On 9/22/2011 1:10 AM, Ulrich Windl wrote:
>>>> Dimitri Maziuk<[email protected]>  schrieb am 21.09.2011 um 19:24 in

>> (I wonder how many times you can re-add a physically failing drive
>> before you get your data corrupted -- there must be a clever
>> probabilistic formula for that ;)

> Would you please elaborate on that? I assume the missing changes are
replcated from the active leg once you re-add the offlined disk.

If mdadm fails a locally attached disk, you replace the disk. I don't 
see anything that lets you tell a san disk from a local one (there 
shouldn't be -- it's unix) so I'm wondering what mdadm will do if you 
keep re-adding a dead drive enough times. Maybe nothing.

I do know disks have failure modes that can make the whole thing 
unpleasant. Like slowing the server down to a crawl.

Dima
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