On Wed, 26 Aug 2009, Pavel Machek wrote:
On Tue 2009-08-25 17:20:13, david@xxxxxxx wrote:
On Wed, 26 Aug 2009, Pavel Machek wrote:
On Tue 2009-08-25 16:56:40, david@xxxxxxx wrote:
On Wed, 26 Aug 2009, Pavel Machek wrote:
There are storage devices that high highly undesirable properties
when they are disconnected or suffer power failures while writes are
in progress; such devices include flash devices and MD RAID 4/5/6
arrays.
change this to say 'degraded MD RAID 4/5/6 arrays'
also find out if DM RAID 4/5/6 arrays suffer the same problem (I strongly
suspect that they do)
I changed it to say MD/DM.
then you need to add a note that if the array becomes degraded before a
scrub cycle happens previously hidden damage (that would have been
repaired by the scrub) can surface.
I'd prefer not to talk about scrubing and such details here. Better
leave warning here and point to MD documentation.
I disagree with that, the way you are wording this makes it sound as if
raid isn't worth it. if you are going to say that raid is risky you need
to properly specify when it is risky
Ok, would this help? I don't really want to go to scrubbing details.
(*) Degraded array or single disk failure "near" the powerfail is
neccessary for this property of RAID arrays to bite.
that sounds reasonable
David Lang
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