Seagate Barracuda 36ES ST318417N, Product Manual

Page: 53 / 106

Barracuda 36ES Product Manual, Rev. H 43
8.1.2 Function description
J2
jumper
installation
Jumper function description
TE (Applies only to the N and W models)
On With the jumper installed, the onboard (non-removable) terminator circuits are enabled (con-
nected to the I/O lines).
Default is jumper installed.
Off Terminator circuits not enabled (not connected to I/O lines).
SE (Applies only to the LC and LW models)
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,
depending on the voltage state of the I/O “DIFFSNS” line.
Default is SE jumper not installed.
DS ME
Off Off Spindle starts immediately after power up— Default setting.
Off On Drive spindle does not start until Start Unit command received from host.
On Off Spindle Startup is delayed by SCSI ID times 12 seconds after power is applied, i.e., drive 0
spindle starts immediately when DC power connected, drive 1 starts after 12 second delay,
drive 2 starts after 24 second delay, etc.
On On Drive spindle starts when Start Unit command received from host. Delayed start feature is
overridden and does not apply when
ME jumper is installed.
WP
On Entire drive is write protected.
Off Drive is not write protected. Default is WP jumper not installed.
PD
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 is PD jumper not installed.
TP1 (Applies only to the LW, N and W models)
Off No terminator power is connected to SCSI bus I/O cable.
1
No jumpers on is factory default.
1. See Figure 18 for pins used for Termpower.
On Drive supplies power to SCSI bus I/O cable.
1
A jumper on the TP1 position may be needed to
power external terminators (see Section 9.8 and Figure 27).
TP2 (Applies only to the N and W models)
On Connects terminator power to the drive’s internal terminators
2
(for single-ended I/O only).
Default is jumper installed.
2. See Figure 19 for pins used for Termpower
Off No power is connected to the drives internal terminators.