LVM configuration

[Cesare Di Pietro_1]

I had the vg00 whith 2 disk mirrored, one disk is been substituted and when the new disk has been insered i have this segnalation when i exec the command vgcfgbackup:
"vgcfgbackup /dev/vg00
vgcfgbackup: /etc/lvmtab is out of date with the running kernel:Kernel indicates 3 disks for "/dev/vg00"; /etc/lvmtab has 2 disks.
Cannot proceed with backup."

What can I do to realigned the configuration?

Thanks

[Steven E. Protter · Accepted solution]

Ideally,

put the replaced disk back

break the mirror.

vgreduce the second disk out of the volume group.

save lvm configuration

make the disk switch.

re-mirror.

What you need to do if you want this new disk in the volume group is extend the volume group to include the new disk.

You may need this little procedure.

cd /etc
mv lvmtab lvmtab.old

vgscan -a

vgreduce -f

follow the instructions this command displayes exactly.

SEP

[Henk Geurts]

you confused the vgcfgbackup with vgcfgrestore:


when you have replaced a root disk with mirror:

vgcfgrestore -n /dev/vg00 /dev/rdsk/cxtxdx
vgchange -a y /dev/vg00
vgsync /dev/vg00 (if nesseseary)
mkboot /dev/rdsk/cxtxdx
mkboot -a "hpux -lq" /dev/rdsk/cxtxdx

regards

[Pete Randall]

Henk has pointed you in the right direction - you certainly don't need to rebuild your mirrors from scratch. That's the whole point of having mirrors in the first place: to recover from disk failures.


Pete

[Cesare Di Pietro_1]

Thanks.