Bruce Allen wrote: > > Yes, precisely. > > When I buy RAID controllers, I put this requirement directly in my bid > specifications. I say something like the following: > > ------------------------------------------------------------------ > > 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. > > In addition, the RAID controller will perform a continous or regular (at > least daily) background scan of all disk sectors to identify and repair > any unreadable sectors as described above. > > ------------------------------------------------------------------ > > I think it is a mistake to purchase a RAID controller without these > features. The absence of these features is the main reason that I don't > think Linux software RAID is very good. >
Ouch! I'd mentally filed linux software raid and good and trustworthy 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? As presented, it certainly seems like features that ought to be added. It would be interesting to cc LKML for comment. Andrew Walrond _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
