Gentoo Archives: gentoo-user

From: Dan Cowsill <danthehat@×××××.com>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] Migrating RAID: Degraded RAID5 from RAID1?
Date: Sun, 29 Nov 2009 14:29:07
Message-Id: 4ef07b8c0911290628g2ee8f7e9rc2759a98cbdde79d@mail.gmail.com
In Reply to: Re: [gentoo-user] Migrating RAID: Degraded RAID5 from RAID1? by andrey larin
1 On Sat, Nov 28, 2009 at 2:30 AM, andrey larin <ubergitler@××××××.ru> wrote:
2 > let suppose
3 > sda and sdb is raid 1 md1
4 > and new sdc
5 > remove sdb from raid
6 > mdadm /dev/md1 -f /dev/sdb
7 > mdadm /dev/md1 -r /dev/sdb
8 > then create degraded raid 5
9 > don't forget md1 is still running
10 > mdadm --create /dev/md2 --level 5 -n 3 /dev/sdb /dev/sdc missing
11 > then copy all data from md1  to md2
12 > fix /etc/fstab and /boot/grub/grub.conf
13 > destroy md1
14 > and add sda to md2
15
16 Excellent. All I need to know is that there is indeed a mechanism for
17 doing this and that I am not crazy. Man pages should fill in the
18 rest.
19
20 Thanks for your help, Andrey