My old array was 8, 4TB drives. I added 4 more drives to the array and used the grow command and 23 hours later, the reshape finished successfully and I now have a 40TB array according to mdadm:
Version : 1.2
Creation Time : Sat Dec 2 21:22:25 2017
Raid Level : raid6
Array Size : 39068871680 (37258.98 GiB 40006.52 GB)
Used Dev Size : 3906887168 (3725.90 GiB 4000.65 GB)
Raid Devices : 12 Total
Devices : 12 Persistence
Superblock is persistent
But, I’m still only able to “see” my original 24T. I tried this command: xfs_growfs /dev/md0 and got this error:
xfs_growfs: /dev/md0 is not a mounted XFS filesystem
Odd, because it IS mounted. So I thought, maybe I should unmount it first. Did that and same error.
Not home at the moment but do I need to unount and STOP the array?
I saw somebody mentioned using GParted…I went in there and it said to select the partition and click ‘Check’ to I’m guessing, grow it. I’ll try that later since I have a few people streaming from me via Plex and I don’t want to be rude and kick them off. :)
But is GParted the way to go? The ‘check’ option isn’t selectable because the array is running and mounted. I’m guessing that’s why I can’t do anything with it at the moment. Can anyone confirm?
The exact message in GParted is:
14.56 TiB of unallocated space within the partition.
To grow the file system to fill the partition, select the partition and choose the menu item:
Partition --> Check.