Seagate ST32550W/WD/WC/DC, ST31250W/WD/WC/DC, ST31250N/ND manual Setting terminator power jumpers

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Barracuda 2LP Installation Guide, Rev. E

35

Terminator power

N/ND drives

There are four possible terminator power configurations for ST31250N and ST32550N drives (see Figure 7). You will not normally need to change this option and can leave the drive configured as it was shipped from the factory.

ST31250ND and ST32550ND drives should be config- ured with a jumper connecting J1 pins 1 and 3 (and no jumper on J1 pins 2 and 4) as illustrated in Figure 7.

ST31250N and ST32550N
J1 Connector
Pin 6
Pin 1	ST31250ND and
	ST32550ND
	J1 Connector
	Pin 1
	Pin 2
	J1	Pin 1
	J1
ST31250N and ST32550N	Pin 6	Pin 2
Term. power from drive (default)
Term. power to SCSI bus
Term. power from SCSI bus
Term. power to SCSI bus
and drive
	J1	Pin 1
ST31250ND and ST32550ND		Pin 2
		Pin 2
Term. power to SCSI bus (default)

Figure 7. Setting terminator power jumpers

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Contents Barracuda 2LP Contents Electrostatic discharge protection PrefaceImportant 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 CompuServe Forum SeaFAX USA 408 438-2620 EnglandSeaTDD 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 General information Drive modelsScsi ID jumpers Scsi bus termination Drive terminationSynchronizing spindles Terminator powerProviding 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 Setting the Scsi ID jumpersTerminating the drive Terminating the driveSetting terminator power jumpers Spindle sync connectors Several other jumper options are available as illustrated Other applicable jumper optionsWD 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 Option jumpers are available as illustrated below Applicable jumper optionsPin J4 Pin 1 front view of J4 Page Page