Gentoo Archives: gentoo-user

From: Alan Mackenzie <acm@×××.de>
To: gentoo-user@l.g.o
Subject: [gentoo-user] How broken is my raid device /dev/md6?
Date: Sat, 22 Dec 2012 14:01:48
Message-Id: 20121222135342.GA3955@acm.acm
1 Hi, all.
2
3 Just built kernel 3.6.11 and when I tried to install it with lilo, I got
4 this difficult error message:
5
6 Fatal: Trying to map files from unnamed device 0x0000 (NFS/RAID
7 mirror down ?)
8
9 . So I eventually had a look at dmesg for my raid setup, and found this
10 - note lines 15 - 19:
11
12 [ 2.148410] md: Waiting for all devices to be available before
13 autodetect
14 [ 2.149891] md: If you don't use raid, use raid=noautodetect
15 [ 2.151546] md: Autodetecting RAID arrays.
16 [ 2.180356] md: Scanned 4 and added 4 devices.
17 [ 2.181819] md: autorun ...
18 [ 2.183244] md: considering sdb6 ...
19 [ 2.184666] md: adding sdb6 ...
20 [ 2.186079] md: sdb3 has different UUID to sdb6
21 [ 2.187492] md: adding sda6 ...
22 [ 2.188884] md: sda3 has different UUID to sdb6
23 [ 2.190484] md: created md6
24 [ 2.191883] md: bind<sda6>
25 [ 2.193224] md: bind<sdb6>
26 [ 2.194538] md: running: <sdb6><sda6>
27 15 [ 2.195855] md: kicking non-fresh sda6 from array!
28 16 [ 2.197154] md: unbind<sda6>
29 17 [ 2.205840] md: export_rdev(sda6)
30 [ 2.207176] bio: create slab <bio-1> at 1
31 19 [ 2.208520] md/raid1:md6: active with 1 out of 2 mirrors
32 [ 2.209835] md6: detected capacity change from 0 to 34359672832
33 [ 2.211187] md: considering sdb3 ...
34 [ 2.212444] md: adding sdb3 ...
35 [ 2.213691] md: adding sda3 ...
36 [ 2.215117] md: created md3
37 [ 2.216349] md: bind<sda3>
38 [ 2.217569] md: bind<sdb3>
39 [ 2.218765] md: running: <sdb3><sda3>
40 [ 2.220025] md/raid1:md3: active with 2 out of 2 mirrors
41 [ 2.221231] md3: detected capacity change from 0 to 429507543040
42 [ 2.222508] md: ... autorun DONE.
43 [ 2.230821] md6: unknown partition table
44
45 . Further perusal of a log file showed this error first happened on
46 2012-11-29. It would appear /dev/md6 has been firing on one cylinder
47 ever since, and I've been unaware of this. :-(
48
49 What does it mean for sda6 to be "non-fresh"?
50
51 /dev/md6 is my root partition (including /usr :-(), so I can't unmount
52 it for investigation.
53
54 Could somebody please suggest how I might go about repairing this
55 problem.
56
57 Thanks!
58
59 --
60 Alan Mackenzie (Nuremberg, Germany).

Replies

Subject Author
Re: [gentoo-user] How broken is my raid device /dev/md6? Volker Armin Hemmann <volkerarmin@××××××××××.com>