On Dec 28, 2019, at 3:11 AM, Utpal Bora <cs14mtech11017@xxxxxxxxxx> wrote: > > Hi, > > My XFS home drive is corrupt after trying to extend it with lvm. > This is what I did to extend the partition. > 1. Extend Volume group to use a new physical volume of around 1.2TB. > This was successful without any error. > vgextend vg-1 /dev/sdc1 > > 2. Extend logical volume (home-lv) to use the free space. > lvextend -l 100%FREE /dev/mapper/vg--1-home--lv -r > This probably invoked xfs_growfs > 3. Resized home-lv and reduce 55 GB > lvreduce -L 55G /dev/mapper/vg--1-home--lv -r > XFS cannot shrink. This corrupted your filesystem by truncating the block device. > I assumed that -r will invoke xfs_grow internally. > Everything was working fine until the server was restarted. > After restart, the home volume is not mounting. Please see the following. > > server% sudo mount -t xfs /dev/mapper/vg--1-home--lv /home > mount: /home: can't read superblock on /dev/mapper/vg--1-home--lv. > > server% dmesg| tail > [162580.208796] attempt to access beyond end of device > [162580.208800] dm-3: rw=4096, want=6650552320, limit=6640066560 > [162580.208805] XFS (dm-3): last sector read failed Because you chopped off 55g from the end. > server% sudo xfs_repair -n Repair cannot read blocks that have been removed from the filesystem. > /dev/mapper/vg--1-home--lv > Phase 1 - find and verify superblock... > xfs_repair: error - read only 0 of 512 bytes Failed to read a backup super beyond the end of the reduced lv. Grow the lv back to 100% I.e. the size before the lvreduce and it’ll probably be ok again -Eric > OS: Ubuntu Server 18.04.3 > Kernel: 4.15.0-72-generic > > I have gone through the earlier posts on this subject. They did not help me. > > Is it possible to repair the XFS volume? Kindly suggest. > > Regards, > > Utpal Bora > Ph.D. Scholar > Computer Science & Engineering > IIT Hyderabad >
