On 18-Oct-09, at 6:41 AM, Adam Mellor wrote:
I Too have seen this problem.
I had done a zfs send from my main pool "terra" (6 disk raidz on
seagate 1TB drives) to a mirror pair of WD Green 1TB drives.
ZFS send was successful, however i noticed the pool was degraded
after a while (~1 week) with one of the mirror disks constantly re-
silvering (40 TB resilvered on a 1TB disk) something was fishy.
I removed the disk that was getting the re-silver and replaced it
with another WD Green 1TB (factory new) and added it as a mirror to
the pool again it re-silvered successfully. i performed a scrub the
next day (couple of reboots etc) and it started re-silvering the
replaced drive.
I still had most of the data in the original pool, i performed a
md5sum against some of the original files (~20GB files) and the ex-
mirror copy and the md5 sums came back the same.
This doesn't test much; ZFS will use whichever side of the mirror is
good.
--Toby
I have since blown away the ex-mirror and re-created the zpool
mirror and copied the data back.
...
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