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LTO-4
o First mechanisms approved in April 2007.[15] First media approved in May 2007.
o Doubled capacity again to 800 GB.
o Increased data transfer rate to 120 MB/s (maximum).
o Introduced drive level encryption feature using 256-bit AES-GCM .
LTO-5
o Specifications announced January 19, 2010. The first LTO-5 drives appeared on the market in Q2, 2010
o Nearly doubled capacity to 1.5 TB (1500 GB)
o Increased data transfer rate to 140 MB/s (maximum).
o Introduced partition feature that allows tape to be "split" into 2 separately writable areas. This feature is required by LTFS
