Groups > comp.os.linux.development.system > #704

ext4 readout using dumpe2fs

From	"Bill Cunningham" <nospam@nspam.invalid>
Newsgroups	comp.os.linux.development.system
Subject	ext4 readout using dumpe2fs
Date	2014-05-14 15:29 -0400
Organization	Aioe.org NNTP Server
Message-ID	<ll0g6n$f1n$1@speranza.aioe.org> (permalink)

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    I have this dump using dumpe2fs -h I understand the -h switch shows only 
limited information but I want to post the dump. From what I see extent is 
listed in the dump so there are extents somewhere but this dump doesn't show 
where. And I know my fs is ext4. One thing I am consistantly not seeing is 
how many bytes or nybbles even per block, inode, superblock, journal and so 
on.

Filesystem volume name:
Last mounted on:          /
Filesystem UUID:          cadd356c-52c6-4f4b-945d-608e3bbf023e
Filesystem magic number:  0xEF53
Filesystem revision #:    1 (dynamic)
Filesystem features:      has_journal ext_attr resize_inode dir_index 
filetype needs_recovery extent flex_bg sparse_super large_file huge_file 
uninit_bg dir_nlink extra_isize
Filesystem flags:         signed_directory_hash
Default mount options:    user_xattr acl
Filesystem state:         clean
Errors behavior:          Continue
Filesystem OS type:       Linux
Inode count:              1826816
Block count:              7295232
Reserved block count:     72940
Free blocks:              6361327
Free inodes:              1715517
First block:              0
Block size:               4096
Fragment size:            4096
Reserved GDT blocks:      254
Blocks per group:         32768
Fragments per group:      32768
Inodes per group:         8192
Inode blocks per group:   512
Flex block group size:    16
Filesystem created:       Tue May 22 16:37:52 2012
Last mount time:          Wed May 14 14:15:41 2014
Last write time:          Wed May 14 10:15:36 2014
Mount count:              3
Maximum mount count:      -1
Last checked:             Wed May 14 09:48:14 2014
Check interval:           0 (<none>)
Lifetime writes:          3076 MB
Reserved blocks uid:      0 (user root)
Reserved blocks gid:      0 (group root)
First inode:              11
Inode size:           256
Required extra isize:     28
Desired extra isize:      28
Journal inode:            8
First orphan inode:       153505
Default directory hash:   half_md4
Directory Hash Seed:      539dd829-5bd6-424f-aa3f-1d8c3fd799a6
Journal backup:           inode blocks
Journal features:         journal_incompat_revoke
Journal size:             128M
Journal length:           32768
Journal sequence:         0x00001cac
Journal start:            1

How many bytes per whatever ? <shrug>

Bill

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ext4 readout using dumpe2fs "Bill Cunningham" <nospam@nspam.invalid> - 2014-05-14 15:29 -0400
  Re: ext4 readout using dumpe2fs "Bill Cunningham" <nospam@nspam.invalid> - 2014-05-14 15:54 -0400
  Re: ext4 readout using dumpe2fs Lusotec <nomail@nomail.not> - 2014-05-14 23:26 +0100

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