SLR 40 has an uncompressed capacity of 20 GB / compressed 40 GB, minimum tape length of 1,515 feet. Up to 192 tracks. Recording density (ftpi) of 77,343. Pre-formatted for Servo Track. Compatible with Imation SLR40. 5 ?" SLR data cartridges protect valuable data and provide increased storage capacity for entry-level to small servers and workstations. Take full advantage of the extra speed and capacity that gigabyte data cartridge drives offer. Scalable Linear Recording (SLR) technology allows past generation media to be read/write compatible with future generation drives. Read-while-write capability in SLR technology allows transfer rates up to 10.MB per second with 2:1 data compression. Lifetime-of-the-product warranty. 40 GB capacity.