Seagate ST19171DC, ST19171N, ST19171WD, ST19171WC manual Terminating the drive ST19171W shown

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38

Barracuda 9 Installation Guide, Rev. B

W/WD drives

Terminating the drive

ST19171W drives are terminated with permanently mounted IC active terminators. If you install one of these drives and it is not on the end of the SCSI bus, disable the terminators by removing the jumper from pins 15 and 16 of connector J2. If you install the drive on the end of the SCSI bus, enable termination by installing a jumper on pins 15 and 16 of connector J2 (see Figure 11).

Note. Use active (ANSI SCSI-2 Alternative 2) terminators when terminating the bus.

ST19171WD drives do not have internal terminators or any other way of adding internal termination to the drive. You must provide external differential termination to these drives when termination is required.

Pin 1

J2

R

 

T D M W P E T T

 

E S E P D S P P

*Enable SCSI terminator (default)

*Disable SCSI terminator

*ST19171W only

 

J6

J2

 

SCSI I/O J1

 

 

 

 

Connector

 

Drive

 

 

Front

 

J2 Jumper Type

 

DC Power

(enlarged to

 

Connector

show detail)

 

 

Figure 11. Terminating the drive (ST19171W shown)

Image 40
Contents ST19171N/W/WD/WC/DC Contents Preface Electrostatic discharge protectionImportant safety information and precautions Page Wichtige Sicherheitshinweise Barracuda 9 Installation Guide, Rev. B Barracuda 9 Installation Guide, Rev. B Page Regulatory agency compliance Electromagnetic susceptibilityElectromagnetic compliance for the European Union Seagate technical support services Online servicesSeagate CompuServe forum FAX services SeaFAXDirect-support services Seagate technical supportCustomer service centers Manufacturer’s representativesGeneral description Characteristics ST19171 OD DC Barracuda 9 Installation Guide, Rev. B Page Drive models General informationScsi ID jumpers Drive terminationScsi bus termination Circuits and data path widths Terminator powerProviding adequate cooling Barracuda 9 Installation Guide, Rev. B Kühlung des Systems Suggested air flow Abbildung 3. Empfohlener Luftstromverlauf Mounting the drive and connecting cables Installation des Laufwerkes und Anschluß der KabelBarracuda 9 Installation Guide, Rev. B DC power connector Abbildung 4. Gleichstromanschluß Hinweis Formatting the drive Quick reference desktop system notesSetting the Scsi ID jumpers DrivesTerminating the drive Terminating the driveSetting terminator power jumpers Other applicable jumper options Several other jumper options are available as illustratedWD drives Using the J1 auxiliary jumper block Terminating the drive ST19171W shown ST19171W Other option jumpers are available as illustrated below WC/DC drives Applicable jumper options Option jumpers are available as illustrated belowPage Page