In a recent message, I detailed the excessive checksum errors that occurred after replacing a disk. It seems that after a resilver completes, it leaves a large number of blocks in the pool which fail to checksum properly. Afterward, it is necessary to scrub the pool in order to correct these errors.
After some testing, it seems that this only occurs with RAID-Z. The same behavior can be observed on both snv_59 and snv_60, though I do not have any other installs to test at the moment. The following commands should reproduce this result in a small test pool. Chris mkdir /tmp/test mkfile 64m /tmp/test/0 /tmp/test/1 zpool create test raidz /tmp/test/0 /tmp/test/1 mkfile 16m /test/file zpool export test rm /tmp/test/0 zpool import -d /tmp/test test mkfile 64m /tmp/test/0 zpool replace test /tmp/test/0 # wait for the resilver to complete, and observe that it completes successfully zpool status test # scrub the pool zpool scrub test # watch the checksum errors accumulate as the scrub progresses zpool status test _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
