[linux-lvm] BadBlocks. Need assistance.

[Anders Widman]

> Hi all,

> I have run in to trouble.
> I have 4 disks 3*76.34GB and 1*31.87GB setup as one vg(/dev/vg_pub/pub) 
> with ext3.

> One day, the performance went down radically, so i check the log seeing..
> Apr 13 13:59:56 fukke kernel: hdb: dma_intr: status=0x51 { DriveReady 
> SeekComplete Error }
> Apr 13 13:59:56 fukke kernel: hdb: dma_intr: error=0x40 { 
> UncorrectableError }, LBAsect=33063360, sector=33063360
> Apr 13 13:59:56 fukke kernel: end_request: I/O error, dev 03:40 (hdb), 
> sector 33063360
> Apr 13 13:59:58 fukke kernel: hdb: dma_intr: status=0x51 { DriveReady 
> SeekComplete Error }
> Apr 13 13:59:58 fukke kernel: hdb: dma_intr: error=0x40 { 
> UncorrectableError }, LBAsect=33063360, sector=33063360
> Apr 13 13:59:58 fukke kernel: end_request: I/O error, dev 03:40 (hdb), 
> sector 33063360

> continuous......with different sectors....

> I umount it and run fsck.ext3 -f -c -v /dev/vg_pub/pub
> e2fsch reports:(e2fsck 1.32 (09-Nov-2002))
> Pass 1: Checking inodes, blocks, and sizes
> Group 64's block bitmap (2097152) is bad.  Relocate<y>? yes

> Bad block 0 used as bad block indirect block?!?

> This inconsistency can not be fixed with e2fsck; to fix it, use
> dumpe2fs -b to dump out the bad block list and e2fsck -L filename
> to read it back in again.
> Continue<y>?

> doing as it says.
> dumpe2fs -b /dev/vg_pub/pub > ./badblocks.txt
> fsck.ext3 -f -c -v -L ./badblocks.txt /dev/vg_pub/pub
> ending up with the same suggestion, do a dumpe2fs -b and e2fsck -L filename.

> What will happend if i move the extend with pvmove to a new disk.
> e2fsck can't fix the disk AFAI tried or?

  You should use dd_rescue to move the data to a new (tested) disk. Then
  you  can  run  fsck  on  the  new disk safely. There is no need to run
  pvmove etc...

  Also,  test  all  your  drives with the IBM/Hitachi Drive Fitness Test
  before continuing. It is available from:

  http://www.hgst.com/hdd/support/download.htm

  //Anders


> Logical Volume Manager 1.0.7
> kernal 2.4.20 with LVM patch.

> grateful for help.

> regards,
> ::Beppe



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