On Sat, 2 Dec 2006, Al Hopper wrote: > > Some people on this list think that the RAID arrays are more likely > > to corrupt your data than JBOD (both with ZFS on top, for example, a > > ZFS mirror of 2 raid arrays or a JBOD mirror or raidz). There is no > > Can you present a cut/paste where that assertion was made?
I don't want to put words in Chad's mouth, but I think he might be misunderstanding representations that people make here about ZFS vs HW RAID. I don't think that people have asserted that "RAID arrays are more likely to corrupt data than a JBOD"; what I think people ARE asserting is that corruption is more likely to go undetected in a HW RAID than in a JBOD with ZFS. (A subtle, but important, difference.) The reason for this is understandable: if you write some data to a HW RAID device, you assume that unless otherwise notified, your data is safe. The HW RAID, but its very nature, is a black box that we assume is OK. With ZFS+JBOD, ZFS' built in end-to-end error checking will catch any silent errors created in the JBOD, when they happen, and can correct them (or at least notify you) right away. -- Rich Teer, SCSA, SCNA, SCSECA, OpenSolaris CAB member President, Rite Online Inc. Voice: +1 (250) 979-1638 URL: http://www.rite-group.com/rich _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
