I think it can do 16 exabytes. What they don't tell you is that NT cannot boot from a partition that is larger than 4GB. An odd 'feature' considering the size of most drives. Yeah, when NT came out they weren't that large, but it does with RAID. It gets over 4GB very quickly that way. So, you're stuck with multiple partitions of the same drive and NT doesn't mount/,/usr, etc - it is C, D, all separate drives.
I think it can do 16 exabytes. What they don't tell you is that NT cannot boot from a partition that is larger than 4GB. An odd 'feature' considering the size of most drives. Yeah, when NT came out they weren't that large, but it does with RAID. It gets over 4GB very quickly that way. So, you're stuck with multiple partitions of the same drive and NT doesn't mount /, /usr, etc - it is C, D, all separate drives.