Backing Up Md Devices; Saving The Volume Structure Information - ACRONIS BACKUP AND RECOVERY 10 SERVER FOR LINUX - UPDATE 3 User Manual


When recovering a logical volume over a basic (MBR) disk or volume. You can resize the
resulting volume in this case.
A system, recovered from a logical volume backup to a basic MBR disk, cannot boot because its kernel
tries to mount the root file system at the logical volume. To boot the system, change the loader
configuration and /etc/fstab so that LVM is not used and reactivate your boot loader (p. 136).

When recovering a basic or logical volume to a previously created logical volume. Such is the
case when you create the structure of logical volumes manually by using the lvm utility.

Recovering both the structure of logical volumes and their contents.
Such is the case when recovering on bare metal or on a machine with different volume structure.
The structure of logical volumes can be automatically created at the time of recovery, if it has
been saved in the backup (p. 33).
This option is available only under bootable media.
For detailed instructions on how to recover logical volumes, see Recovering MD devices and logical
volumes (p. 162).
Helpful link:

http://tldp.org/HOWTO/LVM-HOWTO/
2.8.2

Backing up MD devices

MD devices combine several volumes and make solid block devices (/dev/md0, /dev/md1, ...,
/dev/md31). The information about MD devices is stored in /etc/raidtab or in dedicated areas of
those volumes.
You can back up active (mounted) MD devices in the same way as logical volumes. The MD devices
appear at the end of the list of volumes available for backup.
Backing up volumes included in MD devices does not make sense when an MD device is mounted, as
it won't be possible to recover them.
When recovering MD devices under bootable media, the structure of MD devices can be
automatically created if it has been saved in the backup (p. 33). For detailed information about
recovering MD devices under bootable media, see Recovering MD devices and logical volumes (p.
162).
For information about assembling MD devices when performing recovery in Linux, see Assembling
MD devices for recovery (Linux) (p. 134).
2.8.3

Saving the volume structure information

For the structure of MD devices and logical volumes to be automatically created at the time of
recovery, you need to save the volume structure information in either of these ways:
 When creating a backup plan for the disk-level backup, go to Backup options > Advanced
settings, and then select the Save software RAID and LVM metadata along with backups check
box. (It is selected by default.)

Before performing the first disk backup on a source machine, run the following command:
trueimagecmd --dumpraidinfo
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