LVM restore / recovery Post: 302249229

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Special Forums Hardware Filesystems, Disks and Memory LVM restore / recovery Post 302249229 by Zburatorul on Tuesday 21st of October 2008 12:50:14 AM

10-21-2008

Registered User

I've made some progress. Here's a summary of my steps so far:

# Searched for lvm config

Code:

sudo dd if=/dev/sdb bs=512 count=255 skip=1 of=/temp.txt

# Filtered the output, saved the file to /etc/lvm/backup/data-raid
# Extracted the UID of pv0 (/dev/md0) and ran

Code:

pvcreate -ff -v -u JgOakP-gVVs-SfhX-lEXi-x4fQ-3gXz-3d17FN /dev/md0

# Restored lvm w/

Code:

vgcfgrestore -f /etc/lvm/backup/data-raid data-raid

# Imported the volume group with

Code:

vgimport data-raid

# Brought it up

Code:

vgchange -ay data-raid

Code:

# ls -l /dev/mapper
total 0
crw-rw---- 1 root root  10, 60 2008-10-11 20:16 control
brw-rw---- 1 root disk 253,  7 2008-10-19 10:12 data--raid-user
brw-rw---- 1 root disk 253,  4 2008-10-19 10:12 data--raid-media
brw-rw---- 1 root disk 253,  3 2008-10-19 10:12 data--raid-media-real
brw-rw---- 1 root disk 253,  6 2008-10-19 10:12 data--raid-snap--media
brw-rw---- 1 root disk 253,  5 2008-10-19 10:12 data--raid-snap--media-cow

# Tried mounting w/ following fstab conf

Code:

/dev/mapper/data--raid-media    /media/Pictures    reiserfs    defaults,noatime    0    0

it failed with

Code:

[630884.179103] ReiserFS: dm-3: warning: sh-2021: reiserfs_fill_super: can not find reiserfs on dm-3

There are supposed to be 2 volumes with data, data--raid-media a ReiserFS partition, and data--raid-user a LUKS encrypted one and a snapshot volume of the media partition.

Any ideas what could have gone wrong?

Zburatorul

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vgextend

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

NAME

       vgextend - add physical volumes to a volume group

SYNOPSIS

       vgextend  [-A|--autobackup  y|n]  [-d|--debug]  [-h|-?|--help] [--restoremissing] [-f|--force] [-t|--test] [-v|--verbose] [ PHYSICAL DEVICE
       OPTIONS ] VolumeGroupName PhysicalDevicePath [PhysicalDevicePath...]

DESCRIPTION

       vgextend allows you to add one or more initialized physical volumes ( see pvcreate(8) ) to an existing volume group to extend it  in  size.
       Moreover,  it  allows  you to re-add a physical volume that has gone missing previously, due to a transient device failure, without re-ini-
       tialising it. Use vgextend --restoremissing to that effect.

       If PhysicalDevicePath was not previously configured for LVM with pvcreate (8), the device will be initialized with the same default  values
       used  with  pvcreate.  If non-default pvcreate values are are desired, they may be given on the commandline with the same options as pvcre-
       ate.  See PHYSICAL DEVICE OPTIONS for available options.  Note that the restore-related options such as --restorefile, --uuid, and --physi-
       calvolumesize are not available.  If a restore operation is needed, use pvcreate (8) and vgcfgrestore (8).

OPTIONS

       See lvm for common options.

PHYSICAL DEVICE OPTIONS

       The  following  options	are  available	for initializing physical devices in the volume group.	These options are further described in the
       pvcreate man page.

       -f, --force

       -y, --yes

       -Z, --zero y|n

       --labelsector sector

       --metadatasize size

       [--metadataignorey|n]

       --pvmetadatacopies copies

       --dataalignment alignment

       --dataalignmentoffset alignment_offset

Examples
       "vgextend vg00 /dev/sda4 /dev/sdn1" tries to extend the existing volume group "vg00"  by  the  new  physical  volumes  (see  pvcreate(8)  )
       "/dev/sdn1" and /dev/sda4".

SEE ALSO

       lvm(8), vgcreate(8), vgreduce(8), pvcreate(8)

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

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vgextend