Disk Failure

[Bona_1]

Hello All,
I have an RP 7410 with a failed mirror disk. I want to replace the failed disk, and I want to know if there are any commands i need to type before I replace the disk? The way i see it, since the disk is failed, I don't need to unmount the file systems anyway, all i need to do is switch the disk, restore (vgcfgrestore) and re-sync. Please advice.

[Rajeev Shukla]

Yes, since the LV's on the disks are already mirrored, there is no need to unmount any filesystems as the system would still be running.
Just replace the disk with a new one, do a vgcfgrestore on the new disk, that should re-sync all mirrors and if not do a vgsync

[PVR]

Hi

Replace the disk. No need to unmount filesystems
Do #pvcreate /dev/rdsk/cXtXdX

#vgcfgrestore vgname /dev/dsk/cXtXdX
#vgsync /dev/vgname

[Hazem Mahmoud_3]

So I have a question, how do you know which vgname to use with vgcfgrestore and vgsync since there can be several vg's on a physical volume? Do you do it for all vg's that exist on that disk? Thanks!

-Hazem

[Mourad Derriche]

Hi

Yes, you would definately have to issue vgsync for each volume group that it is associated with.

The procedure is as follows.

pvcreate /dev/rdsk/
vgcfgrestore /dev/ /dev/rdsk/
vgsync /dev/

Issue vgsync for each volumegroup the disk is a member of.

Remember that if the disk is a bootdevice you will need to add '-B' to pvcreate, and reapply the LIF area.

[Rajeev Shukla]

Hi Friends,
Let me correct you, a disk can belong to only one VG, so how can you say there can be many VG assocaited with a particular PV?
And by the way you can even re-activate the VG and that will start the VG syncing.