On Mon, Mar 11, 2002, Heinz J . Mauelshagen wrote: > > I had two hard disks, the first with three VG's, the second > > with one VG (vg2). When the second hard disk started to fail, I > > installed a third with VG vg4 and copied the data over. Then, > > without deleting vg2, I unplugged hd 2. After reboot, the volume > > on vg2 mounted cleanly, although the disk was not available. It > > correctly accessed the LV on vg4 on the new disk. Is that correct? > > Can I now use either of the two vg2/vg4 to access the LV on the > > new disk? How do I get rid of one (and which) without risking my > > data? Can I just vgremove vg2 away? > > Gunther, > > the result depends on *how* you copied vg2 over to your new hard drive. > > If you used for eg. dd to do an image copy of the partitions, which contained > vg2 on the flaky drive or a whole disk copy keeping sizes, you've got duplicated > content and can unplug the flaky device. > If you ran vgscan, you saw your 'old' vg2 in the new drive, which is > perfectly fine. No, I used pvcreate, vgcreate, lvcreate to create vg4 and a LV on it. And than rsync to copy the data. That is why I am a bit confused by this behaviour. Should I reconnect hd2, then delete vg2 and disconnect hd2 again? > BTW: your configuration is a little bit extraordinary in terms of how to use > drives as PVs. Typically you shouldn't have multiple VG's on a single drive > as you seem to have it. > Much rather you should have multiple drives in one VG. Yes, I have one HD with two VG's. It might be unusual, but I can't see anything wrong with it. I do not intend to span a VG over more than one physical disk, because I don't want to have _part_ of a VG to fail. That's when it gets messy. I'm not saying it's impossible to recover, I just don't want to try. Besides, my HD size is large compared to my LV sizes, that's why I needn't bother. Gunther -- Dipl.-Ing. Gunther Kuhlmann gunther_kuhlmann@mentorg.com gunther-kuhlmann@easy-call.net Tel.: +49 (0)40 / 75 11 84 40 PGP: E6 BC 78 6B E6 09 C7 16 AB 5D 9A 9A D7 1C 01 FB -- _______________________________________________ linux-lvm mailing list linux-lvm@sistina.com http://lists.sistina.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html
