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Maintaining Mirrored Systems CentreVu CMS Release 3 Version 8 Disk-Mirrored Systems
Replacing a faulty disk 72
Step 4: Remove
state database
replicas (boot disks
only)
3
When you replace a boot disk, you must remove the state database
replicas from the old disk and recreate them on the new one. A boot disk
is one that is a member of metadevice d11 or d12 (see “Step 2: Identify
the submirrors” on page 70).
If you fail to remove old replicas, the software will have an
inaccurate picture of the replicas existing on your system and will
attempt to write to nonexistent database replica files.Match up the
device description lines to determine which disk drive has
problems.
In general, the procedure is a three-step process:
1. Issue a
metadb -i
command to find out which replicas to
remove.
2. Issue a
metadb -d
command to do the actual deletion.
3. Issue another
metadb -i
command to verify the deletion.
If the faulty disk were c0t1d0, for example, the replica deletion might
resemble the following series of commands and responses:
Step 5: Replace the
faulty disk drive
3
1. Remove the faulty disk drive.
2. Install the new disk drive into the same slot the faulty drive came out
of. For installation instructions, see the documentation that came
with the disk drive or the Lucent hardware installation manual.
3. Partition the new disk using the
format
command. See
“Partitioning disks with the format command” on page 76
. Make
sure you partition the new disk drive!
# metadb -i
flags first blk block count
a m p luo 16 1034 /dev/dsk/c0t0d0s1
a p luo 1050 1034 /dev/dsk/c0t0d0s1
a p luo 2084 1034 /dev/dsk/c0t0d0s1
a p luo 3118 1034 /dev/dsk/c0t0d0s1
a p luo 16 1034 /dev/dsk/c1t4d0s1
a p luo 1050 1034 /dev/dsk/c1t4d0s1
a p luo 2084 1034 /dev/dsk/c1t4d0s1
# metadb -d c1t4d0s1
# metadb -i
flags first blk block count
a m p luo 16 1034 /dev/dsk/c0t0d0s1
a p luo 1050 1034 /dev/dsk/c0t0d0s1
a p luo 2084 1034 /dev/dsk/c0t0d0s1
a p luo 3118 1034 /dev/dsk/c0t0d0s1