Seagate ST373454 Manual download pdf (Page 51)

Cheetah 15K.3 SCSI Product Manual, Rev. G 41

8.1.2 Function description

Note. J2 does not exist on the LC model and is supported on the LW model only.

jumper

installation Jumper function description

On Forces drive to use single-ended I/O drivers/receivers only.

Off

Drive can operate on the interface in low voltage differential mode or single-ended, depend-

ing on the voltage state of the I/O “DIFFSNS” line. Default.

DS ME

Off

Off Spindle starts immediately after power up. Default.

Off On Drive spindle does not start until the Start Unit command received from the host.

On Off Spindle startup is delayed by the SCSI ID times 12 seconds after power is applied, i.e., the

drive assigned SCSI ID 0 spindle starts immediately when DC power is connected, a drive

assigned SCSI ID 1 starts after 12-second delay, and a drive assigned SCSI ID 2 starts after

24-second delay, etc.

On On Drive spindle starts when the Start Unit command is received from the host. The Delayed

Start feature is overridden and does not apply when the ME jumper is installed.

On Entire drive is write protected.

Off

Drive is not write protected. Default.

On Parity checking and parity error reporting by the drive is disabled.

Off

Drive checks for parity and reports result of parity checking to host. Default.

Off

No connection. Default.

Off The drive does not supply terminator power to external terminators or to the SCSI bus I/O

cable.

On Drive supplies power to SCSI bus I/O cable. When drives have differential I/O circuits, a

jumper on the TP1 position may be needed to power external terminators (see system docu-

mentation). These drives do not have terminator circuits on the drive.

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Seagate ST373454 Manual Page 51