To restore a backup made via bpcdump:

 - Attach the external sata drive
 - sudo esata mount
 - Select the backup to restore, for example ve1200-20080605
 - Examine the contents of /media/esata/ve1200-20080605/info
 - Ensure a partition (preferably an LVM2 LV) exists to restore into, and that
   its size is at least as large as the size identified in the 'info' file.
   Note the partition's device name, for example /dev/vg0/ve1200.
 - md5sum /media/esata/ve1200-20080605/image
   Verify the above command outputs the same signature as contained within
   /media/esata/ve1200-20080605/image.md5sum.  If they are not the same,
   the selected image has become corrupted and another backup should be
   selected to restore.
 - dd_rescue -Ay 8192 /media/esata/ve1200-20080605/image /dev/vg0/ve1200
 - Examine the output from dd_rescue; ensure there are no errors reported and
   that it returns without error.  This command will take some time.
 - dd if=/dev/vg0/ve1200 bs=<imageblocksize> | md5sum
   The emitted MD5 signature should match
   /media/esata/ve1200-20080605/image.md5sum.
 - The partition is now ready to be mounted for use by the BackupPC VE.  It may
   be necessary to create the VE's conf file in /etc/vz/conf.
 - sudo vzctl start 1200
 - Verify correct operation of the restored BackupPC VE.

This process will be replaced by a script, bpcrestore:

 - To restore an old version of VE 1200 over itself:
   bpcrestore /media/esata/ve1200-20080605
   (this command will create VE 1200 if it doesn't exist on the HN on which
    bpcrestore was executed.)

 - To restore an old version of VE 1200, implicitly creating a new VE 1201:
   bpcrestore /media/esata/ve1200-20080605 1201

 - Perhaps the script will instead be bpcbackup --restore, akin to vzdump's
   operation.