Thread: An superblock tale of woe

goodly men , womenfolk of ubuntu-land. tale starts many electrical blackouts, followed exploding graphics card, end result system that, when booting, gives continuous input output errors , boot-eth not.

herein follows saga of tragedy not told since days of romeo , juliet. sda1, ghostboot partition, appeareth fine, , verily, ntfs partition, yea, windows 7, boot-eth fine , workest in forms. tis linux partition booth-eth not, point of not being address-able in fashion. should merely hope mount volume , save data, , start on option nuclear pavement. data yet hast reached salvation, , end doth seek.

1) sayeth fdisk?

code:

knoppix@microknoppix:~$ sudo fdisk -l    disk /dev/sda: 1000.2 gb, 1000204886016 bytes  255 heads, 63 sectors/track, 121601 cylinders units = cylinders of 16065 * 512 = 8225280 bytes sector size (logical/physical): 512 bytes / 512 bytes i/o size (minimum/optimal): 512 bytes / 512 bytes disk identifier: 0x9201fe6f       device boot      start         end      blocks   id  system  /dev/sda1   *           1           2       16033+   1  fat12  /dev/sda2               3       50994   409593240    7  hpfs/ntfs  /dev/sda3           50995      121601   567150727+  8e  linux lvm    disk /dev/sdb: 1000.2 gb, 1000204886016 bytes  255 heads, 63 sectors/track, 121601 cylinders units = cylinders of 16065 * 512 = 8225280 bytes sector size (logical/physical): 512 bytes / 512 bytes i/o size (minimum/optimal): 512 bytes / 512 bytes disk identifier: 0x9201fe50       device boot      start         end      blocks   id  system  /dev/sdb1               1          15      120456   83  linux  /dev/sdb2              16      121602   976641024   8e  linux lvm  knoppix@microknoppix:~$

2) more sayeth fdisk?

code:

knoppix@microknoppix:~$ sudo fdisk -l /dev/sda3    disk /dev/sda3: 580.8 gb, 580762344960 bytes  255 heads, 63 sectors/track, 70607 cylinders units = cylinders of 16065 * 512 = 8225280 bytes sector size (logical/physical): 512 bytes / 512 bytes i/o size (minimum/optimal): 512 bytes / 512 bytes disk identifier: 0x00000000    disk /dev/sda3 doesn't contain valid partition table    knoppix@microknoppix:~$ sudo mke2fs -n /dev/sda3  warning: 545 blocks unused.    filesystem label=  os type: linux  block size=4096 (log=2)  fragment size=4096 (log=2)  stride=0 blocks, stripe width=0 blocks  35516016 inodes, 141787136 blocks  7089384 blocks (5.00%) reserved super user first data block=0 maximum filesystem blocks=0  4327 block groups  32768 blocks per group, 32768 fragments per group  8208 inodes per group  superblock backups stored on blocks:  	32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,  	4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968,  	102400000

3) mounteth not, read-only

code:

knoppix@microknoppix:~$  knoppix@microknoppix:/media$ sudo mount -o,ro /dev/sda3  mount: unknown filesystem type 'lvm2_member'  knoppix@microknoppix:/media$

4) o, fsck, sayest thou?

code:

knoppix@microknoppix:~$ sudo fsck /dev/sda3  fsck: fsck.lvm2_member: not found  fsck: error 2 while executing fsck.lvm2_member /dev/sda3 knoppix@microknoppix:~$

5) , you, e2fsck, canst thou add tale of woe?

code:

knoppix@microknoppix:~$ e2fsck /dev/sda3  e2fsck: superblock invalid, trying backup blocks...  e2fsck: bad magic number in super-block while trying open /dev/sda3    superblock not read or not describe correct ext2 filesystem.  if device valid , contains ext2 filesystem (and not swap or ufs or else), superblock corrupt, , might try running e2fsck alternate superblock:      e2fsck -b 8193 <device>    knoppix@microknoppix:~$

6) mke2fs , e2fsck chant in harmony siren saga

code:

knoppix@microknoppix:~$ sudo mke2fs -n /dev/sda3  warning: 545 blocks unused.    filesystem label=  os type: linux  block size=4096 (log=2)  fragment size=4096 (log=2)  stride=0 blocks, stripe width=0 blocks  35516016 inodes, 141787136 blocks  7089384 blocks (5.00%) reserved super user first data block=0 maximum filesystem blocks=0  4327 block groups  32768 blocks per group, 32768 fragments per group  8208 inodes per group  superblock backups stored on blocks:  	32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,  	4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968,  	102400000      knoppix@microknoppix:~$ sudo e2fsck -y -b 32768 /dev/sda3  e2fsck: bad magic number in super-block while trying open /dev/sda3    superblock not read or not describe correct ext2 filesystem.  if device valid , contains ext2 filesystem (and not swap or ufs or else), superblock corrupt, , might try running e2fsck alternate superblock:      e2fsck -b 8193 <device>    knoppix@microknoppix:~$ sudo e2fsck -y -b 98304 /dev/sda3  e2fsck: bad magic number in super-block while trying open /dev/sda3    superblock not read or not describe correct ext2 filesystem.  if device valid , contains ext2 filesystem (and not swap or ufs or else), superblock corrupt, , might try running e2fsck alternate superblock:      e2fsck -b 8193 <device>      knoppix@microknoppix:~$ sudo e2fsck -y -b 163840 /dev/sda3  e2fsck: bad magic number in super-block while trying open /dev/sda3    superblock not read or not describe correct ext2 filesystem.  if device valid , contains ext2 filesystem (and not swap or ufs or else), superblock corrupt, , might try running e2fsck alternate superblock:      e2fsck -b 8193 <device>    knoppix@microknoppix:~$ sudo e2fsck -y -b 229376 /dev/sda3  e2fsck: bad magic number in super-block while trying open /dev/sda3    superblock not read or not describe correct ext2 filesystem.  if device valid , contains ext2 filesystem (and not swap or ufs or else), superblock corrupt, , might try running e2fsck alternate superblock:      e2fsck -b 8193 <device>    knoppix@microknoppix:~$    etcetera, etcetera until ...    knoppix@microknoppix:~$ sudo e2fsck -y -b 102400000 /dev/sda3  e2fsck: invalid argument while trying open /dev/sda3    superblock not read or not describe correct ext2 filesystem.  if device valid , contains ext2 filesystem (and not swap or ufs or else), superblock corrupt, , might try running e2fsck alternate superblock:      e2fsck -b 8193 <device>    knoppix@microknoppix:~$

if (as indicated fdisk) actual filesystem (ext2/3/4 or whatever) on top of lvm volume, need mount *that* - don't think able mount /dev/sda3 directly

if do

code:

sudo pvdisplay sudo vgdisplay sudo lvdisplay

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