12/24GB DDS/3 4mm Internal SCSI Tape Drive features the world's most popular tape format, with IBM service and support behind it. This industry-leading, state-of-the-art internal tape drive is low cost-per-megabyte 4mm tape solution with up to 7.2GB per hour using 2X compression. Also read/write compatible with DDS/2, DDS-DC and DDS tape formats (can be configured as either a 3.5" or 5.25"), protecting your investment while realizing enhanced performance. Simply install inside a 3510-020 for a cost effective, flexible external solution.