Seagate ST12550N/ND/W/WD, ST11950N/ND/W/WD manual ST11950W and ST12550W drives

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ST11950 and ST12550 Installation Guide, Rev. D 25

Note. All single-ended terminators must be ANSI

SCSI-2 alternative 2 active terminators.

To install terminators, carefully insert the terminator’s pins firmly into the socket’s holes. Note that pin 1 on the pack is identified by a dot, a number one, or a notch.

To remove termination, remove the terminator packs by carefully pulling them out of their sockets.

ST11950W and ST12550W drives

ST11950W and ST12550W drives are equipped with permanently mounted IC terminators. This means you can either enable or disable termination using jumpers as described below.

To terminate ST11950W and ST12550W drives (enable termination), install a jumper on J4 pins 11 and 12 as shown in Figure 7.

To remove termination (disable termination), remove the jumper from J4 pins and 11 and 12.

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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 SeaTDD 408 10 ST11950 and ST12550 Installation Guide, Rev. DSeaFAX USA 408 438-2620 England SeaFONE 408SeaBOARD TelephoneLocation Number 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