I am doing a simple experiment.
I get FreeBSD image from here:
ftp://ftp.freebsd.org/pub/FreeBSD/snapshots/ISO-IMAGES/11.0/FreeBSD-11.0-CURRENT-amd64-r283577-20150526-memstick.img.xz
Then I run in bhyve with two additional "disks" created with truncate -s 4g:
$ bhyveload -m 1G -d
~/tmp/FreeBSD-11.0-CURRENT-amd64-r283577-20150526-memstick.img test
$ bhyve -A -HP -s 0:0,hostbridge -s 1,lpc -s 2:0,virtio-net,tap0 -s
3:0,virtio-blk,/home/avg/tmp/FreeBSD-11.0-CURRENT-amd64-r283577-20150526-memstick.img
-s 3:1,virtio-blk,/tmp/l2arc-test/hdd1,sectorsize=512/4096 -s
3:2,virtio-blk,/tmp/l2arc-test/hdd2,sectorsize=512/4096 -l com1,stdio -l
com2,/dev/nmdm0A -c 2 -m 1g test
Note sectorsize=512/4096 options. Not sure if it's them that cause the trouble.
Then, in the VM:
$ zpool create l2arc-test mirror /dev/vtbd1 /dev/vtbd2
$ zfs create -p l2arc-test/ROOT/initial
$ tar -c --one-file-system -f - / | tar -x -C /l2arc-test/ROOT/initial -f -
Afterwards, zpool status -v reports no problem.
But then I run zpool scrub and get the following in the end:
$ zpool status -v
pool: l2arc-test
state: ONLINE
status: One or more devices has experienced an error resulting in data
corruption. Applications may be affected.
action: Restore the file in question if possible. Otherwise restore the
entire pool from backup.
see: http://illumos.org/msg/ZFS-8000-8A
scan: scrub repaired 356K in 0h0m with 9 errors on Tue Jun 2 13:58:17 2015
config:
NAME STATE READ WRITE CKSUM
l2arc-test ONLINE 0 0 9
mirror-0 ONLINE 0 0 18
vtbd1 ONLINE 0 0 25
vtbd2 ONLINE 0 0 23
errors: Permanent errors have been detected in the following files:
/l2arc-test/ROOT/initial/usr/bin/svnlitesync
/l2arc-test/ROOT/initial/usr/freebsd-dist/kernel.txz
/l2arc-test/ROOT/initial/usr/freebsd-dist/src.txz
/l2arc-test/ROOT/initial/usr/lib/clang/3.6.1/lib/freebsd/libclang_rt.asan-x86_64.a
The same issue is reproducible with ahci-hd.
My host system is a recent amd64 CURRENT as well. The hardware platform is AMD.
--
Andriy Gapon
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