The Compaq 122872-001 12/24-GB DAT DDS-3 8 Cassette autoloader includes an integrated 12/24-GB DAT Drive and changer mechanism with convenient access to a 8 cassette magazine, allowing you to devise an automatic tape rotation scheme for scheduled backups of servers 24 GB or less. Reliability is enhanced over previous DAT autoloaders with a new mechanism that offers automated internal head cleaning to sweep away debris. This reliability is noted with a 200, 000-hour mean time between failure rating at an 20% duty cycle. Industry Standard DDS-3 format has a drum rotation speed of 3825 rpm while the tape moves at 10.4 mm/s.