Replacing A Faulty Disk; Step 1: Identify The Faulty Disk - Lucent Technologies CentreVu Release 3 Version 8 Disk-Mirrored Systems User Manual

Maintaining Mirrored Systems

Replacing a faulty disk

Replacing a faulty disk
Step 1: Identify the
faulty disk
CentreVu CMS Release 3 Version 8 Disk-Mirrored Systems
This section explains how to replace a faulty disk. The system does not
need to be powered off or rebooted to perform this procedure.
A disk problem is usually indicated in the /var/adm/messages file. The
following lines, for example, indicate a disk problem:
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Jun 12 16:27:08 leopard unix: WARNING:
Jun 12 16:27:08 leopard unix: Error for command
'read(10)' Error Level: R
Jun 12 16:27:09 leopard unix: retryable
Jun 12 16:27:09 leopard unix: Requested Block 0,
Error Block: 0
Jun 12 16:27:09 leopard unix: Sense Key: Media Error
Jun 12 16:27:09 leopard unix: Vendor 'SEAGATE':
Jun 12 16:27:09 leopard unix: ASC = 0x31 (medium
format corrupted), ASCQ
= 0x0, FRU = 0x9
Jun 12 16:27:09 leopard unix: WARNING:
/sbus@3,0/SUNW,fas@3,8800000/sd@2,0
Those lines, however, do not tell us which disk has the problem. One way
of finding out is to enter an ls -l /dev/dsk/c* command and
search the output for a device description matching that in the warning
message. For example:
# ls -l /dev/dsk/c*
.
.
.
lrwxrwxrwx 1 root
/dev/dsk/c0t2d0s0 -> ../../devices/sbus@3,0/SUNW,fas
@3,8800000/sd@2,0:a
lrwxrwxrwx 1 root
/dev/dsk/c0t2d0s1 -> ../../devices/sbus@3,0/SUNW,fas
@3,8800000/sd@2,0:b
.
.
.
#
That the "/iommu@0...." information matches the same information in the
warning message indicates that disk c0t2d0 is the faulty disk.
root 50 Apr 24 15:21
root 50 Apr 24 15:21
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