WiebeTech today announced it has added a 4-bay unit to its SilverSATA product line. The SilverSATA IV holds four 3.5″ SATA drives, with up to 750GB capacity for a total of 3TB (unformatted). Trays are removable and interchangeable with other SilverSATA models. Each drive tray has a dedicated connection to an eSATA host controller for highest speed performance. If using a software RAID utility, the SilverSATA IV can be configured to achieve speeds of over 200MB/s. WiebeTech also sells eSATA host cards for computers that do not have eSATA ports. The user configurable version of the SilverSATA IV retails for US$449.95, and with four 750GB drives, the price is $3109.95.