The Adaptec 2120S & 2200S RAID controllers feature Ultra320 SCSI and data transfer rates up to 320 MByte/sec on each channel. This performance increase is especially significant in storage systems performing large data transfers or connecting many drives on a single channel. Adaptec developed a new technology called Seamless Streaming? to optimize Ultra320 performance, maximizing bus utilization and minimizing command overhead as multiple commands are transferred in a single connection and at higher speeds.