Seagate ST31250W/WD/WC/DC, ST32550W/WD/WC/DC, ST31250N/ND manual Characteristics ST31250 ST32550

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14	Barracuda 2LP Installation Guide, Rev. E
Characteristics		ST31250	ST32550
Interface		Fast SCSI-21	Fast SCSI-21
Capacity
Unformatted		1,205.3 Mbytes	2,541.3 Mbytes
Formatted2		1,020.9 Mbytes	2,147.4 Mbytes
Recording
Cylinders (user)		3,711	3,510
Read/write data heads		5	11
Servo heads		1	1
Avg bytes/track		64,160	64,160
Seek time3
Average read		8.0 msec	8.0 msec
Average write		9.0 msec	9.0 msec
Disc rotation
RPM		7,200	7,200
Average latency		4.17 msec	4.17 msec
Internal transfer rate		47.5 to 72.0	49.4 to 72.0
(Mbits/sec)
Max sync. SCSI transfer rate
N/ND		10 Mbytes/sec	10 Mbytes/sec
W/WD/WC/DC		20 Mbytes/sec	20 Mbytes/sec
Multi-segmented cache		512 Kbytes	512 Kbytes

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Contents Barracuda 2LP Contents Preface Electrostatic discharge protectionImportant safety information and precautions Page Barracuda 2LP Installation Guide, Rev. E Wichtige Sicherheitshinweise Barracuda 2LP Installation Guide, Rev. E Page Barracuda 2LP Installation Guide, Rev. E Page SeaFAX USA 408 438-2620 England CompuServe ForumSeaTDD 408 SeaFONE 408SeaBOARD Location Modem number General description Characteristics ST31250 ST32550 Barracuda 2LP Installation Guide, Rev. E Amps Barracuda 2LP Installation Guide, Rev. E Barracuda 2LP Installation Guide, Rev. E Drive models General informationScsi ID jumpers Drive termination Scsi bus terminationTerminator power Synchronizing spindlesProviding adequate cooling Kühlung des Systems Suggested air flow Abbildung 3. Empfohlener Luftstromverlauf Mounting the drive and connecting cables Installation des Laufwerkes und Anschluß der Kabel Barracuda 2LP Installation Guide, Rev. E DC power connector Abbildung 4. Gleichstromanschluß Hinweis Formatting the drive Enabling write cache Setting the Scsi ID jumpers Setting the Scsi IDTerminating the drive Terminating the driveSetting terminator power jumpers Spindle sync connectors Other applicable jumper options Several other jumper options are available as illustratedWD drives Terminating the drive ST32550W shown Term. power to Scsi bus default Scsi I/O Other option jumpers are available as illustrated below Scsi ID = WC/DC drives Applicable jumper options Option jumpers are available as illustrated belowPin J4 Pin 1 front view of J4 Page Page