Can I use a single filesystem on a drive that is larger than 1TB?
PSARC 2008/336 added the plus1TB project to support booting on disks > 1 TB. This makes it possible to use UFS or pcfs on drives up to 2TB in size on systems running a 64 bit kernel. This Feature is available in the OpenSolaris 2008.11 release and will be in a future update of Solaris 10. For systems running older releases of Solaris 10 or OpenSolaris, you can use the entire drive as a ZFS volume instead.