Active Termination - Gateway ALR 8200R User Manual

Note:
Each drive should have a
drive number label affixed
to the front of it. The drive
number on the label should
correspond to the SCSI ID
of the device.
60 Gateway ALR 8200R User's Guide
SCSI ID Address Settings
Up to fifteen devices can be connected to a single SCSI channel. Each
SCSI device is assigned a SCSI ID number (address). The active backplane
of the RAID bay allows the user to assign SCSI ID numbers for each of the
drives installed, based on the jumper settings of JP7 and JP11. Drives
should be installed in the lowest available drive bay. Refer to Table 4 for
specific jumper settings. SCSI ID's are assigned from each drive's position
in the RAID bay (from lowest to highest).
Table 4: SCSI ID Selection Jumpers

Active Termination

Every SCSI subsystem must be terminated at both ends for proper
operation. Refer to the documentation supplied with your controller for
instructions on how to properly terminate your controller. Terminate the
other end of the SCSI subsystem by setting JP8, and/or JP3 on the RAID
Cage backplane. These jumpers provide active termination on the SCSI
bus. JP6 provides termination power for the 8-bit, 50-pin connector at the
top to the RAID cage and JP3 provides active termination for the 16-bit, 68-
pin Ultra2 Wide SCSI connector. Active termination is enabled by
removing the jumper from JP6 (Standard SCSI) or JP3 (Ultra Wide SCSI).
Termination power is provided by JP10. To enable termination power,
jumper pins 1 and 2 of JP10. To disable termination power, jumper pins 2
and 3 of JP10.