This week for the first time I toyed with OpenZFS on a USB device: a
mobile hard disk drive connected to the dock of an HP EliteBook 8570p.
A light test, with the pool imported but not writing to the dataset at
suspend time.
At resume time (22:31), the device was still physically connected but
the pool suffered an I/O failure (and the keyboard and trackball on USB
were unusable).
Sep 3 22:31:03 momh167-gjp4-8570p ZFS[11239]: vdev state changed,
pool_guid=$8076233369858608335 vdev_guid=$13893535540375859253
Sep 3 22:31:03 momh167-gjp4-8570p ZFS[11243]: pool I/O failure,
zpool=$Transcend error=$28
Sep 3 22:31:03 momh167-gjp4-8570p ZFS[11247]: pool I/O failure,
zpool=$Transcend error=$28
Sep 3 22:31:03 momh167-gjp4-8570p ZFS[11251]: pool I/O failure,
zpool=$Transcend error=$28
Sep 3 22:31:03 momh167-gjp4-8570p ZFS[11255]: pool I/O failure,
zpool=$Transcend error=$28
Sep 3 22:31:03 momh167-gjp4-8570p ZFS[11259]: catastrophic pool I/O
failure, zpool=$Transcend
I cleared pool errors (after which the keyboard and trackball became
usable), exported the pool, physically disconnected the drive, restarted
the OS, reconnected, imported and – luckily – cleared the remaining
metadata errors through a scrub.
Please, might something be done to improve suspend/resume reliability
with storage on USB?
Might I/O failures be less likely if I connect the drive to the notebook
instead of its dock?
TIA
----
More from /var/log/messages at https://pastebin.com/CqRYbFZm
Other relevant info below.
root@momh167-gjp4-8570p:~ # date ; uptime ; uname -v
Thu Sep 3 22:45:07 BST 2020
10:45PM up 6 mins, 6 users, load averages: 0.20, 0.27, 0.13
FreeBSD 13.0-CURRENT #63 r364768: Tue Aug 25 20:08:23 BST 2020
root@momh167-gjp4-8570p:/usr/obj/usr/src/amd64.amd64/sys/GENERIC-NODEBUG
root@momh167-gjp4-8570p:~ # zpool status -v
pool: copperbowl
state: ONLINE
status: Some supported features are not enabled on the pool. The pool can
still be used, but some features are unavailable.
action: Enable all features using 'zpool upgrade'. Once this is done,
the pool may no longer be accessible by software that does not
support
the features. See zpool-features(5) for details.
scan: scrub repaired 0B in 01:39:31 with 0 errors on Thu Sep 3
01:12:21 2020
config:
NAME STATE READ WRITE CKSUM
copperbowl ONLINE 0 0 0
ada0p4.eli ONLINE 0 0 0
errors: No known data errors
root@momh167-gjp4-8570p:~ # zpool import Transcend && zfs load-key
Transcend/VirtualBox
Enter passphrase for 'Transcend/VirtualBox':
root@momh167-gjp4-8570p:~ # zpool status -v Transcend
pool: Transcend
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: https://zfsonlinux.org/msg/ZFS-8000-8A
scan: scrub repaired 0B in 00:15:33 with 0 errors on Wed Sep 2
22:38:56 2020
config:
NAME STATE READ WRITE CKSUM
Transcend ONLINE 0 0 0
da0p1 ONLINE 0 0 0
errors: Permanent errors have been detected in the following files:
<metadata>:<0x0>
<metadata>:<0x3d>
root@momh167-gjp4-8570p:~ # zpool scrub Transcend
root@momh167-gjp4-8570p:~ # zfs version
zfs-0.8.0-1
zfs-kmod-0.8.0-1
root@momh167-gjp4-8570p:~ # zpool status -v Transcend
pool: Transcend
state: ONLINE
scan: scrub repaired 0B in 00:17:53 with 0 errors on Thu Sep 3
23:03:57 2020
config:
NAME STATE READ WRITE CKSUM
Transcend ONLINE 0 0 0
da0p1 ONLINE 0 0 0
errors: No known data errors
root@momh167-gjp4-8570p:~ # zfs get
compression,compressratio,encryption,used,referenced,mountpoint
Transcend Transcend/VirtualBox
NAME PROPERTY VALUE SOURCE
Transcend compression zstd local
Transcend compressratio 1.70x -
Transcend encryption off default
Transcend used 76.4G -
Transcend referenced 76.4G -
Transcend mountpoint /Volumes/t500 local
Transcend/VirtualBox compression zstd inherited from Transcend
Transcend/VirtualBox compressratio 1.00x -
Transcend/VirtualBox encryption aes-256-gcm -
Transcend/VirtualBox used 200K -
Transcend/VirtualBox referenced 200K -
Transcend/VirtualBox mountpoint /Volumes/t500/VirtualBox inherited
from Transcend
root@momh167-gjp4-8570p:~ # ls -hl
/Volumes/t500/VirtualBox/Windows/Windows.vdi
-rw------- 1 grahamperrin grahamperrin 69G Sep 3 16:58
/Volumes/t500/VirtualBox/Windows/Windows.vdi
root@momh167-gjp4-8570p:~ # du -hs
/Volumes/t500/VirtualBox/Windows/Windows.vdi
36G /Volumes/t500/VirtualBox/Windows/Windows.vdi
root@momh167-gjp4-8570p:~ #
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