Compaq Ultra3 SCSI hard drives provide a maximum data transfer rate of 160MBps, twice the rate of Ultra2 systems. These Universal Hard Disk Drives provide the ability to hot-plug between various Compaq Ultra3 and Ultra2 SCSI platforms. All Compaq Hard Disk Drives are required to meet their rigorous standards for reliability and performance. These drives are intended for use in today's demanding, data-critical enterprise environments. Universal option kits are configured and pre-mounted in the appropriate hot-plug tray for immediate installation into your Compaq server or storage system.