Overview: The 20/40GB DAT DDS-4 8 Cassette Autoloader is perfect when you need to backup your servers ranging from the workgroup to departmental server environments. Compaq 20/40GB DAT DDS-4 Autoloader is a tape drive inside of an enclosure that holds a magazine with eight data cassettes or seven data cassettes and a cleaning cassette. With these configurations native capacity can range from 140GB to 160GB; with a 2:1 compression ratio the capacity increases with up to 320GB of storage capacity. Autoloaders are intended for Low Administrative Backups which means you load the magazine and the software does the rest for an entire week. Meaning the tape drive will perform a total system backup on the first day incremental backups on day two through seven and a cleaning on day seven. This ensures the most current data in a reduced backup window situation. The software is configurable in many ways to meet your backup demands; this is only a sample configuration.