Hello,
I'm trying to salvage data from a desktop IDE disk which went sour
during a Windows XP re-installation on one of its partitions (the rest
was Ubunut 8.04 with LVM).
I put that IDE disk into an IDE->USB enclosure and ran ddrescue on it.
It complaint a lot but for now I just want to see if I manage to read
whatever is possible at the LVM level.
"fdisk -l" on the image file complains about not finding geometry and
therefore difference in logical/physical partition size in table:
Disk sdd: 0 MB, 0 bytes
255 heads, 63 sectors/track, 0 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x00096ee7
Device Boot Start End Blocks Id System
sdd2 12030 24190 97683232+ 8e Linux LVM
Partition 2 has different physical/logical beginnings (non-Linux?):
phys=(1023, 0, 1) logical=(12029, 0, 1)
Partition 2 has different physical/logical endings:
phys=(1023, 254, 63) logical=(24189, 254, 63)
sdd3 24191 24321 1052257+ 83 Linux
Partition 3 has different physical/logical beginnings (non-Linux?):
phys=(1023, 0, 1) logical=(24190, 0, 1)
Partition 3 has different physical/logical endings:
phys=(1023, 254, 63) logical=(24320, 254, 63)
If I give it a "number of cylinders" it doesn't complain:
fdisk -C 24321 -l sdd
Disk sdd: 0 MB, 0 bytes
255 heads, 63 sectors/track, 24321 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x00096ee7
Device Boot Start End Blocks Id System
sdd2 12030 24190 97683232+ 8e Linux LVM
sdd3 24191 24321 1052257+ 83 Linux
(I deleted the windows partition on the image file).
But kpartx/pvscan still complains a lot when I try to add this image:
# kpartx -a -v "`pwd`/sdd"
gpt: 0 slices
dos: 4 slices
device-mapper: reload ioctl failed: Invalid argument
add map loop0p2 (0:0): 0 195366465 linear /dev/loop0 193245885
device-mapper: reload ioctl failed: Invalid argument
add map loop0p3 (0:0): 0 2104515 linear /dev/loop0 388612350
# pvscan
/dev/pictonvg/swaplv: read failed after 0 of 4096 at 536805376:
Input/output error
/dev/pictonvg/swaplv: read failed after 0 of 4096 at 0: Input/output error
/dev/pictonvg/rootlv: read failed after 0 of 4096 at 10737352704:
Input/output error
/dev/pictonvg/rootlv: read failed after 0 of 4096 at 0: Input/output error
/dev/pictonvg/homelv: read failed after 0 of 4096 at 88747212800:
Input/output error
/dev/pictonvg/homelv: read failed after 0 of 4096 at 0: Input/output error
/dev/sdd1: read failed after 0 of 2048 at 0: Input/output error
PV /dev/sdd2 VG pictonvg lvm2 [93.16 GB / 4.00 MB free]
PV /dev/sda5 VG wanaka lvm2 [278.47 GB / 7.97 GB free]
Total: 2 [371.62 GB] / in use: 2 [371.62 GB] / in no VG: 0 [0 ]
And I can't access these volumes:
# e2fsck /dev/pictonvg/homelv
e2fsck 1.40.8 (13-Mar-2008)
e2fsck: Attempt to read block from filesystem resulted in short read
while trying to open /dev/pictonvg/homelv
Could this be a zero-length partition?
What can I do in order to access the volumes on the image file?
Thanks,
--Amos
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