Seagate Elite 9 User manual

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Elite 9 Disc Drive
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ST410800N/ND
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ST410800W/WD
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Product Manual, Volume 1
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Elite 9 Disc Drive
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ST410800N/ND
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ST410800W/WD
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Product Manual, Volume 1
○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○

© 1994 Seagate Technology, Inc. All rights reserved
Publication number: 83328860, Rev. C
September 1994
Seagate®, Seagate Technology®, and the Seagate logo are registered
trademarks of Seagate Technology, Inc. Elite™, SeaFAX™, SeaFONE™,
SeaTDD™,andSeaBOARD™aretrademarksofSeagateTechnology,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 from Seagate Technology, Inc.

Note. ProductManual 83328860 is Volume 1 of a two-volume
documentwiththeSCSIinterfaceinformationinthe Volume2
SCSI-2 Interface Product Manual, Part Number 77738479.
Revision status summary sheet
Sheets
Revision Date Writer/Engineer affected
A (preliminary-01) 10/30/93 L. Newman/L. Clausen All
A12/10/93 L. Newman/L. Clausen All
B05/18/94 L. Newman/L. Clausen All
C (preliminary-01) 07/21/94 L. Newman/L. Clausen All
C09/23/94 L. Newman/L. Clausen 26, 41

Contents
1.0 Scope ................................................................................................................................. 1
2.0 Applicable standard and reference documentation ....................................................... 3
2.1 Standards ..................................................................................................................... 3
2.2 Applicable reference documents................................................................................... 3
3.0 General description........................................................................................................... 5
4.0 Standard features.............................................................................................................. 7
4.1 Performance ................................................................................................................. 8
4.1.1 Reliability............................................................................................................. 8
4.2 Unformatted and formatted capacities .......................................................................... 8
4.3 Options ......................................................................................................................... 8
4.4 Installation..................................................................................................................... 9
5.0 Performance-related characteristics and features ......................................................... 11
5.1 Internal drive characteristics ......................................................................................... 11
5.2 SCSI seek performance characteristics ........................................................................ 11
5.2.1 Seek time ............................................................................................................ 12
5.2.2 Format drive command execution time................................................................ 12
5.3 General performance characteristics ............................................................................ 13
5.4 Start/stop time............................................................................................................... 13
5.5 Prefetch/multi-segmented cache control ....................................................................... 14
5.5.1 Adaptive read lookahead..................................................................................... 15
5.6 Caching write data ........................................................................................................ 15
5.7 Synchronized spindle operation .................................................................................... 16
6.0 Reliabilityspecifications................................................................................................... 19
6.1 Error rates..................................................................................................................... 19
6.1.1 Environmentalinterference.................................................................................. 19
6.1.2 Write errors ......................................................................................................... 19
6.1.3 Seek errors ......................................................................................................... 20
6.2 Reliability and service ................................................................................................... 20
6.2.1 Mean time between failures (MTBF).................................................................... 20
6.2.2 Air flow ................................................................................................................ 20
6.2.3 Preventivemaintenance...................................................................................... 23
6.2.4 Service life........................................................................................................... 23
6.2.5 Service philosophy.............................................................................................. 23
6.2.6 Installation ........................................................................................................... 23
6.2.7 Service tools........................................................................................................ 23

7.0 Physical and electrical specifications............................................................................ 25
7.1 AC power requirements ............................................................................................ 25
7.2 DC power requirements ............................................................................................ 25
7.2.1 Conducted noise immunity ............................................................................ 27
7.2.2 Power sequencing......................................................................................... 27
7.2.3 +12V current profile ....................................................................................... 28
7.3 Heat/powerdissipation.............................................................................................. 28
7.4 Environmentallimits.................................................................................................. 29
7.4.1 Temperature.................................................................................................. 29
7.4.2 Relative humidity ........................................................................................... 29
7.4.3 Effective altitude (sea level)........................................................................... 29
7.4.4 Shock and vibration ....................................................................................... 29
7.4.5 Air cleanliness ............................................................................................... 31
7.4.6 Acoustics....................................................................................................... 31
7.5 Electromagneticcompatibility.................................................................................... 31
7.6 Mechanical specifications ......................................................................................... 32
7.6.1 Drive orientation ............................................................................................ 33
7.6.2 Cooling .......................................................................................................... 33
8.0 Mediacharacteristics ...................................................................................................... 35
8.1 Media description...................................................................................................... 35
9.0 Defect and error management ........................................................................................ 37
9.1 Defects and errors .................................................................................................... 37
10.0 Option headers ................................................................................................................ 39
10.1 ST410800 option headers......................................................................................... 39
10.2 Synchronized spindles interface ............................................................................... 42
10.2.1 Electrical description...................................................................................... 42
10.3 Grounding................................................................................................................. 43
11.0 Interface requirements .................................................................................................... 45
11.1 General description................................................................................................... 45
11.2 SCSI interface messages supported......................................................................... 45
11.3 SCSI interface commands supported........................................................................ 46
11.3.1 Inquiry data.................................................................................................... 48
11.3.2 Mode sense data ........................................................................................... 49
11.4 SCSI bus conditions and miscellaneous features supported..................................... 51
11.5 Synchronous data transfer........................................................................................ 52
11.5.1 Synchronous data transfer periods supported .............................................. 52
11.5.2 REQ/ACK offset............................................................................................ 52
11.6 DC cable and connector ........................................................................................... 52
vi Elite 9 Product Manual, Rev. C

11.7 SCSI physical interface............................................................................................. 53
11.7.1 Physical characteristics ................................................................................ 54
11.7.2 Connectorrequirements ............................................................................... 55
11.7.3 Electrical description ..................................................................................... 55
11.8 SCSI physical interface............................................................................................. 59
11.8.1 Non-wide SCSI interface............................................................................... 59
11.8.2 Wide SCSI interface...................................................................................... 62
11.9 Disc drive SCSI timing .............................................................................................. 65
Index.......................................................................................................................................... 67
Figures
Figure 1. Elite 9 family disc drive .............................................................................................. 1
Figure 2. Elite 9 disc drive (exploded view)............................................................................... 5
Figure 3. OEM interruptible thermal calibration implementation ................................................ 12
Figure 4. Synchronized drive interconnect diagram .................................................................. 16
Figure 5. Synchronized reference signal characteristics........................................................... 17
Figure 6. Air-flow patterns......................................................................................................... 21
Figure 7. R/T/U/CYHX temperature measurement locations .................................................... 22
Figure 8. Elite 9 drive typical +12V current profile..................................................................... 28
Figure 9. Elite 9 drive typical mounting configuration dimensions ............................................. 32
Figure 10. Elite 9 drive recommended mounting......................................................................... 33
Figure 11. ST410800 option header locations ............................................................................ 39
Figure 12. Option select jumper connectors ............................................................................... 40
Figure 13. SCSI reference index signal driver/receiver combination........................................... 42
Figure 14. ST410800 configuration select header specification.................................................. 43
Figure 15. ST410800N/ND physical interface............................................................................. 53
Figure 16. ST410800W/WD physical interface ........................................................................... 53
Figure 17. Single-ended transmitters and receivers.................................................................... 56
Figure 18. Typical differential I/O line transmitter/receiver and terminators................................. 57
Figure 19. Terminating resistor locations for ND and WD drives ................................................ 58
Figure 20. Non-shielded non-wide SCSI device connector ......................................................... 59
Figure 21. Non-shielded wide SCSI device connector ................................................................ 62
Tables
Table 1. DC power requirements for ST410800N/ND drives ................................................... 25
Table 2. DC power requirements for ST410800W/WD drives.................................................. 26
Elite 9 Product Manual, Rev. C vii

Table 3. SCSI messages supported ........................................................................................ 45
Table 4. Supported commands............................................................................................... 46
Table 5. Elite 9 family drives inquiry data................................................................................. 48
Table 6. Mode sense data, Elite 9 default values (SCSI-1 implementation)............................. 49
Table 7. Mode sense data, Elite 9 default values (SCSI-2 implementation)............................. 50
Table 8. SCSI bus conditions and other miscellaneous features ............................................. 51
Table 9. Synchronous data transfer periods ............................................................................ 52
Table 10. Single-ended cable pin assignments ......................................................................... 60
Table 11. Differential cable pin assignments ............................................................................. 61
Table 12. Single-ended P cable pin assignments ...................................................................... 63
Table 13. Differential P cable pin assignments .......................................................................... 64
Table 14. Disc drive SCSI timing ............................................................................................... 65
viii Elite 9 Product Manual, Rev. C

Elite 9 Product Manual, Rev. C 1
Figure 1. Elite 9 family disc drive
1.0 Scope
This manualdescribes Seagate Technology®, Inc. Elite 9™ disc drives.
Elite 9 drives support 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 manual. The SCSI-2 Interface ProductManual
(partnumber77738479)describesgeneralSCSI interfacecharacteristics
of this and other families of Seagate drives

2Elite 9 Product Manual, Rev. C

Elite 9 Product Manual, Rev. C 3
2.0 Applicable standard and
reference documentation
Seagatetakesallreasonablestepstoensurethatitsproductsarecertifiable
to currently accepted standards. Typical applications of these disc drives
include customer packaging and subsystem design.
Safety agencies conditionally certify component parts, such as the Elite 9
disc drive, based on their final acceptability in the end-use product. The
subsystem designer is responsible for meeting these conditions of accept-
ability in obtaining safety/regulatory agency compliance in their end-use
product and certifying where required by law.
2.1 Standards
The Elite 9 disc drive is a UL recognized component per UL1950, CSA
certified to CSA C22.2 No. 950-M89, and VDE certified to VDE 0805 and
EN60950.
TheElite9 disc driveissupplied as acomponentpart. It istheresponsibility
ofthesubsystemdesignertomeetEMC/regulatoryrequirements.Engineer-
ing test characterizations of radiated emissions are available from the
Seagate safety department.
2.2 Applicable reference documents
Elite 9 Installation Guide
Seagate part number: 83328850
SCSI-2 Interface Product Manual (volume 2)
Seagate part number: 77738479
ANSI small computer system interface (SCSI) documents
ANSIX3.131-1986 (SCSI-1)
X3T9.2/86-109 Rev. 10H (SCSI-2)
X3T9.2/91-010 Rev. 10 (SCSI-3) Parallel Interface
Incaseofconflictbetweenthisdocumentandanyreferenceddocument,this
document takes precedence.

4Elite 9 Product Manual, Rev. C

Elite 9 Product Manual, Rev. C 5
Figure 2. Elite 9 disc drive (exploded view)
3.0 General description
Elite 9 drives are high capacity, high-performance, highly reliable random-
access storage devices designed to meet the needs of the original equip-
ment manufacturer (OEM) marketplace.
Elite9discdriveshaveanembeddedSCSIcontroller.Performanceinforma-
tion is provided in Section 5.
The Elite 9 drive’s interface supports multiple initiators, disconnect/recon-
nect,self-configuring host software, and automaticfeatures that relievethe
host from knowing the physical characteristics of the targets (logical block
addressing is used).
The head and disc assembly (HDA) is sealed at the factory. Air circulates
withintheHDAthroughanon-replaceablefiltertomaintainacontamination-
free HDA environment.
RefertoFigure2foranexplodedviewofthedrive.Thisexplodedviewisfor
informationonly—neverdisassembletheHDAanddonotattempttoservice
itemsinthesealedenclosure(heads, media, actuator,etc.)asthisrequires
specialfacilities.Thedrivecontainsnoreplaceableparts.OpeningtheHDA
voids your warranty.

6Elite 9 Product Manual, Rev. C
Elite 9 drives use a dedicated landing zone at the innermost radius of the
mediatoeliminatethepossibilityofdestroyingordegradingdatabylanding
inthedatazone.The drive automaticallygoestothe landing zonewhenthe
power is removed.
An automatic shipping lock prevents potential damage to the heads and
discs.Theshipping lockdisengageswhen poweris applied tothe drive and
the head load process begins.
Elite9drivesdecodetrack0locationdatafromthededicatedservosurface
to eliminate mechanical transducer adjustments and related reliability
concerns.
A high-performance actuator assembly with a low-inertia, balanced, pat-
ented, straight-arm design provides excellent performance with minimal
power dissipation.

Elite 9 Product Manual, Rev. C 7
4.0 Standard features
Elite 9 drives have the following standard features:
•Integrated SCSI controller
•Single-ended or differential SCSI drivers and receivers
•Non-shielded 50-pin connector
•Initiator/target terminator power option
•SCSI bus parity with full parity pass-through
•SCSI disconnect/reconnect support
•Multiple SCSI initiator support
•SCSI-2 command set support
•Synchronous SCSI bus data transfer protocol (maximum offset of 15)
•10.0 Mbytes/sec SCSI bus transfers (minimum period 100 nsec)
•20.0 Mbytes/sec SCSI bus wide transfers (ST410800W/WD models)
•954 Kbyte data buffer
•Cache buffer management
•User-selectable logical block size (180 to 4,096 bytes)
at even-number intervals
•ECC (error correction code) on the fly
•User-selectable automatic defect reallocation scheme
•User-selectable number of spare sectors per cylinder
•Industry standard 5.25-inch full-high form factor dimensions
(3.25 high ×5.75 wide ×8.00 deep)
•Microcode downloadable using the Write Data Buffer command
•Asynchronous and synchronous data-transfer protocols
•Firmware downloadable using a SCSI interface
•Programmable sector-reallocation scheme
•Flawed sector reallocation at format time
•Programmable auto-write and auto-read reallocation
•Reallocation of defects on command (Reassign Block command)
•96-bit and Reed-Solomon error correction code
•Sealed head and disc assembly (HDA)
•No preventive maintenance or adjustments required
•Dedicated head-landing zone
•Automatic shipping lock
•Automatic thermal compensation
•Embedded Grey Code track address to eliminate seek errors
•Self-diagnostics performed at power-on
•1:1 interleave
•Zone bit recording (ZBR)
•Vertical, horizontal, or top-down mounting
•Dynamic spindle brake
•Active internal termination (ST410800N/W models)

8Elite 9 Product Manual, Rev. C
4.1 Performance
•Programmable multi-segmentable cache buffer
•5,400 RPM spindle; average latency = 5.55 msec
•Command queuing of up to 64 commands
•Background processing of queue
•Supports start and stop commands
•Provides synchronized spindle capability
•Low audible noise for office environment
•Low power consumption
4.1.1 Reliability
•500,000 hour MTBF
•Adaptive seek velocity; improved seek performance
• LSI circuitry
•Balanced low-mass rotary voice-coil actuator
4.2 Unformatted and formatted capacities
Standard OEM models are formatted to have 512-byte sectors.
Elite 9 drives have one (1) spare cylinder per unit and 9 spare sectors per
cylinder. You may select the number of spare sectors per cylinder to meet
your specific needs.
Formatted Unformatted
9,090 Mbytes 10,800 Mbytes
Users having the necessary equipment may modify the data block size
before issuing aformat command to obtain different formatted capacities.
User-available capacity also depends on the spare reallocation scheme
selected.SeetheModeSelectcommand and the Format command inthe
SCSI-2 Interface Product Manual (part number 77738479).
4.3 Options
The following options are incorporated at the time of production or are
available separately. All kits may be installed in the field.
• Front panel
Thestandard frontpanel is black plastic; youmay order other colors. The
panel has a single rectangular green LED indicator lens that, when
glowing, indicates the drive is selected.
Front panel kit with green lens, part number 70553702
Front panel kit with red lens, part number 705537012
•Two pin shunt jumpers, 2 mm, part number 97630051
•External terminator, single-ended, shielded, part number 15387797
•External terminator, single-ended, unshielded, part number 15387807
•Internal terminator, differential, part number 15479501
•Single-unit shipping pack
The drive is shipped in bulk packaging to provide maximum protection
against transit damage. Units shipped individually require additional
protectionas provided by thesingle-unit shipping pack. Usersplanning
single-unit distribution should specify this option.

Elite 9 Product Manual, Rev. C 9
•Shielded SCSI I/O cable
1.5 foot cable, part number 47191159
5 foot cable, part number 47191151
15 foot cable, part number 47191152
20 foot cable, part number 47191153
40 foot cable, part number 47191164
80 foot cable, part number 47191154
• Elite 9 Installation Guide, part number 83328850
This manual provides basic installation information for persons not
familiarwiththeproduct.Italsoincludes informationonobtaining techni-
cal support and service for the drive.
4.4 Installation
ForoptionjumperlocationsanddefinitionsrefertoSection10.Drivedefault
mode parameters are not normally needed for installation. Refer to
Section 11.3.2 for default mode parameters if you need them.
•Ensure that the SCSI ID of the drive is not the same as the host adapter.
•Ifmultipledevicesareonthe bus,setthedrive’sSCSIIDtoonethatisnot
presently used by other devices on the bus.
• If the drive is the onlydevice on the bus, attach it to the end of theSCSI
bus cable. ST410800N and ST410800W drives have termination built in
(ensure that the internal terminator has not been disconnected—see
Section 10.1 for termination options). ST410800ND and ST410800WD
drives are terminated internally with terminators in the sockets provided
nextto the SCSI I/O connector. The terminatorpart numberis 15479501.
• If you attach the drive to a bus that contains other devices, and the new
drive is not attached to the end of the bus, remove termination from the
new drive. To remove (disconnect) termination from ST410800N and
ST410800W drives, remove the jumper from pins 19 and 20 of J4A(see
Figure12).To remove terminationfromST410800NDandST410800WD
drives, remove the terminators from the sockets located next to the SCSI
I/O connector (see Section 11.7.3.3).
• Set all appropriate option jumpers before applying power to the drive.If
you change jumpers after applying power, recycle the drive’s power to
makethe new settings effective.
Formatting
•Itisnot necessary tolow-levelformat this drive.The drive isshippedfrom
the factory low-level formatted in 512-byte sectors.
•Reformat the drive if:
a. You select a different sector size.
b. You select a different spare-sector allocation scheme.

10 Elite 9 Product Manual, Rev. C