Re: Spare disk could not sleep / standby

[Molle Bestefich <molle.bestefich@gmail.com>]

Neil Brown wrote:
>> Is my perception of the situation correct?
> 
> No.  Writing the superblock does not cause the array to be marked
> active.
> If the array is idle, the individual drives will be idle.

Ok, thank you for the clarification.

>> Seems like a design flaw to me, but then again, I'm biased towards
>> hating this behaviour since I really like being able to put inactive
>> RAIDs to sleep..
> 
> Hmmm... maybe I misunderstood your problem.  I thought you were just
> talking about a spare not being idle when you thought it should be.
> Are you saying that your whole array is idle, but still seeing writes?
> That would have to be something non-md-specific I think.

No, the confusion is my bad.
That was the original problem posted by Peter Evertz, which you
provided a workaround for.

_I_ was just curious about the workings of MD in 2.6, since it sounded
a bit like it wasn't possible to put a RAID array to sleep.  I'm about
to upgrade a server to 2.6, which "needs" to spin down when idle.  Got
a bit worried for a moment there =).

Thanks again.