On 01/19/2012 07:56 AM, Muhammad Panji wrote: > Dear All, > I have one VG with one LV inside consist of four disk (and four PV) somehow > the UUID is changed. I try to restore with the last known good > configuration and use > > pvcreate --uuid xxx --restorefile xxx > > but I think when I first time do it I did use wrong UUID for two device. > but haven't only using command above and haven't used vgcfgrestore. After > carefully read the configuration, using hdparm to know device serial number > I think I have assign the right UUID for each device. I succesfully use > vgcfgrestore, but I cannot mount the device (unknown filesystem, bad > superblock, etc). My questions are, is my first attempt to assigning > (wrong) UUID make all the LVM corrupt? I see that all LE and PE is still > there, the VG and LV size is right but still I cannot mount the volume. Is > this just a bad filesystem or the data really gone? Thank you. > Regards, > > > > > > Hi, Why theses 4 PV lost UUID? Have some hardware change ? It's not common this happen, just lost LVM Meta Data on PV, something wrong happened. The problem is reconstruct meta information about Mapping of blocks ( PE ) to LV, if your LV used blocks mapped across the four disk, I recommend you running check file system.. e2fsck to repair. Well if e2fsck don't solve this problem, it time find out the last backup. :( best regards, --aslan