If this is observed:
[root@kris-lnx.cisco.com root]# /sbin/debugfs /dev/hda5
debugfs 1.27 (8-Mar-2002)
debugfs: stats
Filesystem volume name: /var
Last mounted on: <not available>
Filesystem UUID: 0c9bcda8-e2df-11d7-8b69-00042322d47f
Filesystem magic number: 0xEF53
Filesystem revision #: 1 (dynamic)
Filesystem features: has_journal filetype needs_recovery
sparse_super
Filesystem state: clean
Errors behavior: Continue
Filesystem OS type: Linux
Inode count: 130560
Block count: 261048
Reserved block count: 13052
Free blocks: 238776
Free inodes: 130014
First block: 0
Block size: 4096
Fragment size: 4096
Blocks per group: 32768
Fragments per group: 32768
Inodes per group: 16320
Inode blocks per group: 510
Last mount time: Mon Mar 22 13:18:07 2004
Last write time: Mon Mar 22 13:18:07 2004
Mount count: 18
Maximum mount count: -1
Last checked: Wed Nov 19 18:43:14 2003
Check interval: 0 (<none>)
Reserved blocks uid: 0 (user root)
Reserved blocks gid: 0 (group root)
First inode: 11
Inode size: 128
Journal UUID: <none>
Journal inode: 8
Journal device: 0x0000
First orphan inode: 0
Group 0: block bitmap at 2, inode bitmap at 3, inode table at 4
19200 free blocks, 16308 free inodes, 2 used directories
Group 1: block bitmap at 32770, inode bitmap at 32771, inode table at
32772
31994 free blocks, 16226 free inodes, 19 used directories
Group 2: block bitmap at 65536, inode bitmap at 65537, inode table at
65540
31651 free blocks, 16262 free inodes, 27 used directories
Group 3: block bitmap at 98306, inode bitmap at 98307, inode table at
98308
30601 free blocks, 16258 free inodes, 24 used directories
Group 4: block bitmap at 131072, inode bitmap at 131073, inode table
at 131076
31713 free blocks, 16258 free inodes, 17 used directories
Group 5: block bitmap at 163842, inode bitmap at 163843, inode table
at 163844
31606 free blocks, 16230 free inodes, 28 used directories
Group 6: block bitmap at 196608, inode bitmap at 196609, inode table
at 196612
31712 free blocks, 16199 free inodes, 14 used directories
Group 7: block bitmap at 229378, inode bitmap at 229379, inode table
at 229380
30299 free blocks, 16273 free inodes, 11 used directories
debugfs:
now here, "Group 7" starts at (229378-2) i.e 229376.
(-2 comes into picture if you consider superblock and group descriptors)
So, number of blocks in "Group 7" is ("Block count"-229376) =
261048-229376 = 31672
But we have "Blocks per group = 32768"
So number of blocks in "Group 7" is not same as "Blocks per group"
But it is fine in all the other groups.
Can someone enlighten the secret behind this?
Another question is, for "Group 6" inode bitmap at 196609, inode table
at 196612. What happened to the two blocks between inode bitmap and
inode table?
Thanks,
Krishna Srinivas
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