How the automatic mapping works

Acronis Backup automatically maps the disks or volumes to the target disks only if the system bootability can be preserved. Otherwise, the automatic mapping is canceled and you have to map the disks or volumes manually.

Also, you have to map the volumes manually if they are Linux logical volumes, or Linux software RAID (MD devices). For more information on recovering logical volumes and MD devices, see Recovering MD devices and logical volumes.

The automatic mapping is performed as follows.

1. If the disk or volume is recovered to its original location, the mapping process reproduces the original disk/volume layout.

   The original location for a disk or volume means exactly the same disk or volume that has been backed up. A volume will not be considered original if its size, location or other physical parameters have been changed after backup. Changing the volume letter or label does not prevent the software from recognizing the volume.

2. If the disk or volume is recovered to a different location:
   • When recovering disks: The software checks the target disks for size and volumes. A target disk must contain no volumes and its size must be large enough to place the disk being recovered. Not initialized target disks will be initialized automatically.

     If the required disks cannot be found, you have to map the disks manually.

   • When recovering volumes: The software checks the target disks for unallocated space.

     If there is enough unallocated space, the volumes will be recovered "as is".

     If unallocated space on the target disks is less than the size of the volumes being recovered, the volumes will be proportionally shrunk (by decreasing their free space) in order to fit the unallocated space. If the shrunk volumes still cannot fit the unallocated space, you have to map the volumes manually.