[Beowulf] MD check/scrub

Leif Nixon nixon at nsc.liu.se
Tue Nov 13 08:39:05 EST 2007

Mark Hahn <hahn at mcmaster.ca> writes:

>> I'd prefer they put their effort into supplying a raid controller that
>> can actually detect corrupt raid sets. (cf. the recent thread "Big storage")
> not me.  raid is too important to be trusted to hardware - have you
> tried MD's check/scrub features?

Yes, now. Or rather, Peter Kjellström has.

If a raid 6 stripe has a corrupted block, it seems md "repairs" the
damage by recalculating the parity blocks. Less than ideal...

Leif Nixon                       -            Systems expert
National Supercomputer Centre    -      Linkoping University

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