I have only heard of success with XP 64-bit and 3TB drives. And 2TB or less for XP 32-bit, and of which the motherboards BIOS also has to support the large capacity for any OS!
With one of my builds a few years back that was XP 32-bit Professional with a 1TB HDD, I ended up creating 2 partitions C: and D: 500GB each and went this path vs a full 1TB partition for the OS, but then I bought a 3-license Windows 7 upgrade and this system was rebuilt and 1TB drive swapped for a 500GB and the 1TB then went into an external enclosure to be used for backing up data vs having large amounts of data spinning on C: every day.
So I have downgraded to smaller capacity system drives lately to keep my systems running on the bare minimum software and games installed vs years past when I would have a system jam packed with games I bought and the 10-20GB free to play games etc and it made for a cluttered system.
Running now on low capacity cheap SSD's 30GB, 40GB, and 60GB as my C: drive on 3 systems and 250GB and 500GB D: HDD's for fast performance and to force myself to keep the builds clean of clutter. The important data is stored to the HDD's vs the SSD's. As well as read/write intensive operations are performed on the HDD's.
Edited by goldfist, 09 January 2014 - 10:02 PM.