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                            
mke2fs: Invalid argument while zeroing block 1073741808 at end of filesystem
Writing inode tables:            done                            
Creating 1 huge file(s) : done
Writing superblocks and filesystem accounting information:            done

The filesystem size (according to the superblock) is 1073741824 blocks
The physical size of the device is 131072 blocks
Either the superblock or the partition table is likely to be corrupt!
Abort? no

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