Seagate ST15150N/ND/DC, ST15150W/WD/WC manual Drive termination, Scsi bus termination

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Barracuda 4 Installation Guide, Rev. E

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Drive termination

If you are installing the drive in a system that has other SCSI devices installed, terminate only the end devices on the SCSI chain. A SCSI “device” is any disc drive, scanner, tape backup unit, or other piece of hardware connected to your system using the SCSI bus.

The top example in Figure 4 shows an internal hard disc at one end of the SCSI bus with the SCSI controller at the other end (both are terminated). The bottom ex- ample shows two additional SCSI devices connected externally—this means the SCSI controller is no longer on the end of the SCSI chain and should not be termi- nated.

For information about how to terminate your drive, refer to the appropriate drive-specific section.

Internal SCSI cable

 

 

 

 

 

 

 

 

Internal

 

Internal

 

Controller

SCSI device

 

SCSI device

 

 

 

 

 

 

 

 

 

 

 

 

 

Terminate

Internal SCSI cable

 

 

 

 

 

 

 

 

Internal

 

Internal

 

Controller

SCSI device

 

SCSI device

 

 

 

 

 

 

 

 

 

 

 

 

 

External

SCSI cable

External

SCSI device

External

SCSI device

Terminate

Figure 4. SCSI bus termination

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Contents Barracuda 4 Family ST15150N/ND/DC ST15150W/WD/WC Contents Electrostatic discharge protection PrefaceImportant 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 CompuServe Forum SeaFAX USA 408 438-2620 EnglandSeaBOARD SeaFONE 408SeaTDD 408 Location Number TelephoneGeneral description Barracuda 4 disc drive W/WD WD/WC/DC ND/WD/DC Barracuda 4 Installation Guide, Rev. E From previous General information Drive modelsScsi ID jumpers Scsi bus termination Drive terminationOther applicable jumper options Terminator powerSynchronizing spindles optional 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 Scsi Setting the Scsi ID jumpersTerminating the drive Terminating the driveDrivesN/ND Scsi Synchronizing spindlesSeveral 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