On Wed, 2006-12-13 at 10:24 -0800, Richard Elling wrote: > > I've seen two cases of disk failure where errors only occurred during > > random I/O; all blocks were readable sequentially; in both cases, this > > permitted the disk to be replaced without data loss and without > > resorting to backups by doing a "dd" bit image copy to the replacement > > drive. > > ouch! This is a new one for my list. I suspect a firmware bug.
it wouldn't be "a" firmware bug -- two different models of disk in two very different systems (one was a 2.5" laptop drive, the other was a 3.5" normal size disk in a whitebox 1U rackmount PC). In both cases there were significant numbers of hard read errors during normal operation -- in one case, you couldn't boot without running into them. In one of the two cases, the system was turned off overnight, then turned on the next afternoon for the sequential copy. _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
