As others have said there is no fsck (and other important stuff) for 64-bit based ext4 which is needed for > 16TiB support.
I am very aware of this issue. The *only* two native/mature linux file-systems which support > 16TiB support are JFS and XFS.
I don't consider btrfs as its not considered stable nor do I consider ZFS as its not really native linux.
I personally use JFS on my system:
root@dekabutsu: 04:37 AM :~# df -H
Filesystem Size Used Avail Use% Mounted on
rootfs 129G 90G 40G 70% /
/dev/root 129G 90G 40G 70% /
udev 11M 238k 11M 3% /dev
/dev/sda1 129G 78G 52G 61% /winxp
/dev/sdd1 36T 29T 7.5T 80% /data
/dev/sde1 84T 23G 84T 1% /data2
tmpfs 13G 0 13G 0% /dev/shm
root@dekabutsu: 04:37 AM :~#
The reasons I don't use XFS:
*Has a reputation for losing data during a power interruption (and I personally have had this happen).
*I have heard it requires 1 GB of ram for the fsck for each TB of data.
*Lots of bugs back when I used it (kernel panic when to fragmented, accessing a specific file,etc..)
*Relatively slow fsck times (atleast from what I have experienced).
Now some of the issues have been from previous experience from atleast 4 years ago I am sure in multiple aspects its better now but needless to say I don't really trust XFS with my data anymore.
The reasons I use JFS:
*hardly any memory usage for fsck.
*fsck is very fast (much faster than ext3). It takes around 12-13 minutes for my 36 TB volume to fsck. This is mainly dependent on what the inode usage/number of files/directories on the file-system). In my case this is 6 million as i store very large media files.
*Very fast. Just like XFS it gives near raw disk I/O performance. XFS might be just slightly faster on this front.
*Low CPU usage. Uses less CPU usage than any other file-system AFAIK.
*I have been running JFS for many years now on very large file-systems. I have yet to have data loss when the file-system was not unmounted cleanly due to powerloss, kernel panic, or any other options.
So your only real choices are pretty much between those two (IMHO).