Why do I see the message “Ignoring supplied major …” following a system recovery?
Following a Linux system recovery, when I query information related to LVM on the restored system the following message is displayed: “Ignoring supplied major 253 number – kernel assigns major numbers dynamically.”
The SBAdmin recovery process will create logical volumes using the “–persistent” flag of “lvcreate”. The major number used when creating the the logical volume is the major number of the “device-mapper” device at the time of recovery. It is possible for the major number to change depending on when the “dm_mod” module is loaded.
The warning message is harmless and should only be seen if the major number of the “device-mapper” device (as found in /proc/devices) differs from when the logical volume was created.
You may disable persistent major and minor numbers of the logical volume using the following command:
# lvchange –persistent n /dev/myvg/mylv