On Tue, 28 Apr 2009, Richard Elling wrote:
Yes and there is a very important point here. There are 2 different sorts of scrubbing: read and rewrite. ZFS (today) does read scrubbing, which does not reset the decay process. Some RAID arrays also do rewrite scrubs which does reset the decay process. The problem with rewrite scrubbing is that you
I am not convinced that there is a "decay" process. There is considerable magnetic hysteresis involved. It seems most likely that corruption happens all of a sudden, and involves more than one or two bits. More often than not we hear of a number of sectors failing at one time.
Do you have a reference to research results which show that a gradual "decay" process is a significant factor?
Bob -- Bob Friesenhahn bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
