The 73.4 GB 10,000 rpm SCSI disk drive is an excellent HDD that supports Ultra3 speed. This disk drive gives the system exceptional performance and storage while supporting industry-standard interface speeds of up to 160 Mbps. The drive also supports the Fast/Wide SCSI speeds of 20, 40, and 80 Mbps.The higher SCSI bus data rate along with the 10,000 rpm spinning speed of the disk platters can greatly improve a system's overall data throughput. This disk drive is a 3.5-inch diameter, 1-inch (25-mm) high form factor which allows it to be placed in dense system configurations.