Tribe shipped with three NAS servers. One is used as a frontend that sits between the internet and the compute nodes.
The hardware of each of these systems is identical. Here are the specs:
The motherboard is a TYAN Thunder K8WE S2895.
The bios currently installed is from Phoenix Technologies version 2004Q3 Released 2006-03-14.
There are two dual-core AMD Opteron 265. These operate at 1.8Ghz and use socket 940.
There are four 1GB ECC dimms.
There is a single Areca ARC-1260 PCI-express 16-port RAID card. All 16 disks are attached through this card. It is currently running version 1.44 of the firmware, BIOS and boot software.
The manual for the ARC 1260 is available.