Seagate ST12550N/ND/W/WD, ST11950N/ND/W/WD manual Terminator power, Termination is supplied

Page 29

ST11950 and ST12550 Installation Guide, Rev. D 27

Terminator power

Single-ended (N and W) drives have four valid configu- rations for terminator power (see Figure 8). Differential (ND and WD drives) must be configured with a jumper on J01 pins 1 and 3 only.

	J01 location on “N”
	and “ND” drives
	J01	Pin
		2
	Pin 1
	Pin 3
		Pin
		4
	Terminator power options.	J4
	These jumpers determine how	J4
	These jumpers determine how
	termination is supplied.

J01 location on “W”

and “WD” drives

J01

Pin 1

J4

* Terminator power from the drive. The drive provides its own terminator power.

* Terminator power from TERMPWR on the SCSI bus.

Terminator power to the SCSI bus. The drive supplies power to TERMPWR on the SCSI bus.

* Terminator power to the SCSI bus and drive.

* Valid for single-ended (“N” and “W”) drives only.

Figure 8. Setting terminator power jumpers

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Contents Barracuda 1 Disc Drive ST11950N/ND/W/WD ST12550N/ND/W/WD Contents Electrostatic discharge protection ST11950 and ST12550 Installation Guide, Rev. DImportant safety information and precautions Page ST11950 and ST12550 Installation Guide, Rev. D Wichtige Sicherheitshinweise Page Page Page Page SeaFAX USA 408 438-2620 England 10 ST11950 and ST12550 Installation Guide, Rev. DSeaFONE 408 SeaTDD 408Location Number SeaBOARDTelephone General description 12 ST11950 and ST12550 Installation Guide, Rev. DBarracuda 1 and 2 disc drive N/ND type Characteristics ST11950N/ND ST11950W/WD 14 ST11950 and ST12550 Installation Guide, Rev. DCharacteristics ST12550N/ND ST12550W/WD Amps 16 ST11950 and ST12550 Installation Guide, Rev. DST11950 and ST12550 Installation Guide, Rev. D From previous 18 ST11950 and ST12550 Installation Guide, Rev. DInitial setup information Setting the Scsi ID jumpers 20 ST11950 and ST12550 Installation Guide, Rev. DSetting the Scsi ID on N- and ND-type drives Setting the Scsi ID on W- and WD-type drives 22 ST11950 and ST12550 Installation Guide, Rev. DScsi bus termination Terminating the driveST11950N and ST12550N drives Installing terminator packs ST11950N shownST11950W and ST12550W drives Enabling termination On ST11950W and ST12550W drives 26 ST11950 and ST12550 Installation Guide, Rev. DTermination is supplied Terminator powerChanging other applicable jumper options 28 ST11950 and ST12550 Installation Guide, Rev. DScsi Scsi I/O 30 ST11950 and ST12550 Installation Guide, Rev. DRES PAR DMS RES MTR WP Synchronizing spindles 32 ST11950 and ST12550 Installation Guide, Rev. DJ5 Pin ST11950N/ND ST12550N/ND Drives 34 ST11950 and ST12550 Installation Guide, Rev. DProviding adequate cooling Kühlung des Systems 36 ST11950 and ST12550 Installation Guide, Rev. DAbove unit Über der Einheit Under unit Unter der Einheit Mounting the drive and connecting cables 38 ST11950 and ST12550 Installation Guide, Rev. DInstallation des Laufwerkes und Anschluß der Kabel Dimensions Abbildung 15. Laufwerkabmessungen 40 ST11950 and ST12550 Installation Guide, Rev. DPage DC power connector Abbildung 16. Gleichstromanschluß Hinweis Page Formatting the drive