On Jun 30, 2013, at 2:42 PM, Stan Hoeppner wrote: > On 6/30/2013 1:43 PM, aurfalien wrote: > >> I understand swidth should = #data disks. > > No. "swidth" is a byte value specifying the number of 512 byte blocks > in the data stripe. > > "sw" is #data disks. > >> And the docs say for RAID 6 of 8 disks, that means 6. >> >> But parity is distributed and you actually have 8 disks/spindles working for you and a bit of parity on each. >> >> So shouldn't swidth equal disks in raid when its concerning distributed parity raid? > > No. Lets try visual aids. > > Set 8 coffee cups (disk drives) on a table. Grab a bag of m&m's. > Separate 24 blues (data) and 8 reds (parity). But are the cups 8oz, 16oz or smaller/larger? Ceramic, plastic, glass, etc...? Actually I really enjoyed the visual aid, many many thanks. - aurf _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
