Rebuilding Disk Groups on a active MSA 2050 storage array

[KBEZ]

We need to rebuild the disk groups on one of our MSA 2050 storage systems. The storage have 2 disk groups currently configured as RAID 6+2. We have to rebuild the disk groups as RAID 10+2. There is active volumes on the array. Is there a way that the disk groups can be rebuild without losing data?

[SUBHAJIT KHANBARMAN_1]

@KBEZ 

There is no option to modify RAID from existing VDG. So it's better to take data backup, delete all VDG and Volumes. Then re-create VDG and volumes as per new RAID and then restore data from backup. This is better and easy approach.

Hope this helps!
Regards
Subhajit

I am an HPE employee

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[ArunKKR]

Hi,

MSA 2050 does not support RAID type migration of a disk group.

If you have spare slots and additional hard drives , you could create RAID 10 disk groups under the same Pool.

RAID 6 disk groups could then be deleted.

Any data in RAID 6 disk group will be migrated to other disk groups once disk group deletion is initiated. This is a very slow process (vdrain) and cannot be interrupted.

The new disk group created should have enough space to accommodate the data in RAID 6 disk group.

The easiest method is to take data back up, delete the RAID6 disk group/Pool, create new RAID 10 disk group and restore from back up as suggested by Subhajit.

[ArunKKR]

Hi,

To add on, if both disk groups are under single Pool, you could try to delete one of the RAID 6 disk groups so that the vdrain gets initiated.

This has the pre-requisite that the disk group 1 has enough free space to accommodate the data in disk group 2.

I would suggest to log a support case to check the configuration and free space if disk group deletion is planned.