Using gdisk to Fix Backup GPT Table Errors in Linux

Description

When experiencing Errors partitioning additional storage after a RAID array has been expanded or partition issues with either Archiving or Extended storage drives on an S-Series Server. Check the partitions for errors using parted.

Product

exacqVision Server
Linux

Steps to Reproduce

Open Terminal from the machine hosting the storage drives.
Run the parted command to list the partition layout on all block devices.

parted command example

Expected Results

The results return the partition layout on all block devices with no Errors

Actual Results

The command returns an Error
The language may vary but the GPT table is always indicated.
- Error: The backup GPT table is not at the end of the disk
- Error: The backup GPT table is corrupt, but the primary appears OK, so that will be used.

In this example the GPT Table error is referring to the partition listed immediately after you are required to type OK to continue, in this case /dev/sdb.

Solution

From Terminal run the gdisk command on the partition with the GPT Table Error
You will be prompted with the following, the responses are in bold
- Command (? for help): x
- Expert command (? for help): e
- Expert command (? for help): w
- Do you want to proceed? (Y/N): Y
Once the command completes, reboot the system.
Run parted -l again (see above) to ensure there are no more GPT Table Errors.