Gentoo Archives: gentoo-user

From: Francesco Talamona <francesco.talamona@××××.eu>
To: gentoo-user@l.g.o
Subject: [gentoo-user] Re: recovering RAID from an old server
Date: Sat, 20 Feb 2010 09:47:58
Message-Id: 201002201046.53373.francesco.talamona@know.eu
In Reply to: Re: [gentoo-user] recovering RAID from an old server by Iain Buchanan
1 > Should I be able to mount them automatically and let the SW RAID
2 > module sort it out or do I have to know how they're tied together
3 > beforehand?
4
5 > md: looking for a shared spare drive
6 > md100: no spare disk to reconstruct array! -- continuing in degraded
7 > mode
8 > md: recovery thread finished ...
9 > md: hde5 [events: 000003a5]<6>(write) hde5's sb offset: 273024
10 > md: hdg5 [events: 000003a5]<6>(write) hdg5's sb offset: 273024
11 > XFS mounting filesystem md(9,100)
12 > Ending clean XFS mount for filesystem: md(9,100)
13 >
14 > The partitions look like:
15 > 9 100 546112 md100
16 > 9 101 273024 md101
17
18 It seems it has correctly mounted its partition... Can't you find it?
19
20 I have the feeling that you are messing it up. If I understand it
21 correctly the server has an hardware RAID controller, that has to be
22 managed via its drivers.
23
24 Software RAID tools aren't suitable to mount correctly this setup, I
25 would mount random partition for testing purposes only, on a spare
26 machine.
27
28 The wiser thing to do is find an old livecd supporting PERC SAS (or
29 whatever raid card is in that Snap) RAID cards and assemble the array in
30 degraded mode for data recovery.
31
32 Another thing can come very useful: we once had a similar problem, we
33 ended up borrowing one identical disc from another running server to put
34 the array back online, we recovered our data, then restored the other
35 server's array.
36
37 HTH
38 Francesco
39
40 --
41 Linux Version 2.6.32-gentoo-r5, Compiled #2 SMP PREEMPT Wed Feb 17
42 20:30:02 CET 2010
43 Two 1GHz AMD Athlon 64 Processors, 4GB RAM, 4021.84 Bogomips Total
44 aemaeth

Replies

Subject Author
Re: [gentoo-user] Re: recovering RAID from an old server Iain Buchanan <iaindb@××××××××××××.au>