On Fri Feb 25, 2011 at 05:07:48PM +0100, Albert Pauw wrote:
> Can anybody explain to me what "active (auto-read-only)" mean in
> /proc/mdstats?
>
When the array is assembled, it's set in "auto-read-only" mode. As soon
as anything tries to write to it, it gets set to normal write mode (or
you can trigger this manually by doing "mdadm -w" on the array). I'm not
sure why this is done - possibly it make it simpler for md to skip
running various internal processes on that array (as it knows that the
array isn't being dirtied).
I usually see this with swap arrays - most filesystems will immediately
open the array in read/write mode, so trigger the switch.
Cheers,
Robin
--
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( ' } | Robin Hill <robin@xxxxxxxxxxxxxxx> |
/ / ) | Little Jim says .... |
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