Seagate ST11950N/ND/W/WD, ST12550N/ND/W/WD manual Important safety information and precautions

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2 ST11950 and ST12550 Installation Guide, Rev. D

Ground yourself to the drive whenever the drive elec- tronics are or will be exposed. Connect yourself to ground with a wrist strap (Seagate part number 12263496). Connection may be made to any grounded metal assembly. As a general rule, remember that you and the drive electronics must all be grounded to avoid potentially damaging static discharges.

Turn off the power before removing or installing the DC power cable.

Do not remove any circuit boards from the drive.

Never use an ohmmeter on any circuit boards.

Important safety information and precautions

Caution. Use forced-air ventilation when bench-testing the drive to ensure proper cooling of drive components.

Use proper safety and repair techniques for safe, reliable operation of this unit. Service should be done only by qualified persons. We recommend the procedures in this manual as effective ways of servicing the unit. Some procedures require the use of special tools. For proper maintenance and safety, you must use these tools as recommended.

The procedures in this manual and labels on the unit contain warnings and cautions that must be carefully

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Contents Barracuda 1 Disc Drive ST11950N/ND/W/WD ST12550N/ND/W/WD Contents ST11950 and ST12550 Installation Guide, Rev. D Electrostatic discharge protectionImportant safety information and precautions Page ST11950 and ST12550 Installation Guide, Rev. D Wichtige Sicherheitshinweise Page Page Page Page 10 ST11950 and ST12550 Installation Guide, Rev. D SeaFAX USA 408 438-2620 EnglandSeaFONE 408 SeaTDD 408Telephone SeaBOARDLocation Number 12 ST11950 and ST12550 Installation Guide, Rev. D General descriptionBarracuda 1 and 2 disc drive N/ND type 14 ST11950 and ST12550 Installation Guide, Rev. D Characteristics ST11950N/ND ST11950W/WDCharacteristics ST12550N/ND ST12550W/WD 16 ST11950 and ST12550 Installation Guide, Rev. D AmpsST11950 and ST12550 Installation Guide, Rev. D 18 ST11950 and ST12550 Installation Guide, Rev. D From previousInitial setup information 20 ST11950 and ST12550 Installation Guide, Rev. D Setting the Scsi ID jumpersSetting the Scsi ID on N- and ND-type drives 22 ST11950 and ST12550 Installation Guide, Rev. D Setting the Scsi ID on W- and WD-type drivesTerminating the drive Scsi bus terminationInstalling terminator packs ST11950N shown ST11950N and ST12550N drivesST11950W and ST12550W drives 26 ST11950 and ST12550 Installation Guide, Rev. D Enabling termination On ST11950W and ST12550W drivesTerminator power Termination is supplied28 ST11950 and ST12550 Installation Guide, Rev. D Changing other applicable jumper optionsScsi 30 ST11950 and ST12550 Installation Guide, Rev. D Scsi I/ORES PAR DMS RES MTR WP 32 ST11950 and ST12550 Installation Guide, Rev. D Synchronizing spindlesJ5 Pin 34 ST11950 and ST12550 Installation Guide, Rev. D ST11950N/ND ST12550N/ND DrivesProviding adequate cooling 36 ST11950 and ST12550 Installation Guide, Rev. D Kühlung des SystemsAbove unit Über der Einheit Under unit Unter der Einheit 38 ST11950 and ST12550 Installation Guide, Rev. D Mounting the drive and connecting cablesInstallation des Laufwerkes und Anschluß der Kabel 40 ST11950 and ST12550 Installation Guide, Rev. D Dimensions Abbildung 15. LaufwerkabmessungenPage DC power connector Abbildung 16. Gleichstromanschluß Hinweis Page Formatting the drive