Installation guide

Section 8.12:Diagnosing and Correcting Problems in a Cluster 139
Problem Symptom Solution
SCSI identification
numbers not unique
SCSI errors appear in the
log file
Each device on a SCSI bus must
have a unique identification number.
See Section A.5, SCSI Identification
Numbers for more information.
SCSI commands timing out
before completion
SCSI errors appear in the
log file
The prioritized arbitration
scheme on a SCSI bus can
result in low-priority devices
being locked out for some
period of time. This may cause
commands to time out, if a
low-priority storage device,
such as a disk, is unable to
win arbitration and complete a
command that a host has queued
to it. For some workloads, this
problem can be avoided by
assigning low-priority SCSI
identification numbers to the
host bus adapters.
See Section A.5, SCSI
Identification Numbers for
more information.