copying lvm with the same name
Aldo Foot
lunixer at gmail.com
Tue Mar 17 17:45:28 UTC 2009
On Mon, Mar 16, 2009 at 8:28 PM, Frank Cox <theatre at sasktel.net> wrote:
> One of my computers died and, of course, there is un-backed-up data on there
> that I want to recover if I can. The hard drive seems to be in good shape so I
> took it out of the dead box and installed it on this computer (my main desktop
> machine.)
>
> I have been doing a bunch of reading about logical volumes and some of what
> I've found is self-contradictory, incomplete and stuff that I just don't
> really understand (yet.) And, as you can imagine, since this is my main
> desktop machine I'm not terribly anxious to just start playing around with
> the lvm configuration without knowing what I'm doing.
>
> Here are my findings so far:
>
> [root at mutt ~]# pvscan
> PV /dev/sdb2 VG VolGroup00 lvm2 [279.25 GB / 32.00 MB free]
> PV /dev/sda2 VG VolGroup00 lvm2 [465.56 GB / 32.00 MB free]
> Total: 2 [744.81 GB] / in use: 2 [744.81 GB] / in no VG: 0 [0 ]
> [root at mutt ~]# lvscan
> ACTIVE '/dev/VolGroup00/LogVol00' [277.28 GB] inherit
> ACTIVE '/dev/VolGroup00/LogVol01' [1.94 GB] inherit
>
> It looks like the machine can see the second drive and the lvm that's on it
> /dev/sdb2, but it has the same VolGroup name as /dev/sda2.
>
> What I would like to do is twofold: First, and most importantly, I would like
> to mount it as-is so I can copy my data off of there. Second, I would like to
> re-format it and add it to the storage capacity that I already have on this
> machine. Heck, if it's still a good drive I might as well put it to use.
>
> So, how can I mount VolGroup00 that's on /dev/sdb2? The vgchange command
> followed by a simple mount command looks like what I want to do, but what's the
> syntax? As I said, I really don't want to bugger up my primary hard drive....
>
> --
> MELVILLE THEATRE ~ Melville Sask ~ http://www.melvilletheatre.com
__
Get info on the Volume Group (change 00 to 01 for the other volume)
vgdisplay -v VolGroup00
Look at the Physical Volumes list; the hard drive partitions
are shown individually. That's how you identify with hard
drive or partition belongs to what Volume Group.
Somewhere in the Logical Volume info it will say:
"LV Status available"
To fix inconsistencies, check the filesystem
e2fsck -fvy /dev/VolGroup00/LogVol00
To format (make sure to pick the correct one)
mkfs.ext3 /dev/VolGroup00/LogVol00
mount as any other filesystem
mount /dev/VolGroup00/LogVol00 /mnt/mountpoint
Bottom line is you can use /dev/VolGroup00/LogVol00 as you
would any hard drive device name such as /dev/hda1.
HTH,
~af
More information about the fedora-list
mailing list