Re: Safely swapping a disk in a RAID456

Hi,

On 09/30/2011 05:42 PM, martin f krafft wrote:

Dear list,

I would like to swap out a drive in a RAID6 (4 drives), but ideally
without letting the RAID degrade. I was thinking that it should be
possible to declare the new disk a copy of the old one, let it sync,
then remove the old one and let the new one take over, but MD does
not seem to support that.

If you can stop the array it can be done. Otherwise you will have to degrade it while replacing

Replacing without degrade:
- stop the raid
- do a dd from old disk to new disk
- replace the disk
- re-start the raid

Cheers,


Rudy