[linux-lvm] Help - how do I recover a lost Volume Group
Alan.Chandler at logicacmg.com
Tue Apr 15 03:29:02 UTC 2003
I am not subscribed to this list - please CC me back again and to the copy
address (home and work).
I am in a mess, probably of my own making. I would like to get out of it.
In what I describe below, I will use /dev/hda etc although I have devfs
installed and really mean the full path to the devices.
My main disk /dev/hda has a non-lvm root partition (/dev/hda2) and one lvm
partition (/dev/hda3) [/dev/hda1 is a partition with another OS on it :-( ]
It was starting to fail so I have purchased another disk and temporarily
wired it in as /dev/hdb. I created three partitions on in with /dev/hdb3 as
the lvm partition. I successfully copied the first two partitions but with
the third, in order to preserve my volume group name (vg1), I did pvcreate
/dev/hdb3, vgextend vg1 /dev/hdb3 and pvmove /dev/hda3 so that all the data
should now be on /dev/hdb3.
I then shut down the machine, removed /dev/hda and moved what was /dev/hdb
so it is now /dev/hda. I booted up with my rescue CD and managed to run
lilo so /dev/hda2 now boots up as the correct rootfs.
Unfortunately when I run vgscan I am getting an error message something like
(I don't have the exact message - I am copying the from this lists archives)
vgscan -- ERROR "vg_read_with_pv_and_lv(): current PV" can't get data of
volume group "vg1" from physical volume(s)
I guess, I have left something behind on the old disk.
Is there a way out of this so I don't loose the data? I can wire up the
old disk again if necessary but I am not sure what I did wrong the first
time so I might be just wasting my time. So any help as to what to do would
be very welcome.
Alan.Chandler at LogicaCMG.com
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