Seagate ST423451N/W/WD manual Drive characteristics

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Elite 23 Installation Guide, Rev. A

13

Table 1: Drive characteristics

 

Interface

UltraSCSI1

Capacity

 

Unformatted

29.6 Gbytes

Formatted2

23.4 Gbytes

Recording

 

Cylinders (user)

6,880

Read/write data heads

28

Servo heads

Embedded

Seek time (typical)3

 

Average read

13.2 msec

Average write

14.2 msec

Disc rotation

 

r/min

5,400 +0.5%

Average latency

5.55 msec

Internal transfer rate

85.9 to 123

(Mbits/sec, variable with zone)

 

Max sync. SCSI transfer rate

 

N

20 Mbytes/sec

W/WD

40 Mbytes/sec

Multi-segmented cache

2,048 Kbytes

1Can also be operated according to SCSI-1 and SCSI-2 proto- cols.

2Standard factory units are formatted as follows:

512 data bytes per sector

6 cylinders per region

82 spares per region

3Not including on-board controller overhead.

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Contents Elite Disc Drive ST423451N/W/WD Contents Electrostatic discharge protection PrefaceImportant safety information and precautions Page Wichtige Sicherheitshinweise Page European Union Compliance Page Seagate Technology Online services SeaFONE at 1-800-SEAGATESeaNET SeaBOARD BBS Location Modem numberSeagate Technology Forum on CompuServe Seagate technical support FAX Seagate Technology FAX servicesSeaFAX Location Telephone numberSeaTDD Seagate technical support lineGeneral description Drive characteristics Elite 23 Installation Guide, Rev. a Dimensions of the drive General information Drive modelsScsi ID jumpers Drive termination Circuits and data path widths Terminator powerCable characteristics for single-ended circuits Fifty-pin I/O connection to drive Multiple drive connection to host adapter Multiple-drive connection to host adapter Providing adequate cooling Kühlung des Systems Suggested air flow Abbildung 4. Empfohlener Luftstromverlauf Installation des Laufwerkes und Anschluß der Kabel Mounting the drive and connecting cablesElite 23 Installation Guide, Rev. a Pin Gleichstrom Pin PowerHinweis Page Mounting configuration dimensions Quick reference desktop system notes Formatting the driveSetting the Scsi ID on N models Setting the Scsi ID jumpersTerminating the drive Terminating the driveSetting terminator power jumpers on N models Additional jumper options Other applicable jumper optionsWD drives Terminating the drive ST423451W shown Setting terminator power jumpers on W models Other option jumpers are available as illustrated below LED indicator connections for all drive models Active, Ready, and Fault indicatorsPage Page