Apple is now shipping Xsan, Apple's new Storage Area Network (SAN) software. This software will allow multiple users to read and write to large high-speed shared SAN systems, including SANs using Apple's own XRAID.
Xsan is apparently based upon ADIC's StorNext File System drivers, but integrates Apple's versions of the SAN management applications. In fact, Xsan networks are advertised to have complete interoperability with Windows and Unix machines using ADIC's StorNext drivers.
Pricing for Xsan is relatively inexpensive, at US$999 per node.