How to mount an LVM volume? (was lvm2 problem)
Stuart Sears
stuart at sjsears.com
Tue Sep 23 14:30:15 UTC 2008
Gene Poole wrote:
>
> I'm not 100% sure that this will work, however it shouldn't hurt either...
>
> As root:
>
> mkdir /oldboot
> mount /dev/VolGroup00/LogVol01 /oldboot
>
> The file systems should now be available off of /oldboot
>
> If you want to make it available and mounted at boot time, update your
> fstab
>
> Hope this helps...
>
>> Good afternoon, Chris.
>>
>> My problem is related but not exactly the same. In my case I have
>> upgraded from FC5 to F9 by doing a fresh install on a new hard drive,
>> and I need to mount the old FC5 boot disk to copy some stuff off of it.
>>
>> "mount /dev/sdb2 /driveb" doesn't work for the reasons noted
>> (/dev/sdb2 is a container and not a volume).
>>
>> So, I said "lvm vgscan" and got:
>>
>> File descriptor 20 left open
>> Reading all physical volumes. This may take a while...
>> Found volume group "VolGroup00" using metadata type lvm2
>> Found volume group "VolGroup00" using metadata type lvm2
>>
>> Then I said "pvs" and got:
>>
>> File descriptor 20 left open
>> PV VG Fmt Attr PSize PFree
>> /dev/sda2 VolGroup00 lvm2 a- 111.59G 32.00M
>> /dev/sdb2 VolGroup00 lvm2 a- 76.22G 32.00M
>>
>> (Hope the formatting and column alignment on the above doesn't come
>> through all screwed up...)
>>
>> Apparently it thinks that both volumes are named VolGroup00 (instead
>> of ...00 and ...01) so things like lvm vgchange don't do any good
>> because it doesn't know which VolGroup00 to make available.
Only one of the volumegroups will currently be available, you can't have
2 conflicting /dev/VolGroup00 entries. That way lies madness.
Alternatively, remove one disk, boot F9 (or FC5, really doesn't matter
which!) with a rescue disc and rename the volumegroup.
vgrename /dev/VolGroup00 /dev/VolGroup-F9 (or something like that - man
vgrename).
(although in rescue mode, this would be lvm vgrename)
if you put the other disk back afterwards, the names will no longer clash
Regards,
Stuart
--
Stuart Sears RHCA etc.
"It's today!" said Piglet.
"My favourite day," said Pooh.
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