FF FF 00 00 FF FF 00 00 00 00 FF FF 00 00 00 00 00 00 00 00
DEF
04 84 12 00 07 50 0F 00 00 00 00 00 00 00 00 00 00 00 00 00 00
CHG
04 00 12 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03 FF 00
DEF
08 88 12 10 00 FF FF 00 00 FF FF FF FF 80 03 00 00 00 00 00 00
CHG
08 00 12 BD 00 FF FF FF FF FF FF 00 00 A0 FF FF FF 00 00 00 00
DEF
00 80 02 00 00
CHG
00 00 02 76 00
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Table 11.3.2-2. Mode sense data, ST11200 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 9F 00 00 08
Data 00 00 00 00 00 00 02 00
Mode
Page MODE PAGE HEADERS AND PARAMETER DATA BYTES
DEF
01 81 0A 00 1B 30 00 00 00 03 00 FF FF
CHG
01 00 0A 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 0E FF FF 00 00 00 00 00 00 00 00 80 00 00 00
DEF
03 83 16 00 0F 00 0C 00 00 00 1E 00 4A 02 00 00 01 00 0D 00 15 40 00 00 00
CHG
03 00 16 FF FF FF FF 00 00 FF FF 00 00 00 00 FF FF 00 00 00 00 00 00 00 00
DEF
04 84 16 00 07 50 0F 00 00 00 00 00 00 00 00 00 00 00 00 00 00 15 23 00 00
CHG
04 00 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03 FF 00 00 00 00 00
DEF
07 87 0A 00 1B 30 00 00 00 00 00 FF FF
CHG
07 00 0A 0F FF 00 00 00 00 00 00 00 00
DEF
08 88 12 10 00 FF FF 00 00 FF FF FF FF 80 03 00 00 00 00 00 00
CHG
08 00 12 BD 00 FF FF FF FF FF FF 00 00 A0 FF FF FF 00 00 00 00
DEF
0A 8A 0A 00 10 00 00 00 00 00 00 00 00
CHG
0A 00 0A 03 01 00 00 00 00 00 00 00 00
DEF
0C 8C 16 80 00 00 17 00 00 00 00 00 00 00 07 4D 0E 00 00 00 00 00 00 10 00
CHG
0C 00 16 40 00 00 00 FF FF 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
DEF
00 80 02 00 00
CHG
00 00 02 76 00
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Table 11.3.2-3. Mode sense data, ST1980 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 00 08
Data 00 00 00 00 00 00 02 00
Mode
Page MODE PAGE HEADERS AND PARAMETER DATA BYTES
DEF
01 81 06 00 1B 30 00 00 FF
CHG
01 00 06 EF FF 00 00 00 00
DEF
02 82 0A 80 80 00 0A 00 00 00 00 00 00
CHG
02 00 0A FF FF 00 00 00 00 00 00 00 00
DEF
03 83 16 00 01 00 01 00 00 00 1A 00 4B 02 00 00 01 00 0D 00 15 40 00 00 00
CHG
03 00 16 FF FF FF FF 00 00 FF FF 00 00 00 00 FF FF 00 00 00 00 00 00 00 00
DEF
04 84 12 00 06 C2 0D 00 00 00 00 00 00 00 00 00 00 00 00 00 00
CHG
04 00 12 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03 FF 00
DEF
08 88 12 10 00 FF FF 00 00 FF FF FF FF 80 03 00 00 00 00 00 00
CHG
08 00 12 BD 00 FF FF FF FF FF FF 00 00 A0 FF FF FF 00 00 00 00
DEF
00 80 02 00 00
CHG
00 00 02 76 00
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Table 11.3.2-4. Mode sense data, ST1980 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 9F 00 00 08
Data 00 00 00 00 00 00 02 00
Mode
Page MODE PAGE HEADERS AND PARAMETER DATA BYTES
DEF
01 81 0A 00 1B 30 00 00 00 03 00 FF FF
CHG
01 00 0A 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 0E FF FF 00 00 00 00 00 00 00 00 00 00 00 00
DEF
03 83 16 00 01 00 01 00 00 00 1A 00 4B 02 00 00 01 00 0D 00 15 40 00 00 00
CHG
03 00 16 FF FF FF FF 00 00 FF FF 00 00 00 00 FF FF 00 00 00 00 00 00 00 00
DEF
04 84 16 00 06 C2 0D 00 00 00 00 00 00 00 00 00 00 00 00 00 00 15 23 00 00
CHG
04 00 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03 FF 00 00 00 00 00
DEF
07 87 0A 00 1B 30 00 00 00 00 00 FF FF
CHG
07 00 0A 0F FF 00 00 00 00 00 00 00 00
DEF
08 88 12 10 00 FF FF 00 00 FF FF FF FF 80 03 00 00 00 00 00 00
CHG
08 00 12 BD 00 FF FF FF FF FF FF 00 00 A0 FF FF FF 00 00 00 00
DEF
0A 8A 0A 02 10 00 00 00 00 00 00 00 00
CHG
0A 00 0A 03 01 00 00 00 00 00 00 00 00
DEF
0C 8C 16 80 00 00 17 00 00 00 00 00 00 00 06 BF 0C 00 00 00 00 00 00 10 00
CHG
0C 00 16 40 00 00 00 FF FF 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
DEF
00 80 02 00 00
CHG
00 00 02 76 00
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Table 11.3.2-5. Mode sense data, ST1950 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 9F 00 00 08
Data 00 00 00 00 00 00 02 00
Mode
Page MODE PAGE HEADERS AND PARAMETER DATA BYTES
DEF
01 81 0A 00 1B 30 00 00 00 03 00 FF FF
CHG
01 00 0A 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 0E FF FF 00 00 00 00 00 00 00 00 00 00 00 00
DEF
03 83 16 00 01 00 01 00 00 00 1A 00 4D 02 00 00 01 00 0D 00 15 40 00 00 00
CHG
03 00 16 FF FF FF FF 00 00 FF FF 00 00 00 00 FF FF 00 00 00 00 00 00 00 00
DEF
04 84 16 00 06 28 0D 00 00 00 00 00 00 00 00 00 00 00 00 00 00 15 23 00 00
CHG
04 00 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03 FF 00 00 00 00 00
DEF
07 87 0A 00 1B 30 00 00 00 00 00 FF FF
CHG
07 00 0A 0F FF 00 00 00 00 00 00 00 00
DEF
08 88 12 10 00 FF FF 00 00 FF FF FF FF 80 03 00 00 00 00 00 00
CHG
08 00 12 BD 00 FF FF FF FF FF FF 00 00 A0 FF FF FF 00 00 00 00
DEF
0A 8A 0A 02 10 00 00 00 00 00 00 00 00
CHG
0A 00 0A 03 01 00 00 00 00 00 00 00 00
DEF
0C 8C 16 80 00 00 17 00 00 00 00 00 00 00 06 25 0C 00 00 00 00 00 00 10 00
CHG
0C 00 16 40 00 00 00 FF FF 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
DEF
00 80 02 00 00
CHG
00 00 02 76 00
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Table 11.3.2-6. Mode sense data, ST1950 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 00 08
Data 00 00 00 00 00 00 02 00
Mode
Page MODE PAGE HEADERS AND PARAMETER DATA BYTES
Def
01 81 06 00 1B 30 00 00 FF
CHG
01 00 06 EF FF 00 00 00 00
DEF
02 82 0A 80 80 00 0A 00 00 00 00 00 00
CHG
02 00 0A FF FF 00 00 00 00 00 00 00 00
DEF
03 83 16 00 01 00 01 00 00 00 1A 00 4D 02 00 00 01 00 0D 00 15 40 00 00 00
CHG
03 00 16 FF FF FF FF 00 00 FF FF 00 00 00 00 FF FF 00 00 00 00 00 00 00 00
DEF
04 84 12 00 06 28 0D 00 00 00 00 00 00 00 00 00 00 00 00 00 00
CHG
04 00 12 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03 FF 00
DEF
08 88 12 10 00 FF FF 00 00 FF FF FF FF 80 03 00 00 00 00 00 00
CHG
08 00 12 BD 00 FF FF FF FF FF FF 00 00 A0 FF FF FF 00 00 00 00
DEF
00 80 02 00 00
CHG
00 00 02 76 00
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Table 11.3.2-7. Mode sense data, ST1830 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 9F 00 00 08
Data 00 00 00 00 00 00 02 00
Mode
Page MODE PAGE HEADERS AND PARAMETER DATA BYTES
DEF
01 81 0A 00 1B 30 00 00 00 03 00 FF FF
CHG
01 00 0A 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 0E FF FF 00 00 00 00 00 00 00 00 00 00 00 00
DEF
03 83 16 00 01 00 01 00 00 00 1A 00 50 02 00 00 01 00 0D 00 15 40 00 00 00
CHG
03 00 16 FF FF FF FF 00 00 FF FF 00 00 00 00 FF FF 00 00 00 00 00 00 00 00
DEF
04 84 16 00 05 2E 0D 00 00 00 00 00 00 00 00 00 00 00 00 00 00 15 23 00 00
CHG
04 00 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03 FF 00 00 00 00 00
DEF
07 87 0A 00 1B 30 00 00 00 00 00 FF FF
CHG
07 00 0A 0F FF 00 00 00 00 00 00 00 00
DEF
08 88 12 10 00 FF FF 00 00 FF FF FF FF 80 03 00 00 00 00 00 00
CHG
08 00 12 BD 00 FF FF FF FF FF FF 00 00 A0 FF FF FF 00 00 00 00
DEF
0A 8A 0A 02 10 00 00 00 00 00 00 00 00
CHG
0A 00 0A 03 01 00 00 00 00 00 00 00 00
DEF
0C 00 16 80 00 00 17 00 00 00 00 00 00 00 05 2B 0C 00 00 00 00 00 00 10 00
CHG
0C 00 16 40 00 00 00 FF FF 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
DEF
00 80 02 00 00
CHG
00 00 02 76 00
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Table 11.3.2-7. Mode sense data, ST1830 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 00 08
Data 00 00 00 00 00 00 02 00
Mode
Page MODE PAGE HEADERS AND PARAMETER DATA BYTES
DEF
01 81 06 00 1B 30 00 00 FF
CHG
01 00 06 EF FF 00 00 00 00
DEF
02 82 0A 80 80 00 0A 00 00 00 00 00 00
CHG
02 00 0A FF FF 00 00 00 00 00 00 00 00
DEF
03 83 16 00 01 00 01 00 00 00 1A 00 50 02 00 00 01 00 0D 00 15 40 00 00 00
CHG
03 00 16 FF FF FF FF 00 00 FF FF 00 00 00 00 FF FF 00 00 00 00 00 00 00 00
DEF
04 84 12 00 05 2E 0D 00 00 00 00 00 00 00 00 00 00 00 00 00 00
CHG
04 00 12 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03 FF 00
DEF
08 88 12 10 00 FF FF 00 00 FF FF FF FF 80 03 00 00 00 00 00 00
CHG
08 00 12 BD 00 FF FF FF FF FF FF 00 00 A0 FF FF FF 00 00 00 00
DEF
00 80 02 00 00
CHG
00 00 02 76 00
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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
N 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
Y Y Synchronized (locked) Spindle Operation
Y Y Differential Interface Circuits available
Y Y Segmented Caching
N Y Zero Latency Read
N Y Queue tagging (up to 16 Que tags supported)
N N Deferred Error Handling
N Y Parameter Rounding
N N Reporting actual retry count in Extended Sense bytes
15, 16 and 17.
Y Y Adaptive Caching (available only on some drives)
Y Y SMP = 1 in Mode Select command needed to save
RPL and Rotational Offset bytes (in Table 5.2.1-25
of Vol. II).
SCSI-1 SCSI-2 Status Supported
Y Y Good
Y Y Check Condition
Y Y Condition Met/Good
Y Y Busy
Y Y Intermediate/Good
Y Y Intermediate/Condition Met/Good
Y Y Reservation Conflict
Y Y Queue Full
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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 exchange of messages during the
Message Phase of operation. See the section on message protocol in the SCSI Interface manual.*
T able 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
112 450
125 500
137 550
150 600
162 650
175 700
187 750
200 800
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11.5.2 REQ/ACK offset
The maximum REQ/ACK offset supported by the ST11200 family is 15 (0Fh).
__________
*SCSI Interface Product Manual, P/N 77738479
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11.6 Physical interface
Figure 11.6-1a shows the locations of the physical interf ace components for the "N" and "ND" model drives.
Shown are the locations of the D .C. pow er connector, the SCSI interf ace connector, the I/O line terminators,
and the drive select and option select header.
Optional versions of this drive, the models ST11200NC and ST1980NC ha v e an 80 pin connector that has
the SCSI I/O signals, DC power and some option select functions all together in the 80 pin connector. See
Figure 11.6.3-1b and Table 11.6.3-1c.
Details of the physical, electrical and logical characteristics are given in paragraphs following, while the
SCSI operational aspects of Seagate drive interfaces are given in the Seagate SCSI Interface Product
Manual, P/N 77738479.
SCSI I/O
Connector
Pin 1 End
Pin 1
J1
J5
Pin 1
J4
Pin
1
2
3
4
J1
DC Power
Connector
Power
+12V
+12V ret
+ 5V ret
+ 5V
4321
I/O Terminators
J2
J6
Figure 11.6-1a. "N" and "ND" drives model physical interface (50 pin SCSI I/O connector)
I/O Terminators
80 Pin
J2
SCSI I/O and
DC Power
Connector
Pin 1
Pin 1 End
J4
J6
Figure 11.6-1b. "NC" model drive physical interface (80 pin I/O and DC power connector)
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11.6.1 DC cable and connector
The drive receives 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 equiv alent parts may be
used (see T ab le 11.6-1).
Table 11.6.1-1. Mating connector parts
Type of cable 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.
11.6.2.1 Physical description
The drive may be daisychained together or with other compatible SCSI devices using a common cable.
Both ends of the cable must be terminated. The drive implements single ended drivers and receivers that
allow a maximum cable length of six metres (19.6 f eet) (primarily for connection within a cabinet). All signals
are common between all SCSI devices. The drive may be daisychained only with SCSI devices having the
same type drivers and receivers. Devices having single ended interface circuits cannot be on the same
daisychain with devices having differential interface circuit. A maximum of 8 SCSI devices (including the
Host) may be daisychained together . The SCSI De vices at both ends of the daisychain are to be terminated.
Intermediate SCSI devices shall not be terminated (see Figure 11.6.3-2). Remove the terminator resistor
packs, not the terminator power source selector jumper (Figure 10.1-1).
11.6.2.2 Cable requirements
11.6.2.2.1 Single ended I/O circuits
The maximum total cable length for use with drives having single ended I/O driver and receiver circuits shall
be 6 metres (19.7 ft.) when operating at line data transfer rates of 5 Mbytes/sec or less, and 3 metres (9.85
ft.) when operating at transfer rates greater 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 cab le pin assignments are shown in T ab le 11.6.3-1a and 11.6.3-1c.
11.6.2.2.2 Differential I/O circuits
The maximum total cable length for use with drives ha ving 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
11.6.3-1a and 11.6.3-1c.
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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 available; however, impedance’s that are somewhat lower are satisfactory. A characteristic impedance of 100
ohm +10% is recommended for unshielded flat or twisted pair ribbon cab le. Howe ver , most a vailable cab les
have a some what lower characteristic impedance. To minimize discontinuities and signal reflections, cables
of different impedance’s should not be used in the same bus. Implementations may require tradeoffs 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 transfer rates.
Cable for "N" and "ND" models
Only nonshielded cable connectors are applicable. A 50 conductor flat cable or 25 twisted pair cab le 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.
57
Cables for "NC" drive models
The 80 pin connector option is intended for use on drives that plug directly into a wall/bracket mounted
connector in the host equipment Cable mounted connectors would not be used in such a case.
For installations requiring an 80 conductor cable connected I/O, only non-shielded connectors are applicable. Two 40 conductor cables or two 20 twisted pair cables are suggested. A minimum conductor size of
30 AWG should be used, with conductors on 50 mil (1.27 mm) centers.
Suggested nonshielded flat cable part numbers are:
Flat cable: 35M-336540 twisted pair: Spectr a Twist in flat 455-248-40
Equivalent parts may be used.
11.6.3 Connector requirements
11.6.3.1 Mating connectors for "N" and "ND" drive models
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 Key
(for cable ends)* 3M-3425-7050 With Strain Relief, No Center Key
Dupont-66900-290 With Strain Relief, With Center Key
Open end 3M-3425-6000 W/O Strain Relief, No Center Key
(In Daisychain) 3M-3425-6050 With Strain Relief, No Center Key
Dupont-66900-250 With Strain Relief, With Center Key
*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 keyed (see Figure 11.6.3-1).
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11.6.3.2 Mating connectorsfor "NC" models
The non-shielded connector shall be an 80 conductor connector consisting of two rows of 40 contacts
with adjacent contacts 50 mils (1.27 mm) apart. The connector is keyed by its shape. The characteristics
of the drive's PCB mounted connector are shown in Figure 11.6.3-1b.
Recommended mating flat cable connector part numbers are:
Seagate P/N: 77678558
Amp P/N: 557089-7
Recommended PCB or bulkhead mounted connectors are:
Straight-in connector (most commonly used):
Seagate P/N: 77678703
Amp US P/N: 2-557103-1
Amp Japan P/N: 5-175475-9
Right Angle to PCB connector:
Seagate P/N: 77678559
Amp US P/N: 2-557101-1
Amp Japan P/N: 5-175474-9
.370 ± .010
(9.398)
C
L
.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
(15.24)
4
.834 ± .010
(21.18)
.60
3
12
.20
typ
(5.08)
.065
x 45° chamfer typ
(1.65)
(6.60)
.335 ± .010
.040
(1.02)
.26
typ
(8.50)
+.001
–.002
dia
.083
(2.1)
Trifurcated Pins
(4 places)
ref
No. Pos.
50
"A"
3.767
(95.68)
"B"
3.697
(93.90)
"C"
2.720
(69.09)
"D"
2.400
(60.96)
Figure 11.6.3-1. A Non shielded, 50 pin SCSI device connector and 4 pin DC power drive PCB connector
Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
59
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57.87
0
(2.278)
–0.15
+ .000
[
0.15
–Y–
Pin 1*
62.15
(2.447)
0.15
– .006
MYM
± 0.15
(± .005)
MYM
[
Front
View
Contact
0.50
(.020)
0.3
(.012)
MYM
Pin 1
Housing
1.27
(.05)
Typ
X
X
C
of Datum Y
L
*Contacts are recessed along the center strip.
Top
View
Back
View
Fiigure 11.6.3-1b. Non-shielded 80 pin I/O and DC power connector. Used on "NC" models.
60
Product Manual - Hawk 1 F amily SCSI-2 (Volume 1), Rev. D
______________________________________________________________________________________
T
*
Disc Drive or
Other SCSI
Device
SCSI Device
Host Adapter/Initiator
SCSI Devices
Disc Drive or
Other SCSI
Device
* * *
1 thru 8
** ** *
T
Disc Drive or
Other SCSI
Device
View B
T indicates termination required
* T otal interface cab le length must not exceed that specified in paragr aph 11.6.2.2. (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 daisychain. Another device can be on the end with the terminator.
The host 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 -ACK 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.
Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
61
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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 for detailed electrical characteristics of these diff erential signals .
62
Product Manual - Hawk 1 F amily SCSI-2 (Volume 1), Rev. D
______________________________________________________________________________________
Table 11.6.3-1c. Single ended 80 pin cable pin assignments (Non-shielded connector)
Signal Pin number Signal Pin number
+12 V 1 Ground 41
+12 V 2 Ground 42
+12 V 3 Ground 43
+12 V 4 Ground 44
NC 5 NC 45
NC 6 NC 46
NC 7 Ground 47
NC 8 Ground 48
NC 9 Ground 49
NC 10 Ground 50
-IO 11 Ground 51
-REQ 12 Ground 52
-CO 13 Ground 53
-SEL 14 Ground 54
-MSG 15 Ground 55
-RST 1 6 Ground 56
-ACK 17 Ground 57
-BSY 18 Ground 58
-A TN 19 Ground 59
-DBP 20 Ground 60
-DB7 21 Ground 61
-DB6 22 Ground 62
-DB5 23 Ground 63
-DB4 24 Ground 64
-DB3 25 Ground 65
-DB2 26 Ground 66
-DB1 27 Ground 67
-DB0 28 Ground 68
NC 29 Ground 69
NC 30 Ground 70
NC 31 Ground 71
NC 32 Ground 72
NC 33 Ground 73
+5 V 34 Ground 74
+5 V 35 Ground 75
+5 V 36 Ground 76
SYNC [1] 37 LEDC [2] 77
MTRON [3] 38 DLYDST [4] 78
SCSIA0 [5] 39 SCSIA1 [5] 79
SCSIA2 [5] 40 SCSIA3 [5] 80
Notes.
Signals [1] thru [5] are used in place of installing jumpers and cables on option select connectors J2, J5 and
J6. See also notes following Figure 10.1-1.
[1] Synchronous spindle synchronizing signal, generated by either host or drive.
[2] Front panel LED signal; indicates drive activity for host front panel hard drive activity indicator.
[3] Asserted by host to enable Motor Start option (starts motor via SCSI bus command).
[4] Asserted by host to enable Delayed Motor Starrt option (motor starts at power on or after a delay of 12
seconds times drive ID). This and [3] above are mutually exclusive options.
[5] Binnary code on A3, A2, A1 and A0 asserted by host to set-up SCSI bus ID in driv e.
Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
63
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11.6.4 Electrical description
Model ST11200N/NC uses single ended interface signals. These signals must be terminated with 110 ohm
active termination circuits at each end of the total cable. Single Ended circuits use open collector or three
state drivers. See Figure 11.6.4-1 and 11.6-1.
The model ST11200ND uses differential interface signals and each of these must 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 drivers. See Figure 11.6.4-2 for circuit dr awing. Differential
I/O drives are shipped without terminators. These drives have no provisions for adding terminator sockets
on the PCB. On these drives some method of external termination must be provided by the user.
11.6.4.1 Single ended drivers/receivers
T ypical single ended driver and receiv er circuits for the ST11200N/NC is shown in Figure 11.6.4-1. Terminator circuits shown (Note [1]) are needed only when the disc drive is first or last in the daisychain.
Note. ALL TERMINATORS MUST BE ANSI SCSI-2 ALTERNATIVE 2 ACTIVE TERMINATORS.
T ransmitter characteristics
Single ended drives use an ANSI SCSI compatible open collector single ended driver . This driver is capable
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.
Line Driver
Transmitter
(or transceiver)
[2]
[4]
+2.85V
Flat
110
Ohm
Cable
Pair
[5]
[3]
[1]
Line Receiver
[4]
+2.85V
110
[1]
Ohm
Receiver
[2]
[1] Part of active terminator circuits. Removable terminator resistor packs, used in the drive when it is first
or last in the daisychain.
The difference in the voltages between input and outgput signals is due to the losses in the cab le .
[2] ANSI SCSI compatible circuits
[3] Total interface cable length should not exceed that specified in par agr aph 11.6.2.2.1.
[4] Source of drive terminator power is a semiconductor voltage regulating device which has an input
source voltage selected by jumper plug.
[5] Interface signals levels 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: >0.0V <0.8 V: >0.0 V
The difference in the voltages betw een input and output signals is due to the losses in the cable.
Figure 11.6.4-1. Single ended transmitters and receivers
64
______________________________________________________________________________________
11.6.4.2 Differential drivers/receivers
T ypical diff erential driver and receiver circuits used by the model ST11200ND are sho wn in Figure 11.6.4-2.
The drive has no provisions for terminator circuits on diff erential I/O drives.
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 or systems integrator must provide some external means of termination.
Output characteristics
Each signal driven by differential interf ace drives shall hav e the following output char acteristics when measured at the disc drive SCSI connector:
Low-level output voltage* = 2.0 V maximum at Low-level output current = 55 milliamps.
High-level output voltage* = 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 v oltages shall be measured between the output terminal and the SCSI device’s logic ground reference.
Product Manual - Hawk 1 F amily SCSI-2 (Volume 1), Rev. D
The output characteristics shall additionally conform to EIA RS-485-1983.
Input characteristics
Each signal received by differential interface drives shall have 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 drivers).
This requirement shall be met with the input voltage varying between -7 V dc and +12 V dc, with power on
or off, and with the hysteresis equaling 35 mv, minimum.
The input characteristics shall additionally conform to EIA RS-485-1983.
Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
65
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+5V
5.6K
Transmit/Receive
Enable (1)
DIFFSENS (6) Disable
Transmit or
Receive
Signal (2)
SCSI Device at Beginning of I/O Cable
(usually Host Adaptor/Initiator)
+5V
TE
LSI
XCVR
RE
R2
Term
(5)
Power
330
(4)
Ohm
Twisted or Flat
(3)
1
1
+5V
Transmit/Receive
Enable (1)
DIFFSENS (6)
Transmit or
Receive
Signal (2)
5.6K
150
Ohm
330
Ohm
(7)
+5V
TE
LSI
XCVR
RE
Disable
R2
1
1
Cable Pair
Term
Power
330
Ohm
150
Ohm
330
Ohm
(5)
(4)
SCSI Device at End of I/O Cable
(Drive/Target)
(7)
Notes.
[1] Positive Logic Enables Transmitter (+5 V = Asserted)
Negative Logic Enables Receivers (0 V = Asserted)
[2] Negative Logic Signal (0 V = Asserted)
[3] Total interface cable length should not exceed value giv en in parag raph 11.6.2.2 from first SCSI device
at beginning to end of daisychain. See section 11.6.4.2 f or signal characteristics.
[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 or systems integrator where needed. 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 a vailable on SCSI b us pin 26 for pow ering external termina-
tors if the drive option select header jumper (Figure 10.1-1a) is installed in position 8.
[6] SCSI I/O line (pin 21) disables I/O circuits if single-ended cable plugged in or cable 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 terminators
66
______________________________________________________________________________________
11.6.4.3 Terminator requirements
Internal disc drive I/O termination (provided only in single ended I/O drives) consists of active circuits with
resistor modules that plug into sockets on the Main PCB (see Figure 11.6-1). The disc drive models that
offer internal terminator sockets may be ordered with or without the resistor modules to f acilitate a particular
application. All single initiator/single target (nondaisychain) applications require that the Initiator and disc
drive be terminated. Daisychain applications require that only the units at each end of the daisychain be
terminated. All other peripherals on the chain should not be terminated. (See Figure 11.6.2-1).
Note. Remove terminator resistor modules where terminators are not required. Removal of terminator
power source selection jumper (see Figure 10.1-1) does not disconnect the terminator resistors
from the circuit.
Product Manual - Hawk 1 F amily SCSI-2 (Volume 1), Rev. D
For the Single-ended I/O ST11200N/NC applications, the SCSI b us
ANSI SCSI-2 Standard’s Alternative 2 termination (active termination), especially if the bus will be operated
at FAST SCSI transfer rates. The ST11200N/NC provides active termination as the on-board termination
option.
Note. ALL TERMINATORS USED IN THE DAISYCHAIN ABSOLUTELY MUST BE ACTIVE TERMINA-
TORS AS DESCRIBED ABO VE.
Differential I/O ST11200ND does not have provisions to add terminator sockets on the PCB. The user or
systems integrator must provide a terminator arrangement external to the drive.
11.6.4.4 Terminator power
The drive may be configured to accept terminator power via pin 26 of the SCSI Bus, to supply power to the
SCSI bus or to provide terminator power for optional internal termination resistors via the drive power
connector. See Figure 11.6-1 and 10.1-1. The drive can provide power both to its o wn terminators and to the
SCSI Bus terminator power line (Pin 26).
SCSI devices providing terminator power (TERMPWR)* shall have the following 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.
MUST
be terminated at both ends with
Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
67
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11.7 Disc drive SCSI timing
Table 11.7-1. Disc drive SCSI timing
Waveform Waveform
Description Symbol [1] Table [1] Typical Max
Target Select Time (no Arbitration) T00 N/A <1 us <250 us
Target Select Time (with Arbitration) T01 4.5-1,2 2.34 us 2.44 us
Target Select to Command T02 4.5-1 3.82 us 3.84 us
Target Select to MSG Out T03 4.5-2 1.62 us 1.66 us
Identify MSG to Command T04 4.5-3 3.56 us 3.64 us
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 us 0.78 us
Disconnect to Arbitration (for Reselect) T1 1 4.5-6 Command Dependent
This measures disconnected CMD overhead.
Target win Arbitration(for Reselect) T12 4.5-7 3.0 us
Arbitration to Reselect T13 4.5-7 1.82 us
Reselect to Identify MSG In T14 4.5-7 1.52 us
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 1.04 us
Command Complete MSG to Bus Free T19 4.5-5,8,15 0.80 us
Data to Save Data Pointer MSG T20 4.5-14 5.00 us
Save Data Pointer MSG to Disconnect
MSG T21 4.5-14 0.85 us
Command Byte Transfer T22 4.5-4 0.06 us
Next Command Byte Access 4.5-4
Next CDB Byte Access (Byte 2 of 6) T23.6.2 4.5-4 0.54 us 0.64 us
Next CDB Byte Access (Byte 3 of 6) T23.6.3 4.5-4 0.11 us 0.14 us
Next CDB Byte Access (Byte 4 of 6) T23.6.4 4.5-4 0.12 us 0.14 us
Next CDB Byte Access (Byte 5 of 6) T23.6.5 4.5-4 0.13 us 0.14 us
Next CDB Byte Access (Byte 6 of 6) T23.6.6 4.5-4 0.11 us 0.14 us
68
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Product Manual - Hawk 1 F amily SCSI-2 (Volume 1), Rev. D
continued from previous page
Waveform Waveform
Description Symbol [1] Table [1] Typical Max.
Asynchronous Data Transfer Characteristics: (continued)
Next CDB Byte Access (Byte 2 of 10) T23.10.2 4.5-4 0.46 us 0.50 us
Next CDB Byte Access (Byte 3 of 10) T23.10.3 4.5-4 0.11 us 0.14 us
Next CDB Byte Access (Byte 4 of 10) T23.10.4 4.5-4 0.12 us 0.14 us
Next CDB Byte Access (Byte 5 of 10) T23.10.5 4.5-4 0.12 us 0.14 us
Next CDB Byte Access (Byte 6 of 10) T23.10.6 4.5-4 0.11 us 0.14 us
Next CDB Byte Access (Byte 7 of 10) T23.10.7 4.5-4 0.12 us 0.14 us
Next CDB Byte Access (Byte 8 of 10) T23.10.8 4.5-4 0.11 us 0.12 us
Next CDB Byte Access (Byte 9 of 10) T23.10.9 4.5-4 0.13 us 0.14 us
Next CDB Byte Access (Byte 10 of 10) T23.10.10 4.5-4 0.12 us 0.16 us
Data In Byte Transfer (parameter) T24 4.5-12 0.06 us
Data Out Byte Transfer (parameter) T25 4.5-13 0.06 us
Next Data In Byte Access (parameter) T26 4.5-12 0.10 us 0.12 us
Next Data Out Byte Access (parameter) T27 4.5-13 0.11 us 0.14 us
Data In Byte Transfer (media) [2] T28 4.5-12 0.04 us 0.06 us
Data Out Byte Transfer (media) [2] T29 4.5-13 0.04 us 0.06 us
Next Data In Byte access (media [2] T30 4.5-12 0.10 us 0.14 us
Next Data Out Byte access (media [2] T31 4.5-13 0.10 us 0.14 us
MSG IN Byte Transfer T32 4.5-5,7 0.06 us
4.5-8,14,15
MSG OUT Byte Transfer T33 4.5-2 0.06 us
STATUS Byte Transfer T34 4.5-5,8 0.06 us
4.5-15
Synchronous Data Transfer Characteristics:
Request Signal Transfer Per iod [3] - - various 800 ns
Notes.
[1] See SCSI-2 Interface Manual P/N 77738479 (called Volume II), section 4.5
[2] Maximum SCSI asynchronous interface transfer rate is given in section 5.3.
[3] Synchronous Transf er 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 SCSI2 Interface Product Manual (P/N 77738479) for a description of synchronous data transfer operation.
General timing diagrams for SCSI interface operation are shown in the SCSI-2 Interface Product Manual
P/N 77738479, Section 4.5. The specific timing values that apply to this drive are listed in Table 11.7-1.
Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
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69
12.0 Options
All options are incorporated or packaged at the manufacturing facility.
12.1 Front panel
The normal front panel available is black 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 Drive termination
This option may be incorporated during manufacture at the request of the customer. For single ended
interface drives, termination consists of 110 ohm resistor modules (SIP’s) which are installed on the Main
PCB via sockets (See Figure 11.6-1).
70
______________________________________________________________________________________
Product Manual - Hawk 1 F amily SCSI-2 (Volume 1), Rev. D
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 Installation manual
This manual (P/N 77738480) 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
familiar with the product. It also includes basic information to assist in obtaining service for the drive.
Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
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71
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 T echnical Support
is available for all Seagate products by calling the SeaFAX, SeaFone, SeaTDD or SeaBOARD services.
These are toll calls.
SeaF AX: United States 408/438-2620 England 44-62-847-7080
You can use a Touch-Tone telephone to access Seagate’s automated FAX delivery 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 Friday. Recordings are accessible 24 hours a day, 7 days a week.
SeaTDD: 408/438-5382
TDD is a Telecommunication Device f or the Deaf where two people can communicate using a ke yboard that
is connected to the phone line. A TDD device is required to access this service. This service is available
from 8:00 AM to 5:00 PM PST, Monday through Friday.
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. (300–9600 baud, 8-N-1). This is a toll call.
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
72
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Listed below are some of the SEAGATE Peripheral family members. For specific information on each member,
refer to the appropriate documents.
Model Model Product Unformatted
Name Number Manual Interface Capacity (MB)
ST3600 ST3500N 77738477(I) SCSI-2 502
ST3600N 77738477(I) SCSI-2 617
ST3610N/ND/NC 77738495(I) SCSI-2 635*
ST3600A 77738485 AT (IDE) 617
ST11200 ST11200N/ND/NC 77738476(I) SCSI-2 1248*
ST1980N/ND/NC 77738476(I) SCSI-2 1021*
ST1950N 77738476(I) SCSI-2 953
ST1830N 77738476(I) SCSI-2 834
ST12400 ST12400N/ND/NC 77767450(I) SCSI-2 2537*
ST11900N/ND/NC 77767450(I) SCSI-2 2003*
ST12400 Wide ST12400W/WD/WC 77767457(I) SCSI-2 2537*
Product Manual - Hawk 1 F amily SCSI-2 (Volume 1), Rev. D
Seagate Peripheral Family
KIOWA Family
HAWK 1 Family
HAWK 2 Family
HAWK 1LP Family
ST31200 ST31200N/ND/NC 77767452(I) SCSI-2 1258.8*
ST3620N/NC 77767452(I) SCSI-2 651.8*
ST31200 Wide ST31200W/WD/WC 77767461(I) SCSI-2 1258.8*
ST3620W 77767461(I) SCSI-2
HAWK 2LP Family
ST32430 ST32430N/ND/NC 77767471(I) SCSI-2 2140*
ST31230N/ND/NC 77767471(I) SCSI-2 1050*
ST32430 Wide ST32430W/WD/WC 77767480(I) SCSI-2
ST31230W/WD/WC 77767480(I) SCSI-2
HAWK 4 Family
ST15230 ST15230N/ND/NC 77767472(I) SCSI-2 4294*
ST15230 Wide ST15230W/WD/WC 77767479(I) SCSI-2
SCSI INTERFACE
SCSI Interface Manual, Vol. 2 77765466 (II)** SCSI-2 N/A**
SCSI Interface Manual; Vol. 2; Ver. 2 77738479 (II)** SCSI-2/SCSI-3 N/A**
* Product Manual covers both Single-Ended and Differential Interfaces.
**Interface Manual for several different Product Manuals (Volume 2 of 2 Volume set).
Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
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73
continued from previous page
Model Model Product Unformatted
Name Number Manual Interface Capacity
WREN 3 ST4182E 77738212 ESDI 101, 141 or 182
Family ST4182N 77738270 SCSI 101, 141 or 182
WREN 3 HH ST2106N 77765250 SCSI 106 (1024 Byte)
Family ST2106E 77765276 ESDI 106
WREN 4 ST4350N 77738386 SCSI 350
Family ST4376N 77765338 SCSI 376
ST4376ND 77765361 SCSI 376 (Dif. I/O only)
WREN 5 ST4442E 77765300 ESDI 442 (15 Hd, 1412 Cyl)
Family ST4383E 77765300 ESDI 383 (13 Hd, 1412 CYL)
ST4384E 77765300 ESDI 383 (15 Hd, 1224 Cyl)
ST4702N 77765336 SCSI 702
ST4385ND/702ND 77765366 SCSI 385, 702 (Dif. I/O)
ST4385N 77765378 SCSI 385 (15 Hd, 791 Cyl)
WREN 5 HH ST2125N/209N 77765297 SCSI 125, 209
Family
WREN 6 ST4766N/ND 77765353 SCSI 766 (Dif. I/O)*
Family ST4766E 77765358 ESDI 766, 383
WREN 6 HH ST2383N/502N 77765414 SCSI-1 383, 502
Family ST2274A/383A 77765393 AT (IDE) 274, 383
ST2182E/383E 77765369 ESDI 182, 383
WREN 7 ST41200N/ND 77765417 SCSI 1200*
ST41200N/ND 77765374 SCSI-2 1200*
WREN 8 ST41650N 77765470 (I) SCSI-2 1650*
Family ST41651N/ND 77738474 (I) F AST SCSI-2 1650*
WREN 9 ST42100N 77738475 (I) FAST SCSI-2 2200
Family
WRENRNR-2 ST4767N 77765445 (I) SCSI-2 767 (F ast Access)
Family ST4767E/769E 77765457 ESDI 767
* Product Manual covers both Singe-Ended and Differential Interfaces.
Product Manual - Hawk 1 F amily SCSI-2 (Volume 1), Rev. D
______________________________________________________________________________________
Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
_____________________________________________________________________________________
Product Manual - Hawk 1 F amily SCSI-2 (Volume 1), Rev. D
______________________________________________________________________________________
Sea gate Technology, Inc.
920 Disc Drive, Scotts Valley, California 95066-4544, USA
Publication Number: 77738476, Rev . D (6/94) Printed in USA
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