mke2fs -F -T hugefile test.img 4T
Creating filesystem with 1073741824 4k blocks and 1048576 inodes
Superblock backups stored on blocks: 

Allocating group tables: done                            
Writing inode tables:            done                            
Creating 1 huge file(s) : done
Writing superblocks and filesystem accounting information:            done

Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
test_filesys: 13/1048576 files (0.0% non-contiguous), 1073709417/1073741824 blocks
Exit status is 0
debugfs -R "extents /store/big-data" test.img
Last logical block: 1073610751
Last physical block: 1073741823