Starting in release 6.1, 64-bit quotas are supported on disk layout Version 10. To use this feature the existing file systems need to be upgrade to disk layout Version 10 using the vxupgrade command.

See vxupgrade(1M) man page.

As for 32-bit quotas, this continues to be supported on disk layout Version 9 or earlier. The same quota commands can be used for both 32-bit and 64-bit quotas.

As for 64-bit quotas, there are two new quotas files. For group quotas the file name is quotas.grp.64 and for user quotas the file name is quotas.64. These files will be created on each file system after the disk layout version upgrade is completed.