VxFS disk layout Version 6 is similar to Version 5. Structural files in Version 6 are the same in Version 5. The Version 6 disk layout can theoretically support files and file systems up to 8 exabytes (263). For a file system to take advantage of VxFS 8-exabyte support, it must be created on a Veritas Volume Manager volume. For 64-bit kernels, the maximum size of the file system you can create depends on the block size:
If you specify the file system size when creating a file system, the block size defaults to the appropriate value as shown above.
mkfs(1M) manual page.
The Version 6 disk layout also supports group quotas.
See About quota files on Veritas File System.