Seagate Cheetah 4LP Manual

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cheetah 4LP Family:. . . . . . . . . . . . . . . . .

Cheetah 4LP Product Manual, Rev. B 11.0 ScopeThis manual describes the Seagate Technology®, Inc. Cheetah 4LP™ disc drives. Cheetah 4LP drives support

Cheetah 4LP Product Manual, Rev. B 32.0 Applicable standards and reference documentationThe drive has been developed as a system peripheral to the hig

4 Cheetah 4LP Product Manual, Rev. BAustralian C-TickIf this model has the C-Tick Marking it complies with the Australia/New Zealand Standard AS/NZS35

Cheetah 4LP Product Manual, Rev. B 53.0 General descriptionCheetah 4LP drives combine magnetoresistive (MR) heads, partial response/maximum likelihood

6 Cheetah 4LP Product Manual, Rev. B Figure 2. Cheetah 4LP family drive

Cheetah 4LP Product Manual, Rev. B 73.1 Standard featuresThe Cheetah 4LP family has the following standard features:• Integrated SCSI controller• Sing

8 Cheetah 4LP Product Manual, Rev. B3.5 Unformatted and formatted capacitiesFormatted capacity depends on the number of spare reallocation sectors res

Cheetah 4LP Product Manual, Rev. B 94.0 Performance characteristics4.1 Internal drive characteristics (transparent to user)4.2 SCSI performance charac

10 Cheetah 4LP Product Manual, Rev. BSCSI interface data transfer rate (asynchronous) [4]:Maximum instantaneous (16 bit wide) 10.0 Mbytes/sec [5]Maxim

Cheetah 4LP Product Manual, Rev. B 11ual, P/N 77738479. Prefetch and cache operation are independent features from the standpoint that each isenabled

12 Cheetah 4LP Product Manual, Rev. Bing nothing to do with whether or not read and write caching is enabled or disabled. When a write command isissue

Cheetah 4LP Product Manual, Rev. B 135.0 Reliability specificationsThe following reliability specifications assume correct host/drive operational inte

14 Cheetah 4LP Product Manual, Rev. B5.2 Reliability and serviceYou can enhance the reliability of Cheetah 4LP disc drives by ensuring that the drive

Cheetah 4LP Product Manual, Rev. B 154. The SCSI device being removed or inserted shall employ transceivers that conform to the requirements forglitch

16 Cheetah 4LP Product Manual, Rev. BDetermining rateS.M.A.R.T. monitors the rate at which errors occur and signals a predictive failure if the rate o

Cheetah 4LP Product Manual, Rev. B 176.0 Physical/electrical specificationsThis section provides information relating to the physical and electrical c

18 Cheetah 4LP Product Manual, Rev. B[8] No terminator power. See Section 9.9.[9] Seeking is defined as a third-stroke seek at OD. A command is issued

Cheetah 4LP Product Manual, Rev. B 19 Figure 3. Typical Cheetah 4LP family drive +12 V current profile6.3 Power dissipationFor drives with sing

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cheetah 4LP Family:. . . . . . . . . . . . . . . . .

20 Cheetah 4LP Product Manual, Rev. B6.4.1 Temperaturea. OperatingWith cooling designed to maintain the case temperatures of Table 3, column 2, the dr

Cheetah 4LP Product Manual, Rev. B 21 Figure 4. Locations of PCB components listed in Table 321431243“N” Model DrivesJAAJ“WD” Model DrivesCAAJ“W

22 Cheetah 4LP Product Manual, Rev. B6.4.2 Relative humidityThe values below assume that no condensation on the drive occurs.a. Operating5% to 95% non

Cheetah 4LP Product Manual, Rev. B 23d. PackagedDisc drives shipped as loose load (not palletized) general freight will be packaged to withstand drops

24 Cheetah 4LP Product Manual, Rev. B6.4.4.2 Vibrationa. Operating—normalThe drive as installed for normal operation, complies with the complete speci

Cheetah 4LP Product Manual, Rev. B 256.5 Mechanical specificationsThe following nominal dimensions are exclusive of the decorative front panel accesso

26 Cheetah 4LP Product Manual, Rev. B Figure 7. Mounting configuration dimensions for models “W” and “WD”EHSKJ[4][2][9]U [7][7] VJ2J6 LEDXW [6]Mo

Cheetah 4LP Product Manual, Rev. B 27 Figure 8. Mounting configuration dimensions for models “WC” and “DC”HSKJ[4][8][7]MillimetersInches5.7504.00

Cheetah 4LP Product Manual, Rev. B 297.0 Defect and error managementThe drive, as delivered, complies with this specification. The read error rate and

© 1997 Seagate Technology, Inc. All rights reservedPublication number: 83329120, Rev. BJuly 1997Seagate, Seagate Technology, and the Seagate logo are

30 Cheetah 4LP Product Manual, Rev. B[1] Setting these retry counts to a value below the default setting could result in degradation of the unrecov-er

Cheetah 4LP Product Manual, Rev. B 318.0 InstallationThe first thing to do when installing a drive is to set the drive ID (select) on the SCSI bus and

32 Cheetah 4LP Product Manual, Rev. B Figure 9. Model “N” option select jumper connectorsNotes for Figures 9, 10, and 11 are in Section 8.1.1.J6J

Cheetah 4LP Product Manual, Rev. B 33 Figure 10. Cheetah 4LP family drive ID select for models “W” and “WD”J6J2Pin 1EndSCSI ID = 0 (default)Jum

34 Cheetah 4LP Product Manual, Rev. B Figure 11. Model ST34501WC/DC option select jumper connectorsJ6 [4]Delay Motor StartEnable Motor StartWrite

Cheetah 4LP Product Manual, Rev. B 358.1.1 Notes for Figures 9, 10, and 11.[1] Notes explaining the functions of the various jumpers on jumper header

36 Cheetah 4LP Product Manual, Rev. B8.1.2 Function description*See Figure 10 for pins used for Termpower.J2 jumperinstallation Jumper function descri

Cheetah 4LP Product Manual, Rev. B 378.2 Drive orientationThe balanced rotary arm actuator design of the drive allows it to be mounted in any orientat

38 Cheetah 4LP Product Manual, Rev. B8.4 Drive mountingWhen mounting the drive using the bottom holes (x-y plane in Figure 5) care must be taken to en

Cheetah 4LP Product Manual, Rev. B 399.0 Interface requirementsThis section describes Cheetah 4LP interface requirements.9.1 General descriptionThis s

Revision status summary sheet Notice.Product Manual 83329120 is Volume 1 of a two-volume document with the SCSI interface information inthe Volum

40 Cheetah 4LP Product Manual, Rev. B[2] Not applicable to “N” models.9.3 SCSI interface commands supportedTable 7 following lists the SCSI interface

Cheetah 4LP Product Manual, Rev. B 41Mode select (same pages as Mode Sense command) 15h Y [2]Mode select (10) 55h YMode sense 1Ah Y [2]Caching paramet

42 Cheetah 4LP Product Manual, Rev. B[1] The drive can format to any even number of bytes per sector from 180 to 4,096[2] Table 9 shows how individual

Cheetah 4LP Product Manual, Rev. B 43Table 8 lists the Standard Inquiry command data that the drive should return to the initiator per the format give

44 Cheetah 4LP Product Manual, Rev. BCurrent values are volatile values currently being used by the drive to control its operation. A Mode Selectcomma

Cheetah 4LP Product Manual, Rev. B 45The following tables list the values of the data bytes returned by the drive in response to the Mode Sense com-ma

46 Cheetah 4LP Product Manual, Rev. B[1] Though byte 12, bit 7 (A0) is shown as changeable, the FSW function governed by that bit is not imple-mented

Cheetah 4LP Product Manual, Rev. B 479.4 SCSI bus conditions and miscellaneous features supportedAsynchronous SCSI bus conditions supported by the dri

48 Cheetah 4LP Product Manual, Rev. B9.5 Synchronous data transfer9.5.1 Synchronous data transfer periods supportedTable 11 and Section 9.5.2 list syn

Cheetah 4LP Product Manual, Rev. B 49 Figure 13. Physical interface for “N” model drivesJ6J2Pin 1SCSI I/OConnectorPin 1DC PowerConnectorJ1J1Pin

50 Cheetah 4LP Product Manual, Rev. B Figure 14. Model “W” and “WD” drive physical interface (68-pin J1 SCSI I/O connector) Note: See Tabl

Cheetah 4LP Product Manual, Rev. B 519.6.2 SCSI interface physical descriptionThe drives may be daisy-chained together or with other compatible SCSI d

52 Cheetah 4LP Product Manual, Rev. B9.6.3.1 Single-ended I/O circuits (“N” and “W” models)The maximum total cable length allowed with drives having s

Cheetah 4LP Product Manual, Rev. B 539.6.4.1 Mating connectors for “N” modelsThe nonshielded cable connector should be a 50-conductor connector consis

54 Cheetah 4LP Product Manual, Rev. BRecommended mating 80-position PCB mount connectors: Right-angle to PCB connectorsSeagate P/N: 77678559 Amp US P/

Cheetah 4LP Product Manual, Rev. B 55 Figure 17. Nonshielded 50-pin SCSI device connector used on “N” models1234.100(2.54)"D" ± .010

56 Cheetah 4LP Product Manual, Rev. B Figure 18. Nonshielded 68-pin SCSI device connector used on “W” and “WD” models.0787(2.00).519(13.18).3

Cheetah 4LP Product Manual, Rev. B 57 Figure 19. Nonshielded 80-pin SCSI “SCA-2” connector used on “WC” and “DC” models.060(1.52).052(1.32).0

58 Cheetah 4LP Product Manual, Rev. BTable 13a. Model “N,” single-ended I/O, 50-conductor, signal/contact assignments*CAUTION: Connector contact 25 mu

Cheetah 4LP Product Manual, Rev. B 59Table 13b. “W” models single-ended I/O cable 68-conductor signal/contact assignmentsNotes [ ]: See page following

Cheetah 4LP Product Manual, Rev. B vContents1.0 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

60 Cheetah 4LP Product Manual, Rev. BTable 13c. “WD” models differential cable 68-conductor signal/pin assignments (nonshielded connector)[13]Note. Th

Cheetah 4LP Product Manual, Rev. B 61Table 13d. “WC” models single ended I/O, 80-conductor cable signal/contact assignments Notes [ ]: See page follow

62 Cheetah 4LP Product Manual, Rev. BTable 13e. “DC” differential models, 80-pin I/O connector pin assignments (nonshielded connector) [13]Notes [ ]:

Cheetah 4LP Product Manual, Rev. B 63Notes [ ] for Tables 13a through 13e.[1] See Section 9.7.1 or 9.6.4.2 for detailed electrical characteristics of

64 Cheetah 4LP Product Manual, Rev. B9.7 Electrical description“N” and “W” models use single-ended interface signals. These signals must be terminated

Cheetah 4LP Product Manual, Rev. B 659.7.2 Differential drivers/receiversDifferential drivers and receivers are used by the “WD” and “DC” models. Typi

66 Cheetah 4LP Product Manual, Rev. B Notes.[1] Positive logic enables transmitter (+5 V = asserted)Negative logic enables receivers (0 V = ass

Cheetah 4LP Product Manual, Rev. B 679.8 Terminator requirementsInternal disc drive I/O termination (provided only in model “N” and “W” drives single

68 Cheetah 4LP Product Manual, Rev. B9.10 Disc drive SCSI timingTable 14: Disc drive SCSI timingDescriptionWaveformsymbol [1]Waveformtable [1] Typical

Cheetah 4LP Product Manual, Rev. B 69Notes.[1] See the SCSI Interface Product Manual, P/N 77738479 (Volume 2), Section 4.5.[2] Maximum SCSI asynchrono

vi Cheetah 4LP Product Manual, Rev. B6.4.2 Relative humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cheetah 4LP Product Manual, Rev. B 7110.0 Seagate technical support servicesIf you need assistance installing your drive, consult your dealer. Dealers

72 Cheetah 4LP Product Manual, Rev. BDirect-support servicesSeagate technical supportFor one-on-one help, you can talk to a technical support speciali

Cheetah 4LP Product Manual, Rev. B 73IndexNumerics50-conductor connector 5350-conductor flat cable 5150-pin connector 54, 5568-conductor conne

74 Cheetah 4LP Product Manual, Rev. BDdaisy-chain 18, 51, 53, 54, 64, 6780-conductor 53terminating 51data correction 13data transfer

Cheetah 4LP Product Manual, Rev. B 75flat ribbon cable 63flaw reallocation 10formatcommand 9drive 42low/high level 31time 10formatted capa

76 Cheetah 4LP Product Manual, Rev. Bmode sense command 43, 45mode sense command page 08h 11mode sense data 43, 45mode sense value 44model

Cheetah 4LP Product Manual, Rev. B 77read error rate 13, 29read operation 11read power dissipation 19read retry count 29read/write head 9r

78 Cheetah 4LP Product Manual, Rev. Bstandards 3start unit command 36start/stop time 10status reporting 30status supported 47STIR algorithm

Cheetah 4LP Product Manual, Rev. B viiFiguresFigure 1. Cheetah 9 family drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Seagate Technology, Inc.920 Disc Drive, Scotts Valley, California 95066-4544, USAPublication Number: 83329120, Rev. B, Printed in USA