This sounds like the same behavior as opensolaris 2009.06. I had several disks
recently go UNAVAIL, and the spares did not take over. But as soon as I
physically removed a disk, the spare started replacing the removed disk. It
seems UNAVAIL is not the same as the disk not being there. I wish the
We have a number of shared spares configured in our ZFS pools, and
we're seeing weird issues where spares don't get used under some
circumstances. We're running Solaris 10 U6 using pools made up of
mirrored vdevs, and what I've seen is:
* if ZFS detects enough checksum errors on an active disk,
