RE: Events?

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> -----Original Message-----
> From: Neil Brown [mailto:neilb@xxxxxxx]
> Sent: Saturday, May 30, 2009 4:47 PM
> To: lrhorer@xxxxxxxxxxx
> Cc: linux-raid@xxxxxxxxxxxxxxx
> Subject: Re: Events?
> 
> On Saturday May 30, lrhorer@xxxxxxxxxxx wrote:
> >
> > What does the "Events" field reported by -Dt signify, and why does the
> > number sometimes decrease?  I've seen the number change, but I don't see
> > anything in any of the system logs corresponding to something that would
> > seem to relate.
> 
> Changes just as device failure and adding or removing a device.
> Also transitions from 'active' to 'clean' and back.

OK, but shouldn't these transitions at least be logged somewhere?

> Sometimes the dirty->transition causes the event counter to retreat if
> md is use the new 'clean' state is indistinguishable from the old
> 'clean' state.  This allows us not to always be waking up spare drives
> just to tell them about clean->active->clean transitions.

That makes sense, but I think the admin should be able to inspect the
details of the transactions.

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