Corrupted Hard Drive Post: 302382023

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Operating Systems Linux Red Hat Corrupted Hard Drive Post 302382023 by fpmurphy on Monday 21st of December 2009 09:31:52 PM

12-21-2009

Registered User

The kernel panic is due to the nash script interpreter, which is part of initramfs ( switchroot, etc. are nash subcommands), being unable to mount the file systems.

Of more interest is the fact both logical volumes are not available according to the output from lvdisplay

Code:

...
LV Status NOT available
...

If the logical volumes are not available for some reason, then the filesystems on these logical volumes are not available, and thus cannot be mounted.

One possibility is that the LVM metadata is corrupt. LVM maintains the metadata backup in /etc/lvm/backup and /etc/lvm/archive, if you haven't turned off the auto backup feature of LVM. Try restoring the LVM metadata using vgcfgrestore. This should work if the damage to LVM metadata are minor. If the damage to LVM metadata is major, the disk will not be recognized. In such cases, you first need to restore the UUID for the missing device. To do so, compare the output of pvscan and cat /proc/partitions and paste the required UUID using the results of pvscan. You can then use vgcfgrestore to restore LVM metadata. If either of these methods work, make sure to fsck the filesystem(s) before mounting.

fpmurphy

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LEARN ABOUT DEBIAN

vgconvert

VGCONVERT(8)						      System Manager's Manual						      VGCONVERT(8)

NAME

       vgconvert - convert volume group metadata format

SYNOPSIS

       vgconvert  [-d|--debug] [-h|--help] [-t|--test] [-v|--verbose] [--labelsector] [-M|--metadatatypetype] [--pvmetadatacopies#copies] [--meta-
       datasizesize] [--version] VolumeGroupName [VolumeGroupName...]

DESCRIPTION

       vgconvert converts VolumeGroupName metadata from one format to another provided that the metadata fits into the same space.

OPTIONS

       See lvm(8) and pvcreate(8) for options.

EXAMPLE

       Convert volume group vg1 from LVM1 metadata format to the new LVM2 metadata format.

       vgconvert -M2 vg1

RECOVERY

       Use pvscan(8) to see which PVs lost their metadata.  Run pvcreate(8) with the --uuid and --restorefile options on each such PV to  reformat
       it  as  it  was, using the archive file that vgconvert(8) created at the start of the procedure.  Finally run vgcfgrestore(8) with that ar-
       chive file to restore the original metadata.

SEE ALSO

       lvm(8), pvcreate(8), vgcfgrestore(8)

Sistina Software UK					 LVM TOOLS 2.02.95(2) (2012-03-06)					      VGCONVERT(8)