On Thu 2011-12-22 (10:09), Bob Friesenhahn wrote: > One of your disks failed to return a sector. Due to redundancy, the > original data was recreated from the remaining disks. This is normal > good behavior (other than the disk failing to read the sector).
So those checksum counts were historical? > Normally one would have done nothing other than 'zpool clear' after > thinking about the issue for a while. If there were many failures to > read from that disk, or the failures continue to accumulate for the > same disk, then that would have been cause to replace it. > > Doing a 'zpool scrub' is very much recommended in order to flush out > data which fails to read while redundancy is still available. I did a scrub and what worries me is that it came back with 0 issues when clearly there were considering what happens when I kick 1 disk out. Similarly I've seen that 'zpool clear' just sets you up for problems down the line. It just pretends there aren't errors. I managed to get the array back by resilvering, deleting affected files, resilvering other disk, scrubbing etc. but I'm wondering whether there's a way to diagnose and do this without completely removing and resilvering an entire disk at a time? > This is a bummer. If you had a spare slot (or spare installed disk) > you could have installed a new disk and done a replace with the > existing disk still live. Right, didn't think of that. Would've made it safer, but question above still stands. _______________________________________________ zfs-discuss mailing list firstname.lastname@example.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss