Last week, I tryed to grow my 13 drive RAID 6 Array to 14 drives. For some reason the system crashed a few seconds after entering the command.
Come to find out, after checking the SMART data on all of the drives in the array, 1 drive had Sector Reallocation Errors. After googling around a bit, and not finding any thing helpful, I decided to use ddrescue (dd_rescue) on the failing drive.
| Code: | sudo dd_rescue -A -v (bad drive i.e. /dev/sdd) (new drive i.e. /dev/sde) |
All this was done on a computer seperate from the server with the RAID installed to avoid any problems with MDADM. I recommend you doing the same.
Ubuntu / MDADM: Howto: Create RAID5 and Expand/Grow it using mdadm without loosing data
Disk Cloning Software: dd_rescue
