View Source

{kb-symptom}
Message received:

{code}Can not back up /dev/sdb partition since /dev/sda partition has the same identifier.
{code}\\

{kb-cause}
{color:blue}fdisk{color} does not correctly write the partition ID when partitioning a disk.

{info:title=Note}
CDP requires all partitions to have a unique ID even if the partition has not been selected for backup.
{info}\\

{kb-resolution}
A unique partition ID must be created.

{note:title=Warning}
This is a dangerous operation. Make sure all data has been backed up *before* changing any partition information on your disk. A failure in changing partition data can make the machine unbootable.
{note}\\

{info:title=Note}
Some operating systems such as RHEL 5 and Centos use an older version of fdisk contained in the util-linux package, which does not include the ability to change the partition identifier. The util-linux package has been replaced in more updated operating systems with the util-linux-ng package.

{info}\\

{code}
root@shell:~# /usr/sbin/r1soft/bin/r1soft-partid /dev/sda
Current disk identifier: 239AF3B1
New disk identifier: 39C82E8D
{code}\\

{kb-related-articles}\\