[CentOS] lvm

Peter Kjellstrom cap at nsc.liu.se
Wed Jun 13 06:13:20 UTC 2007


On Wednesday 13 June 2007, Shawn wrote:
> Hello,
>
> I have a physical volume with no volume group.
>
> # /sbin/pvscan -n
>   WARNING: only considering physical volumes in no volume group
>   PV /dev/sdg2         lvm2 [148.95 GB]
>   Total: 1 [148.95 GB] / in use: 0 [0   ] / in no VG: 1 [148.95 GB]
>
> Can I just create a volume group -- for example:
> # vgcreate my_volume_group /dev/sdg2

Yes, this how you create a _new_ volume group using a _unused_ physical 
volume. If, as you say below, you have data on this device then this is most 
likely _not_ what you want. Maybe you should look into vgimport/vgscan/etc.

/Peter

> and then activate it:
>
> # vgchange -a y my_volume_group
>
> I don't wish to reformat it or otherwise lose data stored on the volume
> if possible.
>
> Other suggestions?
>
> Shawn
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