View superblock in dumpe2fs

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[[Email protected] ~] # Dumpe2fs/dev/sda1

Dumpe2fs 1.39 (29-may-2006)

Filesystem volume name:/boot file system name

Last mounted on: <not available>

Filesystem UUID: b20ffbe6-f56d-4eee-a3a2-22145aa88e36

Filesystem magic number: 0xef53

Filesystem Revision #: 1 (dynamic)

Filesystem features: has_journal ext_attr resize_inode dir_index filetype needs_recovery sparse_super

Default mount options: preset mount parameters for user_xattr ACL

Filesystem state: Clean: No problem

Errors behavior: continue

Filesystem OS type: Linux

Inode count: 26104 total inode count

Block count: 104388 Blocks

Reserved block count: 5219

Free blocks: 89087 remaining blocks

Free inodes: 26070 remaining inode

First block: 1

Block Size: 1024 size of each block

Fragment Size: 1024

Reservedgdt blocks: 256

Blocks per group: 8192

Fragments per group: 8192

Inodes per group: 2008

Inode blocks per group: 251

Filesystem created: Tue Oct 21 15:21:01 2014

Last Mount time: Wed Nov 5 09:55:55 2014

Last write time: Wed Nov 5 09:55:55 2014

Mount count: 19

Maximum Mount count:-1

Last checked: Tue Oct 21 15:21:01 2014

Check Interval: 0 (<none>)

Reserved blocks uid: 0 (User Root)

Reserved blocks GID: 0 (group root)

First inode: 11

Inode size: 128 size of each inode

Journal inode: 8

Default directory hash: Tea

Directory hash seed: 61428c96-2452-4c54-b4e4-21fe31cceb6b

Journal backup: inode Blocks

Journal size: 4114 K

Group 0: (Blocks 1-8192) the first data group content, including the block start and end numbers

Primary superblock at 1, group descriptors at 2-2

Reserved gdt blocks at 3-258.

Block bitmap at 259 (+ 258), inode bitmap at 260 (+ 259)

Inode table at 261-511 (+ 260)

479 free blocks, 1991 free inodes, 2 Directories

Free blocks: 4642-5120

Free inodes: 18-2008

Group 1: (blocks 8193-16384)

Backup superblock at 8193, group descriptors at 8194-8194

Reserved gdt blocks at 8195-8450

Block bitmap at 8451 (+ 258), inode bitmap at 8452 (+ 259)

Inode table at 8453-8703 (+ 260)

4420 free blocks, 1991 free inodes, 1 Directories

Free blocks: 11808-12288,122 96-12800,128 10-13312,133 49-15360,153 62-15872,159 77-16384

Free inodes: 2026-4016

Group 2: (blocks 16385-24576)

Block bitmap at 16385 (+ 0), inode bitmap at 16386 (+ 1)

Inode table at 16387-16637 (+ 2)

7939 free blocks, 2008 free inodes, 0 Directories

Free blocks: 16638-24576

Free inodes: 4017-6024

Group 3: (blocks 24577-32768)

Backup superblock at 24577, group descriptors at 24578-24578

Reserved gdt blocks at 24579-24834

Block bitmap at 24835 (+ 258), inode bitmap at 24836 (+ 259)

Inode table at 24837-25087 (+ 260)

7681 free blocks, 2008 free inodes, 0 Directories

Free blocks: 25088-32768

Free inodes: 6025-8032

Group 4: (blocks 32769-40960)

Block bitmap at 32769 (+ 0), inode bitmap at 32770 (+ 1)

Inode table at 32771-33021 (+ 2)

7939 free blocks, 2008 free inodes, 0 Directories

Free blocks: 33022-40960

Free inodes: 8033-10040

Group 5: (blocks 40961-49152)

Backup superblock at 40961, group descriptors at 40962-40962

Reserved gdt blocks at 40963-41218

Block bitmap at 41219 (+ 258), inode bitmap at 41220 (+ 259)

Inode table at 41221-41471 (+ 260)

7681 free blocks, 2008 free inodes, 0 Directories

Free blocks: 41472-49152

Free inodes: 10041-12048

Group 6: (blocks 49153-57344)

Block bitmap at 49153 (+ 0), inode bitmap at 49154 (+ 1)

Inode table at 49155-49405 (+ 2)

7939 free blocks, 2008 free inodes, 0 Directories

Free blocks: 49406-57344

Free inodes: 12049-14056

Group 7: (blocks 57345-65536)

Backup superblock at 57345, group descriptors at 57346-57346

Reserved gdt blocks at 57347-57602

Block bitmap at 57603 (+ 258), inode bitmap at 57604 (+ 259)

Inode table at 57605-57855 (+ 260)

7681 free blocks, 2008 free inodes, 0 Directories

Free blocks: 57856-65536

Free inodes: 14057-16064

Group 8: (blocks 65537-73728)

Block bitmap at 65537 (+ 0), inode bitmap at 65538 (+ 1)

Inode table at 65539-65789 (+ 2)

7939 free blocks, 2008 free inodes, 0 Directories

Free blocks: 65790-73728

Free inodes: 16065-18072

Group 9: (blocks 73729-81920)

Backup superblock at 73729, group descriptors at 73730-73730

Reserved gdt blocks at 73731-73986

Block bitmap at 73987 (+ 258), inode bitmap at 73988 (+ 259)

Inode table at 73989-74239 (+ 260)

7681 free blocks, 2008 free inodes, 0 Directories

Free blocks: 74240-81920

Free inodes: 18073-20080

Group 10: (blocks 81921-90112)

Block bitmap at 81921 (+ 0), inode bitmap at 81922 (+ 1)

Inode table at 81923-82173 (+ 2)

7939 free blocks, 2008 free inodes, 0 Directories

Free blocks: 82174-90112

Free inodes: 20081-22088

Group 11: (blocks 90113-98304)

Block bitmap at 90113 (+ 0), inode bitmap at 90114 (+ 1)

Inode table at 90115-90365 (+ 2)

7939 free blocks, 2008 free inodes, 0 Directories

Free blocks: 90366-98304

Free inodes: 22089-24096

Group 12: (blocks 98305-104387)

Block bitmap at 98305 (+ 0), inode bitmap at 98306 (+ 1)

Inode table at 98307-98557 (+ 2)

5830 free blocks, 2008 free inodes, 0 Directories

Free blocks: 98558-104387

Free inodes: 24097-26104

This article is from the "Linux O & M sharing" blog, please be sure to keep this source http://liangey.blog.51cto.com/9097868/1572125

View superblock in dumpe2fs