> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
> boun...@opensolaris.org] On Behalf Of Rasmus Fauske
>
> I want to replace some slow consumer drives with new edc re4 ones but
> when I do a replace it needs to scan the full pool and not only that
> disk set (or just the old drive)
>
> Is this normal ? (the speed is always slow in the start so thats not
> what I am wondering about, but that it needs to scan all of my 18.7T to
> replace one drive)
>
> The disk config:
> pool: tank
> state: ONLINE
> 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 Tue Jun 14 10:03:37 2011
> 16.8G scanned out of 18.7T at 1.52M/s, (scan is slow, no estimated
> time)
> 388M resilvered, 0.09% done
> config:
>
> NAME STATE READ WRITE CKSUM
> tank ONLINE 0 0 0
> raidz2-0 ONLINE 0 0 0
> c10t14d0 ONLINE 0 0 0
> c10t15d0 ONLINE 0 0 0
> c10t16d0 ONLINE 0 0 0
> c10t17d0 ONLINE 0 0 0
> c10t18d0 ONLINE 0 0 0
> c10t19d0 ONLINE 0 0 0
> c10t20d0 ONLINE 0 0 0
> raidz2-1 ONLINE 0 0 0
> c10t21d0 ONLINE 0 0 0
> replacing-1 ONLINE 0 0 0
> c10t35d0 ONLINE 0 0 0
> c10t22d0 ONLINE 0 0 0 (resilvering)
> c10t23d0 ONLINE 0 0 0
> c10t24d0 ONLINE 0 0 0
> c10t25d0 ONLINE 0 0 0
> c10t26d0 ONLINE 0 0 0
> c10t27d0 ONLINE 0 0 0
Only this raidz2 vdev is resilvering. The other raidz2-vdev's are idle.
You can verify this with the command:
zpool iostat 30
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