changing first lock VG and PV

[Hrvoje Dubravica]

Hi,
I need to move cluster from one storage to
another. How to change first lock VG and PV.
Is it enough only change it in ascii file,
and cmcheckconf -C ascii.file and
cmapplyconf -C ascii, or maybe I need to do something else.
Thanks in advance,

Hrvoje

[Sanjay_6 · Accepted solution]

Hi,

If you change the cluster lock disk vg or path, modifying the same in the cluster ascii configuration file and applying the same should be okay.

Hope this helps.

Regds

[Christopher McCray_1]

You could change it manually, but doing a cmquerycl will let MCSG discover it for you. Of course, save the old cluster.ascii file as you will most likely want to save some of your old values, and the cluster must be down to perform this change.

Hope this helps
Chris

[Hrvoje Dubravica]

OK, but what happend with current First lock PV and VG. Should I deactivate it, or maybe even remove cluster flag by executing
vgchange -c n first_lock_vg
before any change ?
I remember that I had problems once before when
I tried to change first lock PV and VG.

Thanks,
Hrvoje

[melvyn burnard]

I would suggest you halt the cluster
vgchange -c n on the vg.
Do the changes including sharing of the VG etc, then either manually edit the ascii file, or do a cmquerycl to a new temporary file to ensure SG sees the new disc correctly.
Once happy with the changes, activate the vg to ensure it gets the cluster lock and id written to it, then do a cmapplyconf. I then recommend doing a vgcfgbackup of this vg, as this is the ONLY way to back up the fact that this is a cluster lock disc. If you do not do this step, and have to replace the disc in the future, then a vgcfgrestore will not be able to restore that information.

HTH