Gentoo Archives: gentoo-user-de

From: Matthias Nimscholz <sierra666@×××.de>
To: gentoo-user-de@l.g.o
Subject: Re: AW: [gentoo-user-de] ext3 scheint hin zu sein
Date: Tue, 13 Jun 2006 12:16:30
Message-Id: 1150200699.15336.5.camel@desktux.sierra.lan
In Reply to: AW: [gentoo-user-de] ext3 scheint hin zu sein by ralf.prengel@comline.de
1 Am Dienstag, den 13.06.2006, 13:36 +0200 schrieb
2 ralf.prengel@×××××××.de:
3
4 >
5 > > -----Ursprüngliche Nachricht-----
6 > > Von: Prengel, Ralf
7 > > Gesendet: Dienstag, 13. Juni 2006 13:17
8 > > An: gentoo-user-de@l.g.o
9 > > Betreff: Re: [gentoo-user-de] ext3 scheint hin zu sein
10 > >
11 > > Christian Diehl schrieb:
12 > > > Meine Kristallkugel verrät mir, daß Du ein
13 > > Linux-Software-Raid verwendest.
14 > > > Was für ein Raid ist das? Ist das Raid intakt? Was sagt mdadm oder
15 > > > 'cat
16 > >
17 > > Raid selber läuft.
18 > > Es scheint nur das Filesystem darauf hin zu sein .
19 >
20 > linuxnfs:/tmp # e2fsck -b 8193 /dev/md1
21 > e2fsck 1.38 (30-Jun-2005)
22 > e2fsck: Bad magic number in super-block while trying to open /dev/md1
23 >
24 > The superblock could not be read or does not describe a correct ext2
25 > filesystem. If the device is valid and it really contains an ext2
26 > filesystem (and not swap or ufs or something else), then the superblock
27 > is corrupt, and you might try running e2fsck with an alternate superblock:
28 > e2fsck -b 8193 <device>
29
30 Du scheinst ein 4k blocksize zu verwenden.
31 > Block size: 4096
32 Versuch doch mal, ob Du einen anderen superblock bei 32768 findest.
33
34 aus man fsck.ext3:
35 -b superblock
36
37 Instead of using the normal superblock, use an alternative
38 superblock specified by superblock. This option is normally used
39 when the primary superblock has been corrupted. The location of
40 the backup superblock is dependent on the filesystem's
41 blocksize. For filesystems with 1k blocksizes, a backup
42 superblock can be found at block 8193; for filesystems with 2k
43 blocksizes, at block 16384; and for 4k blocksizes, at block
44 32768.
45 Additional backup superblocks can be determined by using the
46 mke2fs program using the -n option to print out where the
47 superblocks were created. The -b option to mke2fs, which
48 specifies blocksize of the filesystem must be specified in order
49 for the superblock locations that are printed out to be
50 accurate.
51 If an alternative superblock is specified and the filesystem is
52 not opened read-only, e2fsck will make sure that the primary
53 superblock is updated appropriately upon completion of the
54 filesystem check.
55
56
57 Matthias

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