System information

2-12
AlphaServer 800 Service Guide
Table 2-3 Mass Storage Problems (continued)
Symptom Problem Corrective Action
Drives are missing
from the show
config display/One
drive appears seven
times on the show
config display.
Drive SCSI ID set
to 7 (reserved for
host ID)
or
Duplicate host IDs
on a shared bus.
Correct SCSI IDs.
or
Change host ID by setting the
pk*0_host_id environment variable
(set pk*0_host_id) through the
SRM console.
LEDs do not come
on. Drive missing
from the show
config display.
Missing or loose
cables.
Drives not properly
seated on the hard
disk backplane.
Remove device and inspect cable
connections.
Reseat drive.
Drives disappear
intermittently from
the show config
and show device
displays.
SCSI bus length
exceeded.
The entire SCSI bus length, from
terminator to terminator, must not
exceed 6 meters for fast double-
ended SCSI-2, or 3 meters for fast
single-ended SCSI-2.