Symptom
Message received:
Can not back up /dev/sdb partition since /dev/sda partition has the same identifier.
Cause
fdisk does not correctly write the partition ID when partitioning a disk.
 | Note CDP requires all partitions to have a unique ID even if the partition has not been selected as a Device in the Disk Safe for replication. |
Resolution
A unique partition ID must be created.
 | 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 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. In these cases you would need to manually upgrade the fdisk utility. |
# fdisk /dev/sdb (enter the correct disk identifier assigned by Linux)
fdisk> x (for advanced)
fdisk> i (for create partition id)
(Enter in an arbitrary number)
fdisk> w (to save and exit)
Related Articles
| Page: Backing Up Disks Without Partitioning (Knowledge Base) Labels: backup_3, partition_3, ext3_3 |
| Page: BMR of a Citrix Xen 6.0 paravirtualized VM (Knowledge Base) Labels: bare-metal_restore_3, disk_safe_3, partition_3, file_system_3, bmr_3, citrix_3, xen_3, pv_3, hvm_3 |
| Page: Restoring Files to a Smaller Drive (Knowledge Base) Labels: bare-metal_restore_3, partition_3 |
| Page: Creating a Unique Partition ID with fdisk (Knowledge Base) Labels: partition_3, fdisk_3 |
| Page: Creating a Unique Partition ID with fdisk (Knowledge Base) Labels: partition_3, fdisk_3 |
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