I have a filesystem that has some bad group information that I would like
to be able to fix. It wont't fsck becuase of this problem, and
consequently won't mount. This is what debugfs says about the first 22
blocks:
debugfs: show_super_stats
Filesystem is read-only
Volume name = (none)
Last mounted directory = (none)
Filesystem UUID = 4ea979a3-7567-4cf5-9b1e-01074dfa35d2
Last mount time = Thu Nov 18 21:58:18 1999
Last write time = Thu Nov 25 01:56:59 1999
Mount counts = 4 (maximal = 20)
Filesystem OS type = Linux
Superblock size = 1024
Block size = 4096, fragment size = 4096
Inode size = 128
2501856 inodes, 2401363 free
5000050 blocks, 3541803 free, 250002 reserved, first block = 0
32768 blocks per group
32768 fragments per group
16352 inodes per group
153 groups (2 descriptors blocks)
Group 0: block bitmap at 0, inode bitmap at 0, inode table at 0
0 free blocks, 0 free inodes, 0 used directories
Group 1: block bitmap at 0, inode bitmap at 0, inode table at 0
0 free blocks, 0 free inodes, 0 used directories
Group 2: block bitmap at 0, inode bitmap at 0, inode table at 0
0 free blocks, 0 free inodes, 0 used directories
Group 3: block bitmap at 0, inode bitmap at 0, inode table at 0
0 free blocks, 0 free inodes, 0 used directories
Group 4: block bitmap at 0, inode bitmap at 0, inode table at 0
0 free blocks, 0 free inodes, 0 used directories
Group 5: block bitmap at 0, inode bitmap at 0, inode table at 0
0 free blocks, 0 free inodes, 0 used directories
Group 6: block bitmap at 0, inode bitmap at 0, inode table at 0
0 free blocks, 0 free inodes, 0 used directories
Group 7: block bitmap at 0, inode bitmap at 0, inode table at 0
0 free blocks, 0 free inodes, 0 used directories
Group 8: block bitmap at 0, inode bitmap at 0, inode table at 0
0 free blocks, 0 free inodes, 0 used directories
Group 9: block bitmap at 0, inode bitmap at 0, inode table at 0
0 free blocks, 0 free inodes, 0 used directories
Group 10: block bitmap at 0, inode bitmap at 0, inode table at 0
0 free blocks, 0 free inodes, 0 used directories
Group 11: block bitmap at 0, inode bitmap at 0, inode table at 0
0 free blocks, 0 free inodes, 0 used directories
Group 12: block bitmap at 0, inode bitmap at 0, inode table at 0
0 free blocks, 0 free inodes, 0 used directories
Group 13: block bitmap at 0, inode bitmap at 0, inode table at 0
0 free blocks, 0 free inodes, 0 used directories
Group 14: block bitmap at 0, inode bitmap at 0, inode table at 0
0 free blocks, 0 free inodes, 0 used directories
Group 15: block bitmap at 0, inode bitmap at 0, inode table at 0
0 free blocks, 0 free inodes, 0 used directories
Group 16: block bitmap at 524288, inode bitmap at 524289, inode table at
524293
201 free blocks, 15825 free inodes, 33 used directories
Group 17: block bitmap at 557056, inode bitmap at 557057, inode table at
557061
159 free blocks, 15671 free inodes, 45 used directories
Group 18: block bitmap at 589824, inode bitmap at 589825, inode table at
589829
12753 free blocks, 15753 free inodes, 63 used directories
Group 19: block bitmap at 622592, inode bitmap at 622593, inode table at
622597
27570 free blocks, 15519 free inodes, 64 used directories
Group 20: block bitmap at 655360, inode bitmap at 655361, inode table at
655365
29548 free blocks, 15503 free inodes, 184 used directories
Group 21: block bitmap at 688128, inode bitmap at 688129, inode table at
688133
30260 free blocks, 15597 free inodes, 38 used directories
Group 22: block bitmap at 720896, inode bitmap at 720897, inode table at
720901
27880 free blocks, 15683 free inodes, 105 used directories
I would like to go into the descriptors block and fix the group
information for the first 15 groups and see if I can salvage anything. If
anyone knows how to fix this, I would greatly appreciate it. There is a
lot of things on that partition that I don't want to have to re-create.
Thanks in advance for your help.
Grant
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