dumpe2fs

dump ext2/ext3 filesystem information

ex:  

dumpe2fs  /dev/hda1

mpe2fs 1.38 (30-Jun-2005)

Filesystem volume name:   /

Last mounted on:          

Filesystem UUID:          1004b524-1c21-4829-bb94-0b5dada664c8

Filesystem magic number:  0xEF53

Filesystem revision #:    1 (dynamic)

Filesystem features:      has_journal ext_attr resize_inode dir_index filetype sparse_super large_file

Default mount options:    user_xattr acl

Filesystem state:         clean

Errors behavior:          Continue

Filesystem OS type:       Linux

Inode count:              2560864

Block count:              2560351

Reserved block count:     128017

Free blocks:              1215812

Free inodes:              2431393

First block:              0

Block size:               4096

Fragment size:            4096

Reserved GDT blocks:      625

Blocks per group:         32768

Fragments per group:      32768

Inodes per group:         32416

Inode blocks per group:   1013

Filesystem created:       Tue Aug  5 18:03:45 2008

Last mount time:          Thu Jan  1 05:36:59 2009

Last write time:          Thu Jan  1 09:26:35 2009

Mount count:              95

Maximum mount count:      -1

Last checked:             Tue Aug  5 18:03:45 2008

Check interval:           0 ()

Reserved blocks uid:      0 (user root)

Reserved blocks gid:      0 (group root)

First inode:              11

Inode size:  128

Journal inode:            8

Default directory hash:   tea

Directory Hash Seed:      2b724a84-72d7-4a1e-a4fb-e9d5d09e4581

Journal backup:           inode blocks

Group 0: (Blocks 0-32767)

  Primary superblock at 0, Group descriptors at 1-1

  Reserved GDT blocks at 2-626

  Block bitmap at 627 (+627), Inode bitmap at 628 (+628)

  Inode table at 629-1641 (+629)

  0 free blocks, 32405 free inodes, 2 directories

  Free blocks: 

  Free inodes: 12-32416

Group 1: (Blocks 32768-65535)

  Backup superblock at 32768, Group descriptors at 32769-32769

  Reserved GDT blocks at 32770-33394

  Block bitmap at 33395 (+627), Inode bitmap at 33396 (+628)

  Inode table at 33397-34409 (+629)

  29415 free blocks, 32416 free inodes, 0 directories

  Free blocks: 36121-65535

  Free inodes: 32417-64832

Group 2: (Blocks 65536-98303)

  Block bitmap at 65536 (+0), Inode bitmap at 65537 (+1)

  Inode table at 65538-66550 (+2)

  31746 free blocks, 32414 free inodes, 1 directories

  Free blocks: 66552-88063, 88069-96255, 96257-98303

  Free inodes: 64834, 64836-97248

Group 3: (Blocks 98304-131071)

  Backup superblock at 98304, Group descriptors at 98305-98305

  Reserved GDT blocks at 98306-98930

  Block bitmap at 98931 (+627), Inode bitmap at 98932 (+628)

  Inode table at 98933-99945 (+629)

  30813 free blocks, 32396 free inodes, 0 directories

  Free blocks: 99946-114687, 114689-122879, 123192-131071

  Free inodes: 97268, 97270-129664

Group 4: (Blocks 131072-163839)

  Block bitmap at 131072 (+0), Inode bitmap at 131073 (+1)

  Inode table at 131074-132086 (+2)

  31734 free blocks, 32416 free inodes, 0 directories

  Free blocks: 132088-151440, 151459-163839

  Free inodes: 129665-162080

Group 5: (Blocks 163840-196607)

  Backup superblock at 163840, Group descriptors at 163841-163841

  Reserved GDT blocks at 163842-164466

  Block bitmap at 164467 (+627), Inode bitmap at 164468 (+628)

  Inode table at 164469-165481 (+629)

  13148 free blocks, 30388 free inodes, 212 directories

  Free blocks: 165518-165522, 165524-165531, 165533-165535, 165537-165538, 165541-165546, 165548-165554, 165558-165562, 165573, 165576-165818, 165820-165887, 165891-167936, 167938, 167940-168618, 168807-168922, 169101-169226, 169381-169403, 169638-169760, 170300, 170390-170416, 170611-170692, 170695-170790, 170993-171100, 171288-171541, 171640-171760, 172077-172296, 172387-172655, 172733-174079, 174081-174083, 174085-176127, 176129, 176133-176135, 176150-176580, 176718-176829, 177002-177018, 177053-177117, 177286-177411, 177677-177699, 177748-177781, 177847-177969, 178312, 178467-178591, 178786-178863, 178996-179026, 179633-179735, 179834-179880, 179910-180006, 180224, 180531-180579, 180670-180752, 180773-180969, 180976-180997, 181028-181096, 181172-181280, 181518-181865, 182000-182061, 182216-182271, 182283, 184320, 184322, 186381, 189062, 189065, 189071-189098, 189311-189648, 189799-190039, 190297-190463, 190471, 190476-190639, 190705-190751, 190849-190909, 190920-191024, 191035-191661, 191672-191953, 191974-192124, 192183-192457, 193135, 193138-193154, 193533-193604, 193714-193800, 194381-194390, 194408-194427, 196328, 196459

  Free inodes: 164072, 164077, 164111-194496