LTO-1 offered 100 gigabytes (GB) native capacity (200 GB compressed) and a native transfer speed of 20 megabytes per second (MBps) or 40 MBps compressed. LTO-1 was the first LTO magnetic tape to serve as an open standard substitute to the available formats of the day.
The Consortium has since released LTO-2 in 2002, LTO-3 in 2005, LTO-4 in 2007, LTO-5 in 2010, LTO-6 in 2012 and LTO-7 in 2015. The LTO-8, LTO-9 and LTO-10 tape formats have been announced, but there are no release dates scheduled as of October 2015.
LTO tape format specifications
LTO-2 offered 200 GB capacity (400 GB compressed) and 40 MBps throughput (80 MBps compressed), doubling the speed and capacity of LTO-1. Capacity and data transfer rates for LTO-2 assume a 2:1 compression ratio.
LTO-4 doubled capacity to 800 GB native capacity or 1.6 terabytes (TB) compressed and boosted transfer rates to 120 MBps (240 MBps compressed). LTO-4 had 256-bit Advanced Encryption Standard-Galois Counter Mode drive-level encryption.
LTO-5 boosted native capacity to 1.5 TB (3 TB compressed) and data transfer rates to 140 MBps (280 MBps compressed) with a 2:1 compression ratio.
LTO-6 features 2.5 TB native capacity (6.25 TB compressed) with native sustained data transfer rates as high as 160 MBps (400 MBps compressed).
LTO-7 offers 6.4 TB native capacity (15 TB compressed) with native sustained data transfer rates of 315 MBps (788 MBps compressed).
LTO-8 draft specifications call for 12.8 TB native capacity (32 TB compressed) with native sustained data transfer rates as high as 472 MBps (1,180 MBps compressed).
The projected LTO-9 specifications are 26 TB native capacity (62.5 TB compressed) and 708 MBps throughput (1,770 MBps compressed).
LTO-10 planned specifications call for 48 TB native capacity (120 TB compressed) with 1,100 MBps throughput (2,750 MBps compressed).
Capacity and data transfer rates for LTO-5, LTO-6, LTO-7, LTO-8, LTO-9 and LTO-10 assume 2.5:1 compression ratios.