Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
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37
Notes for Figure 10.1-1:
[1] Notes explaining the functions of the various jumpers on jumper header connectors J2, J5 and J6 are
given below in left to right order of jumper position. The term “default” means as standard OEM units are
configured when shipped from factory. “Off” means no jumper is installed; “On” means a jumper is
installed. Off or on underlined is factory default condition.
J2
Jumper
Installation Jumper Function Description
RES
Off/On Reserved. Default is no jumper 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 proteccted. Default is no WP jumper installed.
PE
On Parity checking and parity error reporting by the drive is enabled.
Off Drive does not report result of parity checking to host. Default is no PE jumper installed.
RES
Off/On Reserved for factory use only. Default is no jumper installed.
TP TP
Off Off No terminator power is connected to drive terminators or SCSI bus I/O pin 26.
On Off Drive supplies its own teminator power only. Jumper on this position is factory default.
Off On Drive supplies power to I/O pin 26 of SCSI bus; none to internal terminators. When drives
have differential I/O circuits, a jumper on the right TP position may be needed to power
external terminators (see system documentation). The ST11200ND drive has differential
I/O circuits which have no terminator circuits on the drive.
On On Drive supplies terminator power to itself (internal connection) and to I/O pin 26 of SCSI bus.
This is a legal jumper setting.
TP Position A
On This horizontally positioned jumper across the two TP positions nearest PCB edge, con-
nects terminator power from SCSI bus I/O pin 26 to the drive’s internal terminators (for
single-ended I/O only).
Off See above explanations for TP jumpers.
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