We use predominantly Dell servers with FreeBSD or Windows 2003 operating systems, all of which have dual Intel Pentium Xeon processors, dual 100Mbit Ethernet adapters and a minimum of 2 gigabytes of memory. Storage is spread across multiple Ultra 160 SCSI hard disk drives using Adaptec RAID controllers.
Every server on our network runs a RAID based disk redundancy solution, should any of the primary disk drives fail, a secondary disk drive can take over the work load with no loss of availability. Each server also has a replication partner which can take over its workload in the event of a problem or during planned maintenance. In addition, data on our servers is backed up to our Storagetek Timberwolf DLT tape library with tapes being stored off site.