Date: Wed, 10 Oct 2012 10:16:28 +0900 From: Wanpeng Qian <spf72sa9@rhythm.ocn.ne.jp> To: freebsd-fs@freebsd.org Subject: Why zfs need to scan whole fs while I attach a HDD to mirror. Message-ID: <29CDA684DFBE02spf72sa9@rhythm.ocn.ne.jp>
next in thread | raw e-mail | index | archive | help
Hi guys
my zpool is config as follow:
NAME STATE READ WRITE CKSUM
storage ONLINE 0 0 0
mirror-0 ONLINE 0 0 0
da2 ONLINE 0 0 0
ada2 ONLINE 0 0 0
mirror-1 ONLINE 0 0 0
da1 ONLINE 0 0 0
da4 ONLINE 0 0 0
mirror-2 ONLINE 0 0 0
da3 ONLINE 0 0 0
ada3 ONLINE 0 0 0
mirror-3 ONLINE 0 0 0
ada0 ONLINE 0 0 0
ada1 ONLINE 0 0 0
cache
da5 ONLINE 0 0 0
recently, I replace mirror-3, from two 2T to two 3T.
first I detach one hdd, and attach new hdd to that mirror.
after attach, zfs starting resilvering as expect.
but zfs will scan whole fs to resiver new hdd.
I think that is not necessery. only copy one disk data to new one
is enough. scan the whole fs will spend a lot of time as follow:
scan: resilver in progress since Wed Oct 10 07:12:52 2012
1.20T scanned out of 6.48T at 121M/s, 12h39m to go
308G resilvered, 18.60% done
does this function correctly?
Regards
Qian.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?29CDA684DFBE02spf72sa9>