Seagate ST15150W/WD/WC, ST15150N/ND/DC manual DrivesWC/DC

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drivesWC/DC

46	Barracuda 4 Installation Guide, Rev. E

Setting the SCSI ID jumpers

The SCSI ID for WC and DC drives is normally set over the SCSI bus by the host system using connector contacts 39 (ID0), 40 (ID2), 79 (ID1), and 80 (ID3). Systems designers may, optionally, install a remote operator panel connection to set the SCSI ID. Figure 21 illustrates the SCSI ID pins used for this purpose.

Terminating the drive

ST15150WC and ST15150DC drives do not have inter- nal terminators or any other way of adding internal termination to the drive. You must provide single-ended external active termination (ANSI SCSI-2 Alternative 2) to these drives when termination is required.

Synchronizing spindles

Spindle synchronization for WC and DC drives is nor- mally handled on the SCSI bus by the host system using connector contact 37 for the spindle sync reference signal. System designers may, optionally, install a spindle sync cable using pin 6 on the J4 connector to provide +SSREF (see Figure 21).

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Contents Barracuda 4 Family ST15150N/ND/DC ST15150W/WD/WC Contents Preface Electrostatic discharge protectionImportant safety information and precautions Page Barracuda 4 Installation Guide, Rev. E Wichtige Sicherheitshinweise Barracuda 4 Installation Guide, Rev. E Page Barracuda 4 Installation Guide, Rev. E Page SeaFAX USA 408 438-2620 England CompuServe ForumSeaFONE 408 SeaTDD 408SeaBOARD Telephone Location NumberGeneral description Barracuda 4 disc drive W/WD WD/WC/DC ND/WD/DC Barracuda 4 Installation Guide, Rev. E From previous Drive models General informationScsi ID jumpers Drive termination Scsi bus terminationTerminator power Synchronizing spindles optionalOther applicable jumper options Providing adequate cooling Kühlung des Systems Suggested air flow Abbildung 5. Empfohlener Luftstromverlauf Mounting the drive and connecting cables Installation des Laufwerkes und Anschluß der Kabel Dimensions ST15150N/ND Abbildung 6. Laufwerkabmessungen Dimensions ST15150W/WD Abbildung 7. Laufwerkabmessungen Dimensions ST15150WC/DC Abbildung 8. Laufwerkabmessungen Page DC power connector Abbildung 9. Gleichstromanschluß Hinweis Formatting the drive Setting the Scsi ID jumpers ScsiTerminating the drive Terminating the driveDrivesN/ND Synchronizing spindles ScsiSeveral other jumper options are available as illustrated DrivesW/WD WD drives Power Connector ST15150W/WD Pin DC Power Write Protect option WP Write Protect = On disables writing MTR DrivesWC/DC Connecting remote LEDs Jumper options Barracuda 4 Installation Guide, Rev. E Barracuda 4 Installation Guide, Rev. E