Re: Requesting replace mode for changing a disk

John Robinson
2009-05-09T11:41:11Z

On 08/05/2009 23:15, Goswin von Brederlow wrote:
> Hi,
>
> consider the following situation: You have a software raid that runs
> fine but one disk is suspect (e.g. SMART says failure imminent or
> something). How do you replace that disk?
>
> Currently you have do fail/remove the disk from the raid, add a
> fresh disk and resync. That leaves a large window in which redundancy
> is compromised. With current disk sizes that can be days.
>
> It would be nice if one could tell the kernel to replace a disk in a
> raid set with a spare without the need to degrade the raid.
>
> Thoughts?

I remember this being discussed a few months ago, and I think it's
fairly high up Neil Brown's to do/roadmap for the future.

Cheers,

John.