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Top Forums UNIX for Advanced & Expert Users Grub - how to boot a copy of Linux (full system backup) Post 302765527 by Praveen_218 on Saturday 2nd of February 2013 02:31:25 PM
Old 02-02-2013
Its easy, a two step process.
You only need to edit grub.conf to add another boot option only for the vmlinux image you get into SystemBackup02/boot directory. Run 'install-grub /dev/<device holding SystemBackup02>'.

Hope both primary and backup machines have same architecture & device configurations!!!

A word of caution: It's a bit risky with little scope for mistakes; however don't assume that you are doomed on your mistake (until you delete your own data), if the backup system doesn't boot. You'll need to re-boot them again with a backup CD images and mount the drives temporarily and re-do the process correctly, BUT this time differently (mind that mounting may change paths). I've landed into mess and bounced back too but tensions run always high.
 

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

NAME
vgcfgrestore - restore volume group descriptor area SYNOPSIS
vgcfgrestore [-d|--debug] [-f|--file filename] [-l[l]|--list] [-h|--help] [-M|--Metadatatype1|2] [-t|--test] [-v|--verbose] VolumeGroupName DESCRIPTION
vgcfgrestore allows you to restore the metadata of VolumeGroupName from a text backup file produced by vgcfgbackup. You can specify a backup file with --file. If no backup file is specified, the most recent one is used. Use --list for a list of the available backup and archive files of VolumeGroupName. OPTIONS
-l | --list -- List files pertaining to VolumeGroupName List metadata backup and archive files pertaining to VolumeGroupName. May be used with the -f option. Does not restore Vol- umeGroupName. -f | --file filename -- Name of LVM metadata backup file Specifies a metadata backup or archive file to be used for restoring VolumeGroupName. Often this file has been created with vgcfg- backup. See lvm for common options. REPLACING PHYSICAL VOLUMES
vgdisplay --partial --verbose will show you the UUIDs and sizes of any PVs that are no longer present. If a PV in the VG is lost and you wish to substitute another of the same size, use pvcreate --restorefile filename --uuid uuid (plus additional arguments as appropriate) to initialise it with the same UUID as the missing PV. Repeat for all other missing PVs in the VG. Then use vgcfgrestore --file filename to restore the volume group's metadata. SEE ALSO
lvm(8), vgcreate(8) Sistina Software UK LVM TOOLS 2.02.95(2) (2012-03-06) VGCFGRESTORE(8)
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