Re: Mounting logical partition: invalid superblock error

[Mayuresh <mayuresh%acm.org@localhost>]

On Tue, Jul 05, 2011 at 01:19:34PM -0400, Thor Lancelot Simon wrote:
> Also, it will be difficult to help you if you do not send exact details of
> what you type and how the system responds.  A log of a session in which
> you try to do this would be a good start, along with the output of the
> "fdisk" and "disklabel" commands for the disk in question.

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-bash-4.2# fdisk /dev/rsd1d 
Disk: /dev/rsd1d
NetBSD disklabel disk geometry:
cylinders: 16383, heads: 16, sectors/track: 63 (1008 sectors/cylinder)
total sectors: 625142447

BIOS disk geometry:
cylinders: 1024, heads: 255, sectors/track: 63 (16065 sectors/cylinder)
total sectors: 625142447

Partition table:
0: Linux native (sysid 131)
    start 2048, size 1024000 (500 MB, Cyls 0/32/33-63/221/30)
1: FreeBSD or 386BSD or old NetBSD (sysid 165)
    start 103426470, size 102398310 (49999 MB, Cyls 6438-12811), Active
2: Extended partition (sysid 5)
    start 205824780, size 419312565 (204742 MB, Cyls 12812-38912)
3: Linux native (sysid 131)
    start 1028160, size 102398310 (49999 MB, Cyls 64-6437)
        PBR is not bootable: All bytes are identical (0x00)
Extended partition table:
E0: Linux swap or Prime or Solaris (sysid 130)
    start 205824843, size 8193087 (4001 MB, Cyls 12812-13321)
        PBR is not bootable: Bad magic number (0x3519)
E1: Linux native (sysid 131)
    start 214017993, size 411119352 (2007
=================================
-bash-4.2# disklabel /dev/rsd1d 
# /dev/rsd1d:
type: SCSI
disk: FreeAgent Go    
label: fictitious
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 16
sectors/cylinder: 1008
cylinders: 16383
total sectors: 625142447
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0           # microseconds
track-to-track seek: 0  # microseconds
drivedata: 0 

10 partitions:
#        size    offset     fstype [fsize bsize cpg/sgs]
 d: 625142447         0     unused      0     0        # (Cyl.      0 -
620180*)
 e:   1024000      2048 Linux Ext2      0     0        # (Cyl.      2*-
1017*)
 f: 102398310 103426470     4.2BSD      0     0     0  # (Cyl. 102605*-
204191*)
 g: 102398310   1028160 Linux Ext2      0     0        # (Cyl.   1020 -
102605*)
 i:   8193087 205824843       swap                     # (Cyl. 204191*-
212319*)
 j: 411119352 214017993 Linux Ext2      0     0        # (Cyl. 212319*-
620175*)
disklabel: boot block size 0
disklabel: super block size 0
=================================
-bash-4.2# mount /dev/sd1j /mnt/linux/
mount_ext2fs: /dev/sd1j on /mnt/linux: incorrect super block
=================================
-bash-4.2# mount /dev/sd1g /mnt/linux/
mount_ext2fs: /dev/sd1g on /mnt/linux: incorrect super block
=================================
Note: I can mount /dev/sd1e, /dev/sd1f fine.