Date: Tue, 4 Dec 2007 18:15:43 +0300 From: "Eugene M. Minkovskii" <emin@mccme.ru> To: freebsd-questions@freebsd.org Subject: add/remove disks in gmirror Message-ID: <20071204151543.GA17343@mccme.ru>
next in thread | raw e-mail | index | archive | help
Hi all!
I use FreeBSD 6.2
I want to try use gmirror to constract raid5, so I do following:
# dd if=/dev/zero of=zero0 bs=1024 count=102400
# dd if=/dev/zero of=zero1 bs=1024 count=102400
# dd if=/dev/zero of=zero2 bs=1024 count=102400
# mdcontrol -a -t vnode zero0
# mdcontrol -a -t vnode zero1
# mdcontrol -a -t vnode zero2
# cat /boot/propeller
drive b0 device /dev/md0
drive b1 device /dev/md1
drive b2 device /dev/md2
volume propeller
plex org raid5 512k
sd drive b0
sd drive b1
sd drive b2
# gvinum create /boot/propeller
# newfs /dev/gvinum/propeller
# mount /dev/gvinum/propeller mountpoint/
This working excellent, but I want to try what can I do if some
of the disk crashed? So, I do following:
# gvinum rm b2
# mdcontrol -d -u md2
# dd if=/dev/zero of=zero2 bs=1024 count=102400
# mdcontrol -a -t vnode zero2
So, I see files in mountpoint, but what should I do to attach new
disk /dev/md2 into raid5? Perhaps I need to use rebuildparity,
but I see following line in man gvinum:
All subdisks in the plex must be up for a parity check
So, how can I up subdisk?
# gvinum l
3 drives:
D b2 State: down /dev/md2 A: 99/99 MB (100%)
D b0 State: up /dev/md0 A: 0/99 MB (0%)
D b1 State: up /dev/md1 A: 0/99 MB (0%)
1 volume:
V propeller State: up Plexes: 1 Size: 99 MB
1 plex:
P propeller.p0 R5 State: up Subdisks: 2 Size: 99 MB
2 subdisks:
S propeller.p0.s0 State: up D: b0 Size: 99 MB
S propeller.p0.s1 State: up D: b1 Size: 99 MB
--
Sensory yours, Eugene Minkovskii
Сенсорно ваш, Евгений Миньковский
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20071204151543.GA17343>