[Linux-cluster] How to undo vgchange --clustered y?

[Bob Peterson]

----- Original Message -----
> Hi,
> I invoked `vgchange --clustered y [name]` and accepted the warning that
> the volume group might become inaccessible by mistaking inaccessible
> with unavailable for other cluster nodes. Since `clvm` doesn't work on
> Ubuntu 15.10 and building from source is
> painful<ref>http://askubuntu.com/questions/740615/how-to-get-clvmd-running-on-ubuntu-15-10</ref>
> I seem to have no chance to ever access the clustered volume group. Is
> there any solution to make the volume group accessible again?
> 
> -Kalle

Hi Kalle,

I had this problem once a long time ago.
I think what I did was: I exported the LUN on the SAN to a working
cluster with clvmd, and did vgchange -cn <volgrp> from there. You probably don't
have that option. You could try vgchange -fff, but I haven't tried it myself
so I don't know if it will work.

Regards,

Bob Peterson
Red Hat File Systems