Seagate ST118202LW/LC manual Terminating the drive

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Cheetah 18 Installation Guide, Rev. A

LC drives

Terminating the drive

LC model drives do not have internal terminators or any other way of adding internal termination to the drive. You must provide external termination to these drives when termination is required. Since this drive is designed to be plugged into a back- panel or other host enclosure without cabling, this is normally done by enabling termination on the backpanel or plane.

Note. Use active (ANSI SCSI-2 Alternative 2) single-ended ter- minators when terminating a bus operating in single- ended mode. Use SPI-2-compliant active low voltage dif- ferential terminators when terminating a SCSI Ultra2 bus operating in LVD mode.

Terminator power

ST118202LC drives cannot be configured to provide termination power.

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Contents Cheetah Disc Drive ST118202LW/LC Installation Guide Contents Preface Electrostatic discharge protectionImportant safety information and precautions Page Wichtige Sicherheitshinweise Page Cheetah 18 Installation Guide, Rev. a Regulatory agency compliance Electromagnetic susceptibilityElectromagnetic compliance for the European Union Seagate Technology support services Online services SeaNET Seagate CompuServe forumFAX services SeaFAXDirect-support services Technical supportCustomer service centers Manufacturer’s representatives General description Cheetah 18 family drive ST118202LW shown Characteristics ST118202LW/LC DC power requirements ±5%1 +5 +12 Drive models General informationSingle-ended and low voltage differential modes Scsi ID jumpersPage Drive termination Terminator power Circuits and data path widthsCable characteristics for SE and LVD circuits Pin I/O connection to drive LW model Multiple-drive connection to host adapter Drive model LC with single 80-pin I/O and power connector Providing adequate cooling Kühlung des Systems Suggested air flow Mounting the drive and connecting cables Installation des Laufwerkes und Anschluß der KabelCheetah 18 Installation Guide, Rev. a DC power connector Abbildung 8. Gleichstromanschluß Hinweis Page Mounting configuration dimensions LW model Mounting configuration dimensions LC model Formatting the drive Quick reference desktop system notesSetting the Scsi ID jumpers LW drivesTerminating the drive Setting terminator power jumpers Other applicable jumper options Several other jumper options are available as illustratedAdditional jumper options Drive Active indicator Drive Active LED indicator connections are shown belowLC drives Terminating the drive Other option jumpers are available as illustrated below Drive Active indicator