IBM, 3592JA 300/900GB, Data Tape, P/N 18P7534 IBM?s tradition of innovative tape technology continues by maximizing the capacity of the Cartridge System Tape with the IBM 3592 cartridge tapes. IBM?s robust 3592 tape cartridge offer 300 GB uncompressed capacity and when processed at a 3:1 ratio can offer up to 900 GB of compressed capacity offering an uncompressed transfer rate of 104MB per second.