A quick test with a ~3.5MB ext4 filesystem shows that 1081 blocks isn't
enough:
tune2fs 1.42.7 (21-Jan-2013)
Please run e2fsck on the filesystem.
Creating journal inode:
Journal size too big for filesystem.
So bump it a bit. Overestimating the journal size is probably not really
a big deal for the kind of systems using ext3/4 anyway.
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>