Date: Mon, 10 Dec 2012 11:38:55 -0800 From: Andrew Leonard <lists@hurricane-ridge.com> To: freebsd-fs@freebsd.org Subject: ZFS mirrored separate log device replacement scans entire pool? Message-ID: <CADUQDp8aM0LmZFvFjii_h-26E5CH0Asu5F4KNUTN%2BZ37jne9UA@mail.gmail.com>
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This is likely more of a curiosity than an issue, unless it indicates I did
something wrong: Why does replacing half of a mirrored ZFS separate log
cause the entire zpool to be scanned? To wit:
> zpool status
pool: tank01
state: DEGRADED
status: One or more devices is currently being resilvered. The pool will
continue to function, possibly in a degraded state.
action: Wait for the resilver to complete.
scan: resilver in progress since Mon Dec 10 11:15:49 2012
7.54T scanned out of 27.0T at 3.12G/s, 1h46m to go
0 resilvered, 27.93% done
config:
NAME STATE READ WRITE CKSUM
tank01 DEGRADED 0 0 0
raidz2-0 ONLINE 0 0 0
da2 ONLINE 0 0 0
da3 ONLINE 0 0 0
da4 ONLINE 0 0 0
da5 ONLINE 0 0 0
da6 ONLINE 0 0 0
da7 ONLINE 0 0 0
da8 ONLINE 0 0 0
da9 ONLINE 0 0 0
da10 ONLINE 0 0 0
da11 ONLINE 0 0 0
raidz2-1 ONLINE 0 0 0
da12 ONLINE 0 0 0
da13 ONLINE 0 0 0
da14 ONLINE 0 0 0
da15 ONLINE 0 0 0
da16 ONLINE 0 0 0
da17 ONLINE 0 0 0
da18 ONLINE 0 0 0
da19 ONLINE 0 0 0
da20 ONLINE 0 0 0
da21 ONLINE 0 0 0
raidz2-2 ONLINE 0 0 0
da22 ONLINE 0 0 0
da23 ONLINE 0 0 0
da24 ONLINE 0 0 0
da32 ONLINE 0 0 0
da26 ONLINE 0 0 0
da27 ONLINE 0 0 0
da33 ONLINE 0 0 0
da29 ONLINE 0 0 0
da30 ONLINE 0 0 0
da31 ONLINE 0 0 0
logs
mirror-3 DEGRADED 0 0 0
da34 ONLINE 0 0 0
replacing-1 OFFLINE 0 0 0
1754652639903581713 OFFLINE 0 0 0 was /dev/da35
da25 ONLINE 0 0 0
errors: No known data errors
> zpool get version tank01
NAME PROPERTY VALUE SOURCE
tank01 version 28 default
> zfs get version tank01
NAME PROPERTY VALUE SOURCE
tank01 version 5 -
> uname -a
FreeBSD zfs12.sbri.org 8.3-STABLE FreeBSD 8.3-STABLE #0: Sun Aug 12
07:31:24 PDT 2012 root@zfs12.sbri.org:/usr/obj/usr/src/sys/GENERIC
amd64
Thanks,
Andy
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