Gentoo Archives: gentoo-user

From: Heinz Sporn <heinz.sporn@××××××××.com>
To: gentoo-user@l.g.o
Subject: [gentoo-user] Introducing RAID 1 into a running system
Date: Wed, 07 Sep 2005 08:50:40
Message-Id: 1126082764.11211.17.camel@spok.local.sporn-it.com
1 Hi all!
2
3 I was wondering if it is possible to introduce RAID 1 (i.e. mirroring of
4 a spare partition to be precise) into a running system? Let's assume
5 there is a disk A with partitions A1 and A2. A1 carries a fully
6 functional Gentoo, A2 is a spare partition. Kernel is 2.6.12.5 with Raid
7 stuff enabled.
8
9 Now I'd like to add a disk B (identical to disk A), duplicate the
10 partition layout from A and start mirroring A2 to B2.
11
12 Now let's also assume that A2 and B2 are set to partition type fd and
13 that there's a matching /etc/raidtype like
14
15 # /boot (RAID 1)
16 raiddev /dev/md0
17 raid-level 1
18 nr-raid-disks 2
19 chunk-size 32
20 persistent-superblock 1
21 device A2
22 raid-disk 0
23 device B2
24 raid-disk 1
25
26 Question: may I run mkraid /dev/md0 on the fly now or will that somehow
27 destroy the partition table on the entire disk A ?
28
29 --
30 Mit freundlichen Grüßen
31
32 Heinz Sporn
33
34 SPORN it-freelancing
35
36 Mobile: ++43 (0)699 / 127 827 07
37 Email: heinz.sporn@××××××××.com
38 heinz.sporn@××××××.at
39 Website: http://www.sporn-it.com
40 Snail: Steyrer Str. 20
41 A-4540 Bad Hall
42 Austria / Europe
43
44 --
45 gentoo-user@g.o mailing list

Replies

Subject Author
Re: [gentoo-user] Introducing RAID 1 into a running system Christoph Gysin <cgysin@×××.ch>