How to recover data from a partial crashed logical volume

[Stig Eriksson]

Hi gurus
I have a data logical volume (/dev/vg01/lvol1)
that spans over two different physical disks.
Last night one of the disks went down, and
now my data volume /dev/vg01/lvol1 is
unavailable. The two disks used were c0t5d0
and c0t0d0. The disk c0t0d0 has crashed...

Is there any way to recover files (or part of
files) from the healthy disk c0t5d0?

Best Regards
Stig Eriksson
Cactus Automation AB
Sweden
se@cactus.se

[harry d brown jr]

Not usually, but it really depends upon you set up the logical volume. Did you use extent based striping? Did you use HP striping?

What is the output from a lvdisplay -v /dev/vg01/lvol1 ??


live free or die
harry

[Frank Slootweg · Accepted solution]

If vxfs/JFS, *try*:

mount -r -F vxfs

If HFS, *try*:

mount -f -F hfs

If you are lucky, this will mount the LV and you will be able to access part of your data and back it up as soon as possible.

[David Navarro]

Hi.
You can replace crashed disk, then vgcfgrestore to that disk. Then probably you will need a fsck and results will be unpredictable.

I think that is the only think you can do. Except recover from a backup.

Consider to install a disk mirror....

Best luck..