[linux-lvm] Logical Volume on two disk, one is broken: how to restore data from the good disk?

[Heinz Mauelshagen]

On Tue, Jul 10, 2007 at 04:31:51PM +0200, Marco Antonelli wrote:
> Hello,
> I have one LV (/home/hom_vg/home_lv) spanning over two PV. The PVs
> were created on /dev/hdc1 and /dev/hdd1, both covering the entire
> disks hdc (120 gb) and hdd (200 gb) respectively.
> The mapping is linear.
> 
> My hdc is physically damaged... I could not even run fsck, badblocks
> and dd_rescue. All of them give an output like this (from dmesg):

You got to put the PVs on MD RAID >= 1 or use LVM mirring to avoid this.
Reach out for your backups :(

Regards,
Heinz    -- The LVM Guy --

> 
> 
> hdc: dma_intr: status=0x51 { DriveReady SeekComplete Error }
> hdc: dma_intr: error=0x40 { UncorrectableError }, LBAsect=512, high=0,
> low=512, sector=512
> ide: failed opcode was: unknown
> end_request: I/O error, dev hdc, sector 512
> Buffer I/O error on device hdc, logical block 64
> hdc: dma_intr: status=0x51 { DriveReady SeekComplete Error }
> hdc: dma_intr: error=0x40 { UncorrectableError }, LBAsect=512, high=0,
> low=512, sector=512
> ide: failed opcode was: unknown
> end_request: I/O error, dev hdc, sector 512
> Buffer I/O error on device hdc, logical block 64
> Adding 690784k swap on /dev/hda4.  Priority:-1 extents:1 across:690784k
> EXT3 FS on hda3, internal journal
> hdc: dma_intr: status=0x51 { DriveReady SeekComplete Error }
> hdc: dma_intr: error=0x40 { UncorrectableError }, LBAsect=447, high=0,
> low=447, sector=447
> ide: failed opcode was: unknown
> end_request: I/O error, dev hdc, sector 447
> Buffer I/O error on device dm-0, logical block 0
> hdc: dma_intr: status=0x51 { DriveReady SeekComplete Error }
> hdc: dma_intr: error=0x40 { UncorrectableError }, LBAsect=455, high=0,
> low=455, sector=455
> ide: failed opcode was: unknown
> end_request: I/O error, dev hdc, sector 455
> Buffer I/O error on device dm-0, logical block 1
> hdc: dma_intr: status=0x51 { DriveReady SeekComplete Error }
> hdc: dma_intr: error=0x40 { UncorrectableError }, LBAsect=463, high=0,
> low=463, sector=463
> ide: failed opcode was: unknown
> end_request: I/O error, dev hdc, sector 463
> Buffer I/O error on device dm-0, logical block 2
> hdc: dma_intr: status=0x51 { DriveReady SeekComplete Error }
> hdc: dma_intr: error=0x40 { UncorrectableError }, LBAsect=471, high=0,
> low=471, sector=471
> ide: failed opcode was: unknown
> end_request: I/O error, dev hdc, sector 471
> Buffer I/O error on device dm-0, logical block 3
> hdc: dma_intr: status=0x51 { DriveReady SeekComplete Error }
> hdc: dma_intr: error=0x40 { UncorrectableError }, LBAsect=447, high=0,
> low=447, sector=447
> ide: failed opcode was: unknown
> end_request: I/O error, dev hdc, sector 447
> Buffer I/O error on device dm-0, logical block 0
> fuse init (API version 7.8)
> kjournald starting.  Commit interval 5 seconds
> EXT3 FS on hda2, internal journal
> EXT3-fs: mounted filesystem with ordered data mode.
> hdc: dma_intr: status=0x51 { DriveReady SeekComplete Error }
> hdc: dma_intr: error=0x40 { UncorrectableError }, LBAsect=449, high=0,
> low=449, sector=449
> ide: failed opcode was: unknown
> end_request: I/O error, dev hdc, sector 449
> EXT3-fs: unable to read superblock
> 
> _______________________________________________
> linux-lvm mailing list
> linux-lvm at redhat.com
> https://www.redhat.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/

*** Software bugs are stupid.
    Nevertheless it needs not so stupid people to solve them ***

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Heinz Mauelshagen                                 Red Hat GmbH
Consulting Development Engineer                   Am Sonnenhang 11
Storage Development                               56242 Marienrachdorf
                                                  Germany
Mauelshagen at RedHat.com                            PHONE +49  171 7803392
                                                  FAX   +49 2626 924446
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