The 2in1 PC is a hardware based security device developed by Voltaire Advanced Data Security. The 2in1 PC is an ISA slot PC card that provides a single PC the ability to securely access two physically separate networks, a Public (B) and a Secure (A) network. This security is achieved through the use of a hardware based security controller that manages the PC's connectivity between the two networks and the hard disk partitions associated with each network.
The 2in1 PC operates on a single AT compatible PC running MS-DOS, Microsoft Windows 3.x, Windows 95, Windows 98, Windows NT (Versions 3.1 and 4), OS/2, SCO and LINUX operating systems. The PC must include either one or two IDE-ATA compatible hard drives. If the host PC consists of only one hard drive, then the following disk partitions are created during the installation, a Transition, Public (B), Secure (A) and an optional partition labelled Functional. If the host PC consists of two hard drives, then the first disk, the master, includes the same partitions as in the one disk configuration while the second disk, the slave, is solely dedicated as an extension to either the Public (B) or the Secure (A) disk partition.