Hi, Two days ago, I had a power cut (only one second, but...) on my Debian server and, when it restarted, it could not mount LVM volumes... I have a boot partition and all the other ressources are on LVM. I've booted on a live CD and it seems that my fourth disk had lost its partition table. With some tools, I think I have restored the partition table (but I'm not sure). I used : sfdisk /dev/sdd < backup_sfdisk It seems OK except I have "Disk identifier: 0x00000000". Here are the results of some commands : # fdisk Disk /dev/sda: 400.0 GB, 400088457216 bytes 255 heads, 63 sectors/track, 48641 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0x0009efa1 Device Boot Start End Blocks Id System /dev/sda1 * 1 30 240943+ 83 Linux /dev/sda2 31 48641 390467857+ 5 Extended /dev/sda5 31 48641 390467826 8e Linux LVM Disk /dev/sdb: 400.0 GB, 400088457216 bytes 255 heads, 63 sectors/track, 48641 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0xace22e9e Device Boot Start End Blocks Id System /dev/sdb1 1 48641 390708801 5 Extended /dev/sdb5 1 48641 390708769+ 8e Linux LVM Disk /dev/sdc: 400.0 GB, 400088457216 bytes 255 heads, 63 sectors/track, 48641 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0xcfcecfce Device Boot Start End Blocks Id System /dev/sdc1 1 48641 390708801 5 Extended /dev/sdc5 1 48641 390708769+ 8e Linux LVM Disk /dev/sdd: 640.1 GB, 640135028736 bytes 255 heads, 63 sectors/track, 77825 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sdd1 1 77825 625129281 5 Extended /dev/sdd5 1 77825 625129249+ 8e Linux LVM # pvdisplay --- Physical volume --- PV Name /dev/sda5 VG Name VG_Wilco PV Size 372.38 GB / not usable 4.24 MB Allocatable yes (but full) PE Size (KByte) 4096 Total PE 95328 Free PE 0 Allocated PE 95328 PV UUID dyVLCp-3kAD-wneq-VxVh-Nyr5-q6mn-wf6kjT --- Physical volume --- PV Name /dev/sdb5 VG Name VG_Wilco PV Size 372.61 GB / not usable 3.53 MB Allocatable yes (but full) PE Size (KByte) 4096 Total PE 95387 Free PE 0 Allocated PE 95387 PV UUID ZEmHeZ-0DnH-VsvK-m9ju-7fdd-z2UH-5kTp4X --- Physical volume --- PV Name /dev/sdc5 VG Name VG_Wilco PV Size 372.61 GB / not usable 3.53 MB Allocatable yes (but full) PE Size (KByte) 4096 Total PE 95387 Free PE 0 Allocated PE 95387 PV UUID kgMwfG-ugM6-dFeK-8358-EoZO-RuIJ-S0FqVv --- Physical volume --- PV Name unknown device VG Name VG_Wilco PV Size 596.17 GB / not usable 344.00 KB Allocatable yes (but full) PE Size (KByte) 4096 Total PE 152620 Free PE 0 Allocated PE 152620 PV UUID U3KSpz-6Yf6-QX03-erXL-AnPg-qxF9-1TTFXM # pvscan PV /dev/sda5 VG VG_Wilco lvm2 [372.38 GB / 0 free] PV /dev/sdb5 VG VG_Wilco lvm2 [372.61 GB / 0 free] PV /dev/sdc5 VG VG_Wilco lvm2 [372.61 GB / 0 free] PV unknown device VG VG_Wilco lvm2 [596.17 GB / 0 free] Total: 4 [1.67 TB] / in use: 4 [1.67 TB] / in no VG: 0 [0 ] # vgscan Reading all physical volumes. This may take a while... Found volume group "VG_Wilco" using metadata type lvm2 I've modified /etc/lvm/backup/VG_Wilco to put /dev/sdd5 instead of "unknown device" and then, I've tried : # vgcfgrestore /etc/lvm/backup/VG_Wilco VG_Wilco Could not find device with uuid "U3KSpz-6Yf6-QX03-erXL-AnPg-qxF9-1TTFXM" Segmentation fault Do you know if I can hope to restore my data ? Do you have any clue ? Thank you. David. _______________________________________________ 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/
