1 mke2fs -F -T hugefile test.img 4T 2 Creating filesystem with 1073741824 4k blocks and 1048576 inodes 3 Superblock backups stored on blocks: 4 5 Allocating group tables: done 6 Writing inode tables: done 7 Creating 1 huge file(s) : done 8 Writing superblocks and filesystem accounting information: done 9 10 Pass 1: Checking inodes, blocks, and sizes 11 Pass 2: Checking directory structure 12 Pass 3: Checking directory connectivity 13 Pass 4: Checking reference counts 14 Pass 5: Checking group summary information 15 16 Exit status is 0 17 debugfs -R "extents /store/big-data" test.img | head 18 Level Entries Logical Physical Length Flags 19 0/ 2 1/ 1 0 - 1073610751 131070 1073610752 20 1/ 2 1/ 97 0 - 11108351 131071 11108352 21 2/ 2 1/339 0 - 32767 131072 - 163839 32768 22 2/ 2 2/339 32768 - 65535 163840 - 196607 32768 23 2/ 2 3/339 65536 - 98303 196608 - 229375 32768 24 2/ 2 4/339 98304 - 131071 229376 - 262143 32768 25 2/ 2 5/339 131072 - 163839 262144 - 294911 32768 26 2/ 2 6/339 163840 - 196607 294912 - 327679 32768 27 2/ 2 7/339 196608 - 229375 327680 - 360447 32768 28 2/ 2 8/339 229376 - 262143 360448 - 393215 32768 29 2/ 2 9/339 262144 - 294911 393216 - 425983 32768 30 2/ 2 10/339 294912 - 327679 425984 - 458751 32768 31 2/ 2 11/339 327680 - 360447 458752 - 491519 32768 32 2/ 2 12/339 360448 - 393215 491520 - 524287 32768 33 2/ 2 13/339 393216 - 425983 524288 - 557055 32768 34 2/ 2 14/339 425984 - 458751 557056 - 589823 32768 35 2/ 2 15/339 458752 - 491519 589824 - 622591 32768 36 2/ 2 16/339 491520 - 524287 622592 - 655359 32768 37
