Seagate ST31250N/ND, ST31250W/WD/WC/DC, ST32550W/WD/WC/DC, ST32550N/ND manual Scsi ID jumpers

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20	Barracuda 2LP Installation Guide, Rev. E

*This mounting procedure does not apply to WC or DC model drives. To mount a WC or DC drive, plug the drive into the system's single connector attachment (SCA) position on the system's back panel.

SCSI ID jumpers

Each device on the SCSI chain must have a unique SCSI ID. The host system’s SCSI controller usually uses the highest-numbered ID available; therefore the lower-num- bered SCSI IDs are normally used for the other SCSI devices such as this Barracuda disc drive.

Note. Most SCSI controllers (host adapters) allow you to skip a SCSI ID. For example, you can have ID0, ID1, and ID3 (skipping ID2). Other controllers do not allow this so be sure to refer to your system or controller user’s manual for details about its re- quirements for proper SCSI device installation.

Most Barracuda disc drives are factory set with the SCSI ID set at 0. To change the SCSI ID, refer to the appropri- ate drive section for your model.

If, after completing the installation process, the drive’s LED does not show on/off activity when the host is trying to communicate with the drive, a duplicate SCSI ID may be the problem. If this is the case, change the ID so that each device on the SCSI chain has its own unique ID.

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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