Seagate’s has a new SATA6 3TB enterprise hard drive. The 3.5-inch, 7200RPM Barracuda XT ships with a 64MB cache and Seagate DiscWizard software that allows older computers to create a 3TB partition. The specialized software loads a driver for your 3TB hard drive so that it can be seen correctly by your older system. The ST33000651AS just started shipping at an $279 MSRP.
From the setup manual:
There are several capacity limitations that appear at 2.2TB.
Any systems built before 2011 and using a drive greater than 2.1TB will need
a device driver to access the terabytes above 2.1TB. DiscWizard software will
automatically detect and offer to install the appropriate driver for your Windows
OS and hardware (Windows 7, Visa or XP, 64- or 32-bit). The driver will mount the
remainder capacity above 2.1TB as a new drive letter, usually D:. This new drive is
also limited to a maximum of 2.1TB, so this will be repeated as necessary. A future
6.6TB drive will have three drive letters—C: managed by native Windows drivers;
D: and E: drives managed by the DiscWizard driver.
This is from the press release:
The Barracuda XT hard drive with free Seagate DiscWizard™ software is a complete, easy-to-deploy solution. DiscWizard software makes it simple to configure the computer operating system and device drivers to access the full 3TB of capacity on legacy systems using Windows XP and PC BIOS and on personal computers equipped with newer versions of Windows or the new UEFI BIOS. The new DiscWizard software is available for free download at http://www.seagate.com/www/en-us/support/beyond-2tb/.