e2fsck: Bad magic number in super-block
M. Lewis
cajun at cajuninc.com
Wed Nov 1 19:27:16 UTC 2006
Matija Nalis wrote:
> On Tue, Oct 31, 2006 at 08:15:30PM -0500, M. Lewis wrote:
>> I posted this to the Fedora-list, but thought I might get some
>> additional information here as well.
>>
>> I have a HD that refuses to mount with a 'bad magic number in
>> super-block'. I'm running FedoraCore 6 x86_64.
>>
>> [root at moe ~]# fdisk -l /dev/hdc
>>
>> Disk /dev/hdc: 250.0 GB, 250059350016 bytes
>> 255 heads, 63 sectors/track, 30401 cylinders
>> Units = cylinders of 16065 * 512 = 8225280 bytes
>>
>> Device Boot Start End Blocks Id System
>> /dev/hdc1 * 1 13 104391 83 Linux
>> /dev/hdc2 14 9729 78043770 8e Linux LVM
>
> are you ABSOLUTELY SURE that /dev/hdc2 really containt DIRECTLY the ext3
> filesystem ?
>
> By FDISK output, it looks like it is not ext3 partition, but a physical
> volume controlled by LVM, so you should use LVM tools to find real data
> (vgscan, vgdisplay, pvscan, lvscan, ...)
>
> the ext3 partition you are looking for is probably on logical volume on that
> LVM...
>
Thanks Matija. No, at this point the only thing I am sure of is I can't
mount the drive with my data.
I'm not familiar with any of the LVM tools. Here's the output of the
tools you suggested:
[root at moe ~]# vgscan
Reading all physical volumes. This may take a while...
Found volume group "VolGroup00" using metadata type lvm2
[root at moe ~]# vgdisplay
--- Volume group ---
VG Name VolGroup00
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 3
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 1
Act PV 1
VG Size 74.41 GB
PE Size 32.00 MB
Total PE 2381
Alloc PE / Size 2380 / 74.38 GB
Free PE / Size 1 / 32.00 MB
VG UUID vXWCaM-XkRG-l28x-tyH1-Rrf4-KjXF-AfASLY
[root at moe ~]# pvscan
PV /dev/hda2 VG VolGroup00 lvm2 [74.41 GB / 32.00 MB free]
Total: 1 [74.41 GB] / in use: 1 [74.41 GB] / in no VG: 0 [0 ]
[root at moe ~]# lvscan
ACTIVE '/dev/VolGroup00/LogVol00' [72.44 GB] inherit
ACTIVE '/dev/VolGroup00/LogVol01' [1.94 GB] inherit
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