SCSI Device Current Data Transfer Speed. The following values are defined: other(1) The agent is unable to determine the current negotiated data transfer speed for this drive. asynchronous(2) The negotiated data transfer speed for this drive is asynchronous. fast(3) The negotiated data transfer speed for this drive is 10 million transfers per second. ultra(4) The negotiated data transfer speed for this drive is 20 million transfers per second. ultra2(5) The negotiated data transfer speed for this drive is 40 million transfers per second. ultra3(6) The negotiated data transfer speed for this drive is 80 million transfers per second. scsi1(7) The negotiated data transfer speed for this drive is 5 million transfers per second. ultra4(8) The negotiated data transfer speed for this drive is 160 million transfers per second. Ultra4 is now referred to as Ultra320.