1 Disable extra_isize feature since filesystem has 128 byte inodes.
2 Pass 1: Checking inodes, blocks, and sizes
3 Inode 12 has zero length extent
4 (invalid logical block 0, physical block 37)
7 Pass 2: Checking directory structure
8 Pass 3: Checking directory connectivity
9 Pass 4: Checking reference counts
10 Pass 5: Checking group summary information
12 test_filesys: ***** FILE SYSTEM WAS MODIFIED *****
13 test_filesys: 12/16 files (0.0% non-contiguous), 21/100 blocks