Seagate ST31250N/ND, ST31250W/WD/WC/DC, ST32550W/WD/WC/DC manual Term. power to Scsi bus default

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40Barracuda 2LP Installation Guide, Rev. E

W/WD drives

Terminator power

There are four possible terminator power configurations for ST31250W and ST32550W drives (see Figure 12). You will not normally need to change this option and can leave the drive configured as it was shipped from the factory.

ST31250WD and ST32550WD 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 12.

	ST31250W and ST32550W
	Pin 6	J1 Connector	ST31250WD and
	Pin 6	Pin 1	ST31250WD and
		Pin 1	ST32550WD
		Pin 2	ST32550WD
		Pin 2	J1 Connector
		Pin 1	Pin 4
			Pin 4
			Pin 3
			J1	Pin 1
	ST31250W and ST32550W		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 2	Pin 4
	ST31250WD and ST32550WD Pin 1			Pin 3

Term. power to SCSI bus (default)

Figure 12. Setting terminator power jumpers

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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 ForumSeaFONE 408 SeaTDD 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