. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Elite 23 Disc Drive. . . . . . . . . . . . . . . . .
Elite 23 Product Manual, Rev. A 11.0 ScopeThis manual describes Seagate Technology®, Inc. Elite 23™ disc drives.Elite 23 drives support the small comp
Elite 23 Product Manual, Rev. A 32.0 Applicable standards and reference documentationThe drive is a system peripheral developed to the highest standar
4 Elite 23 Product Manual, Rev. AAustralian C-TickIf this model has the C-Tick Marking it complies with the Australia/New Zealand Standard AS/NZS3548
Elite 23 Product Manual, Rev. A 53.0 General descriptionElite 23 drives combine magnetoresistive (MR) heads, partial response/maximum likelihood (PRML
6 Elite 23 Product Manual, Rev. AFigure 2. Elite 23 family drive3.1 Standard featuresElite 23 drives have the following standard features:• Integrated
Elite 23 Product Manual, Rev. A 7• Dynamic spindle brake• Active IC terminators enabled by jumper (“N” and “W” models only)• 2,000 Kbyte data buffer.
8 Elite 23 Product Manual, Rev. A3.7 Factory installed accessoriesThe Elite 23 Installation Guide, part number 83329130, is shipped with each standard
Elite 23 Product Manual, Rev. A 94.0 Performance characteristics4.1 Internal drive characteristics (transparent to user)[1] Rounded off values4.2 SCSI
10 Elite 23 Product Manual, Rev. ASynchronous transfer rate for fast SCSI-2:8 bit data bus models 1.25 to 10 Mbytes/sec16 bit data bus models 2.5 to 2
Elite 23 Product Manual, Rev. A 114.3 Start/stop timeDisabling the Motor Start option causes the drive to become ready within 45 seconds after DC powe
12 Elite 23 Product Manual, Rev. ACase B - Read command is received and the first logical block address requested is not in any segment of thecache.1.
Elite 23 Product Manual, Rev. A 13system performance. The max prefetch field (bytes 8 and 9) limits the amount of prefetch. The drive does notuse the
Elite 23 Product Manual, Rev. A 155.0 Reliability specificationsThe following reliability specifications assume correct host/drive operational interfa
16 Elite 23 Product Manual, Rev. A5.1.4 Seek errorsA seek error is defined as a failure of the drive to position the heads to the addressed track. The
Elite 23 Product Manual, Rev. A 175.2.6 S.M.A.R.T.S.M.A.R.T. is an acronym for Self-Monitoring Analysis and Reporting Technology. This technology is i
18 Elite 23 Product Manual, Rev. APredictive failuresS.M.A.R.T. signals predictive failures when the drive is performing unacceptably for a period of
Elite 23 Product Manual, Rev. A 196.0 Physical/electrical specificationsThis section provides information relating to the physical and electrical char
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Elite 23 Disc Drive. . . . . . . . . . . . . . . . .
20 Elite 23 Product Manual, Rev. A[9] Seeking is defined as a third-stroke seek at OD. A command is issued every 20 msec.[10] Read track is defined as
Elite 23 Product Manual, Rev. A 21Note. All times and currents are typical. See Table 2 for maximum current requirements.6.3 Power dissipationST423451
22 Elite 23 Product Manual, Rev. ATable 3: PCB and HDA temperaturesNote.[1] The air-flow pattern with which the temperature guidelines in Column 2 wer
Elite 23 Product Manual, Rev. A 23b. Non-operatingNon-operating temperature should remain between –40° to 158°F (–40° to 70°C) package ambient with am
24 Elite 23 Product Manual, Rev. AFigure 5. Recommended mountingPackage Size Packaged/Product Weight Drop Height<600 cu in (<9,800 cu cm) Any 60
Elite 23 Product Manual, Rev. A 256.4.4.2 Vibrationa. Operating—normalThe drive, as installed for normal operation, complies with the complete specifi
26 Elite 23 Product Manual, Rev. AFigure 6. Mounting configuration dimensions for “N” modelsLJKHGFAE[2]DBC[4][1][3]Inches Millimeters8.0005.7502.8752.
Elite 23 Product Manual, Rev. A 27Figure 7. Mounting configuration dimensions for “W” and “WD” modelsLJKHGFAE[2]DBC[4][1][3]Inches Millimeters8.0005.7
Elite 23 Product Manual, Rev. A 297.0 Defect and error managementThe drive, as delivered, complies with this product manual. The read error rate and s
© 1997 Seagate Technology, Inc. All rights reservedPublication number: 83329140, Rev. AAugust 1997Seagate, Seagate Technology, and the Seagate logo ar
30 Elite 23 Product Manual, Rev. A[1] Setting these retry counts to a value below the default setting could result in degradation of the unrecov-ered
Elite 23 Product Manual, Rev. A 318.0 InstallationThe first thing to do when installing a drive is to set the drive ID (select) on the SCSI bus and se
32 Elite 23 Product Manual, Rev. AFigure 8. ST423451N option select jumper connectorsImmediate spinup (if the Start Command option jumper is disconnec
Elite 23 Product Manual, Rev. A 33[1] J7 used on WD model onlyFigure 9a. ST423451W/WD option select jumper connectorsSCSI ID = 0 (default)J4ASCSI ID
34 Elite 23 Product Manual, Rev. AFigure 9b. ST423451 “WD” model auxillary remote cable ID selectSCSI ID = 0 (default)J7SCSI ID = 1SCSI ID = 2SCSI ID
Elite 23 Product Manual, Rev. A 35Figure 10a. J4A connections for Activity, Fault, and Ready LED indicators for all modelsFigure 10b. J7 auxiliary rem
36 Elite 23 Product Manual, Rev. A8.1.1 Notes for Figures 8 through 10bNotes explaining the functions of the various jumpers on jumper header connecto
Elite 23 Product Manual, Rev. A 378.2 Drive orientationThe balanced rotary arm actuator design of the drive allows it to be mounted in any orientation
38 Elite 23 Product Manual, Rev. A8.4 Drive mountingNo special drive mechanical mounting constraints are applicable to this drive.8.5 GroundingSignal
Elite 23 Product Manual, Rev. A 399.0 Interface requirementsThis section describes Elite 23 interface requirements.9.1 General descriptionThis section
Revision status summary sheetThis manual is volume 1 of a two-volume document with the SCSI interface information in the volume 2SCSI Interface Produc
40 Elite 23 Product Manual, Rev. A9.3 SCSI interface commands supportedTable 6 lists the SCSI interface commands that are supported in the SCSI-2 and
Elite 23 Product Manual, Rev. A 41Mode select (same pages as Mode Sense command, see below)15h Y [2] [3]Mode select (10) 55h YMode sense 1Ah Y [2] [3]
42 Elite 23 Product Manual, Rev. A[1] The drive can format to any even number of bytes per sector from 512 to 4,096.[2] Supports 6-byte and 10-byte ve
Elite 23 Product Manual, Rev. A 439.3.1 Inquiry dataTable 7 following lists the Standard Inquiry command data that the drive returns to the initiator
44 Elite 23 Product Manual, Rev. ASaved values are stored on the disk media using a Mode Select command. Only parameter values that areallowed to be c
Elite 23 Product Manual, Rev. A 45The following tables list the values of the data bytes returned by the drive in response to the Mode Sense com-mand
46 Elite 23 Product Manual, Rev. A[1] Though byte 12, bit 7 is shown as changeable, the FSW function governed by that bit is not implementedby this dr
Elite 23 Product Manual, Rev. A 479.4 SCSI bus conditions and miscellaneous features supportedAsynchronous SCSI bus conditions supported by the drive
48 Elite 23 Product Manual, Rev. A9.5 Synchronous data transferThe data transfer period to be used by the drive and the initiator is established by an
Elite 23 Product Manual, Rev. A 49Figure 12. Physical interface for “N” model drivesFigure 13. Physical interface for “W” and “WD” model drivesPin 1J6
50 Elite 23 Product Manual, Rev. A9.6.2 SCSI interface physical descriptionThe drives may be daisy-chained together or with other compatible SCSI devi
Elite 23 Product Manual, Rev. A 51A stub length of no more than 0.1 meter (0.33 foot) is allowed off the mainline interconnection with any con-nected
52 Elite 23 Product Manual, Rev. AThe drive device connector is a non-shielded 68-conductor connector consisting of two rows of 34 female pinswith adj
Elite 23 Product Manual, Rev. A 53Figure 15. Non-shielded 50-pin SCSI device connectorFigure 16. Non-shielded 68-pin SCSI device connector.100(2.54)2.
54 Elite 23 Product Manual, Rev. ATable 12: Single-ended signal/contact assignments for ST423451N drives*CAUTION: Connector contact 25 must not be con
Elite 23 Product Manual, Rev. A 55Table 13: Single-ended wide cable assignments for ST423451W drivesNotes [ ]: See page following Table 14.Signalname
56 Elite 23 Product Manual, Rev. ATable 14: Wide differential P cable assignments (non-shielded connector) for ST423451WD drivesNote. The minus sign n
Elite 23 Product Manual, Rev. A 57Notes [ ] for Tables 12, 13, and 14:[1] See Section 9.7.1 for detailed electrical characteristics of these signals.[
58 Elite 23 Product Manual, Rev. A9.7 Electrical descriptionST423451N and ST423451W models use single-ended interface signals. These signals must be t
Elite 23 Product Manual, Rev. A 599.7.2 Differential drivers/receiversTypical differential driver and receiver circuits used by ST423451WD drives are
Elite 23 Product Manual, Rev. A vContents1.0 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
60 Elite 23 Product Manual, Rev. ANotes.[1] Positive logic enables transmitter (+5 V = asserted).Negative logic enables receivers (0 V = asserted).[2]
Elite 23 Product Manual, Rev. A 619.8 Terminator requirementsST423451N and ST423451W drivesInternal disc drive I/O termination consists of active circ
62 Elite 23 Product Manual, Rev. A9.10 Disc drive SCSI timingTable 15: Disc drive SCSI timingDescriptionWaveformsymbol [1]Waveformtable [1] Typical ti
Elite 23 Product Manual, Rev. A 63Notes.[1] See the SCSI Interface Product Manual, part number 77738479, Section 4.5.[2] Maximum SCSI asynchronous in
Elite 23 Product Manual, Rev. A 6510.0 Seagate technical support servicesIf you need assistance installing your drive, consult your dealer. Dealers ar
66 Elite 23 Product Manual, Rev. ADirect-support servicesSeagate technical supportFor one-on-one help, you can talk to a technical support specialist
Elite 23 Product Manual, Rev. A 67IndexNumerics12 V current profile 203rd party reserve 41AabortSCSI message 39abort-tagSCSI message 39AC powe
68 Elite 23 Product Manual, Rev. ADC power requirements 19DCRT bit 40dedicated landing zone 5, 6default 36default mode parameter 31default
Elite 23 Product Manual, Rev. A 69humidity 23II/O circuitsdifferential 51single-ended 50IC terminators 7identified defect 29identifySCSI mes
vi Elite 23 Product Manual, Rev. A6.4.5 Air cleanliness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
70 Elite 23 Product Manual, Rev. Anon-shielded cable connectors 50notch and partition page 41Ooperating options 31option jumper 31location 3
Elite 23 Product Manual, Rev. A 71SCSI daisy-chain interface cabling 52SCSI ID 31SCSI interface cable requirements 50SCSI interface commands 4
72 Elite 23 Product Manual, Rev. AWwarranty 16wide data transfer requestSCSI message 39write and verify command 42write buffer command 42write
Seagate Technology, Inc.920 Disc Drive, Scotts Valley, California 95066-4544, USAPublication Number: 83329140, Preliminary Rev. A, Printed in USA
Elite 23 Product Manual, Rev. A viiList of FiguresFigure 1. Elite 23 disc drive (ST423451N drive shown) . . . . . . . . . . . . . . . . . . . . . . .
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