The SAS 5/iR PCI Express RAID Adapter from Dell is used to connect internal hard drives in Precision WorkStation 390. SAS 5/iR utilizes high performance SAS 3 Gb/s technology to connect to the hard drives, and the latest generation of host interface technology, PCI Express (PCI-E). The SAS 5/iR supports only internal disks and provides integrated capability for RAID levels 0 and 1. The SAS 5/iR uses SAS RAID Storage Manager, and can be configured using the Ctrl-C BIOS utility.