dumpe2fs and external journal: Illegal inode number while reading journal inode

[Ralf Hildebrandt]

I created an ext4 fs with an external journal.
I wanted to check how big the journal was, and tried:

# dumpe2fs -h /dev/mapper/volg1-logv1
dumpe2fs 1.41.3 (12-Oct-2008)
Filesystem volume name:   <none>
Last mounted on:          <not available>
Filesystem UUID:          032613d3-6035-4872-bc0a-11db92feec5e
Filesystem magic number:  0xEF53
Filesystem revision #:    1 (dynamic)
Filesystem features:      has_journal resize_inode dir_index filetype
needs_recovery extent sparse_super large_file uninit_bg
Filesystem flags:         signed_directory_hash 
Default mount options:    (none)
Filesystem state:         clean
Errors behavior:          Continue
Filesystem OS type:       Linux
Inode count:              19519488
Block count:              624605184
Reserved block count:     0
Free blocks:              257817321
Free inodes:              10481629
First block:              0
Block size:               4096
Fragment size:            4096
Reserved GDT blocks:      875
Blocks per group:         32768
Fragments per group:      32768
Inodes per group:         1024
Inode blocks per group:   32
Filesystem created:       Tue May  8 21:04:31 2007
Last mount time:          Wed Feb 25 18:01:47 2009
Last write time:          Wed Feb 25 18:01:47 2009
Mount count:              19
Maximum mount count:      -1
Last checked:             Sat Dec 27 23:16:47 2008
Check interval:           0 (<none>)
Reserved blocks uid:      0 (user root)
Reserved blocks gid:      0 (group root)
First inode:              11
Inode size:		            128
Journal UUID:             1a7063f5-8965-40f2-9feb-e37d6ac467e9
Journal device:		            0x6806
First orphan inode:       622943
Default directory hash:   tea
Directory Hash Seed:      44337061-e542-44bb-afb9-40597ccf1c6d
Journal backup:           inode blocks
dumpe2fs: Illegal inode number while reading journal inode

-- 
Ralf Hildebrandt                                Ralf.Hildebrandt at charite.de
Charite - Universitätsmedizin Berlin            Tel.  +49 (0)30-450 570-155
Geschäftsbereich IT | Abt. Netzwerk             Fax.  +49 (0)30-450 570-962
Hindenburgdamm 30 | 12200 Berlin