Solaris 10 1/06: You can use the following USB features in the GRUB-based booting environment:
Installing from USB CD or DVD drives
Booting from USB storage devices. You must install the Solaris release on the USB drive before you can boot from it.
For more information about GRUB-based booting, see Chapter 9, Shutting Down and Booting a System (Overview), in System Administration Guide: Basic Administration.