Linear Tape-Open (LTO) is a tape storage technology collaboratively developed by HP, IBM and Seagate Technology.
LTO-4 has been available since summer 2007 and offers a capacity of 800 GB (1.6 TB compressed) and a transfer rate of 120 MB (240 MB compressed) per second.
LTO-4 was the first LTO tape format to include drive-level encryption with 256-bit advanced encryption.
The LTO-4 generation doubles the capacity of the LTO-3 generation.