I was going through Journaling and JBD and wanted to ask you a very basic question for which I was not getting an answer: 1.Why Journal Inode number comes as 8 when we do ./dumpe2fs? 2.So far my understanding is Ext3 deals with transactions and JBD works on the journaling. I understand basics of Journaling and JBD but still  where on disk partition do we store journaled blocks? When we see the on-disk layout of file system  we dont see any block reserved for Journaling? Do we store it as a regular file? Where after/before super block, before bitmaps - just want to understand it. Below is what ./dumpe2fs shows: Journal inode: 8 Journal size: 128M Journal length 32768 Journal Start: 0 Journal Sequence: 0x00000001I looked over few questions on web but didn't get the answers.
Ext3 Journaling Question on inode and disk layout
linux;filesystems;ext3;journaling