Date: Sat, 2 Sep 2017 18:40:15 +0200 From: Wiktor Niesiobedzki <bsd@vink.pl> To: freebsd-fs <freebsd-fs@freebsd.org> Subject: Resolving errors with ZVOL-s Message-ID: <CAH17caWLTOKvs-AoXGcUg8WkiBFZn1GFzMHeQwDUwmsWia7qBQ@mail.gmail.com>
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Hi,
I have recently encountered errors on my ZFS Pool on my 11.1-R:
$ uname -a
FreeBSD kadlubek 11.1-RELEASE-p1 FreeBSD 11.1-RELEASE-p1 #0: Wed Aug 9
11:55:48 UTC 2017
root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC
amd64
# zpool status -v tank
pool: tank
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 0 in 5h27m with 0 errors on Sat Sep 2 15:30:59 2017
config:
NAME STATE READ WRITE CKSUM
tank ONLINE 0 0 98
mirror-0 ONLINE 0 0 196
gpt/tank1.eli ONLINE 0 0 196
gpt/tank2.eli ONLINE 0 0 196
errors: Permanent errors have been detected in the following files:
dkr-test:<0x1>
dkr-test is ZVOL that I use within bhyve and indeed - within bhyve I have
noticed I/O errors on this volume. This ZVOL did not have any snapshots.
Following the advice mentioned in action I tried to restore the ZVOL:
# zfs desroy tank/dkr-test
But still errors are mentioned in zpool status:
errors: Permanent errors have been detected in the following files:
<0x5095>:<0x1>
I can't find any reference to this dataset in zdb:
# zdb -d tank | grep 5095
# zdb -d tank | grep 20629
I tried also getting statistics about metadata in this pool:
# zdb -b tank
Traversing all blocks to verify nothing leaked ...
loading space map for vdev 0 of 1, metaslab 159 of 174 ...
94.5G completed (1059MB/s) estimated time remaining: 0hr 25min 47sec
And now to my questions:
1. Do I interpret correctly, that this situation is probably due to error
during write, and both copies of the block got checksum mismatching their
data?
2. Is there any way to
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