Date: Wed, 17 Dec 2014 15:15:30 -0500 From: Mike Tancsa <mike@sentex.net> To: "freebsd-hardware@freebsd.org" <freebsd-hardware@freebsd.org>, freebsd-questions <freebsd-questions@freebsd.org> Subject: zfs and 512/4096 sector sizes Message-ID: <5491E462.2020902@sentex.net>
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On a remote server, I replaced a dead 2TB disk with a new one that had
4096K sectors.
2014-12-11.22:40:30 zpool replace -f tank1 16144392433229115618 /dev/ada0
My ZFS pool then warned me after
pool: tank1
state: ONLINE
status: One or more devices are configured to use a non-native block size.
Expect reduced performance.
action: Replace affected devices with devices that support the
configured block size, or migrate data to a properly configured
pool.
Camcontrol and smartctl confirm the 2TB drive was indeed 4096. (All my
previous ones were 512, so didnt think to check)
# camcontrol identify ada0 | grep secto
sectors/track 63
sector size logical 512, physical 4096, offset 0
LBA supported 268435455 sectors
LBA48 supported 3907029168 sectors
# smartctl -a /dev/ada0 | grep -i 512
Sector Sizes: 512 bytes logical, 4096 bytes physical
So, with a new drive, I replaced the 4096 drive
2014-12-16.17:07:14 zpool replace tank1 ada0 ada11
# smartctl -a /dev/ada11 | grep -i 512
Sector Size: 512 bytes logical/physical
# camcontrol identify ada11 | grep -i sector
sectors/track 63
sector size logical 512, physical 512, offset 0
LBA supported 268435455 sectors
LBA48 supported 3907029168 sectors
yet, zfs is still complaining
# zpool status
pool: tank1
state: ONLINE
status: One or more devices are configured to use a non-native block size.
Expect reduced performance.
action: Replace affected devices with devices that support the
configured block size, or migrate data to a properly configured
pool.
scan: resilvered 898G in 8h4m with 0 errors on Wed Dec 17 15:01:18 2014
config:
NAME STATE READ WRITE CKSUM
tank1 ONLINE 0 0 0
raidz1-0 ONLINE 0 0 0
ada12 ONLINE 0 0 0
ada10 ONLINE 0 0 0
ada6 ONLINE 0 0 0
ada14 ONLINE 0 0 0
raidz1-1 ONLINE 0 0 0
ada11 ONLINE 0 0 0 block size: 512B
configured, 4096B native
ada1 ONLINE 0 0 0
ada8 ONLINE 0 0 0
ada9 ONLINE 0 0 0
raidz1-2 ONLINE 0 0 0
ada13 ONLINE 0 0 0
ada4 ONLINE 0 0 0
ada5 ONLINE 0 0 0
ada7 ONLINE 0 0 0
errors: No known data errors
# zdb | grep -i shift
metaslab_shift: 35
ashift: 9
metaslab_shift: 35
ashift: 9
metaslab_shift: 35
ashift: 9
This is RELENG_9 r275680
Any ideas if the reporting is cosmetic ? Or there is an issue
Sorry for the xpost as this is sort of both a hardware and config issue.
---Mike
--
-------------------
Mike Tancsa, tel +1 519 651 3400
Sentex Communications, mike@sentex.net
Providing Internet services since 1994 www.sentex.net
Cambridge, Ontario Canada http://www.tancsa.com/
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