Ok, so I'm stupid and made a serious and grave mistake. On my linux box running Ubuntu 10.10, I have a 1.5TB RAID array that I had originally setup using the instructions located here: http://www.gagme.com/greg/linux/raid-lvm.php The RAID array is a 4 x 500GB RAID 5 array with an ext3 formatted filesystem and is not my boot device. The RAID array was just used for storage. The LVM setup is a single physical volume (the RAID device) and a single logical volume that makes up the entire physical volume.
So here is the list of steps that I ended up doing, based on the contents of the files in
/etc/lvm/archive (one file was created before each step, and the file lists what the command was):
lvremove /dev/raid_vg/lv0 lvcreate -l 357702 raid_vg -n lv0 lvremove raid_vg lvcreate -l 357702 raid_vg -n lv0 lvremove raid_vg vgexport raid_vg vgimport raid_vg vgscan lvremove raid_vg vgcreate raid_vg /dev/md1
So, I accidentally called
lvremove instead of
lvchange -a n Then I realized my mistake and tried to restore the logical volume. But that made the disk seem empty.
Now, I'm not sure, but I don't think the data was wiped (at least not all of it). I've cloned the device with
ddrescue just so I don't loose anything and can experiment on the image.
Now, my question is then, is it possible to restore the LVM information to the disk and get my filesystem back? I've got the configuration files in
/etc/lvm/archive which give me the start extents, sizes and extent counts.
Any help that anyone might be able to provide would be extremely appreciated. I was an idiot and screwed myself. I just hope that it was temporary and I can get my data back.