Messages in this thread | | | From | Neil Brown <> | Date | Thu, 10 Aug 2006 09:18:24 +1000 | Subject | Re: modifying degraded raid 1 then re-adding other members is bad |
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On Wednesday August 9, jengelh@linux01.gwdg.de wrote: > >> Why we're updating it BACKWARD in the first place? > > > >To avoid writing to spares when it isn't needed - some people want > >their spare drives to go to sleep. > > That sounds a little dangerous. What if it decrements below 0?
It cannot. md decrements the event count only on a dirty->clean transition, and only if it had previously incremented the count on a clean->dirty transition. So it can never go below what it was when the array was assembled.
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