[Beowulf] Big storage
hahn at mcmaster.ca
Fri Aug 31 13:43:39 EDT 2007
>> During a READ operation, if the RAID controller finds an unreadable
>> (uncorrectable) disk sector, then it will immediately reconstruct the
>> missing data for that sector using redundant data from the rest of the
>> array, and WRITE that data to the unreadable (uncorrectable) sector to
>> force sector reallocation if needed by the disk.
I don't believe MD does online scrubbing. but you _can_ trigger it
to do a check and/or scrub cycle (of the whole array, I think).
>> features. The absence of these features is the main reason that I don't
>> think Linux software RAID is very good.
as always, the main advantage to open-source, software implementations
is malleability. MD improves fast.
> quite a while ago and use it heavily. Presumably the maintainers (Neil
> Brown? or is he just the mdadm maintainer) are aware of this lack/criticism?
Niel is very responsive and responsible.
> As presented, it certainly seems like features that ought to be added.
> It would be interesting to cc LKML for comment.
linux-raid at vger.kernel.org is the real nexus of md stuff. feel free to
redirect followups there...
regards, mark hahn.
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