On 04/26/2012 07:23 PM, Brian McCullough wrote: >> You said you have missing PV, right? > > In the case of the machine in question, the original "disk" was found to > be too small by the user, and another qcow file was created to handle > the excess. > > Last Tuesday ( a week+ ago ), the primary Sysadmin for the host machine > rebooted the machine for various reasons, I understand, and afterward > this VM would not restart, with a missing PV. > > > >> - why the PV is missing? What exactly happened? >> (overwritten, removed from system, hw failed?) > > The qcow file is still there, but LVM claims that it is missing, from > what I understand from the messages. Are you sure that VM see that second qcow file content? I don't think so. It seems lvm is not your problem at all. I guess once you fix your VM configuration lvm will activate that without any data lost. Or is that qcow file corrupted? Check with lsblk (if available) and /dev/ that you _really_ physical device which was added later. If not, the question is what changed in your VM that after reboot it is not visible? Check log when starting VM - it must log that second qcow is used. Check log inside guest - which device were there (/dev/vdc?) and now missing... etc > unknown device eyeball lvm2 a- 40.00g 20.00g kXXFhn-oalZ-9D12-0CvG-6b4w-RjcE-Jb171k > LV VG Attr LSize Origin Snap% Move Log Copy% Convert Devices > home eyeball -wi--- 89.89g /dev/vdb2(2268) > home eyeball -wi--- 89.89g unknown device(0) >From this I guess 20GB of data missing on the end of home. quite a lot... >> All recovery now depends on info above and what you really want: >> >> 1) either you have old disk and you want to recover metadata on it >> and attach it back to VG >> >> 2) or you want just recover data from existing PVs >> (replace missing PV segments with zeroes for example) >> >> 3) or you want completely remove all LVs which were even partially on this >> lost PV (no data recovery, just make VG consistent again) >> >> What is the option you want to do? I guess 2) ? > > You are correct. Number 2 is my goal. With the info above I think you should try 1) first :) Milan _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
