Definition

LTO-1 (Linear Tape-Open 1)

Contributor(s): Ed Hannan

LTO-1 was the first tape format released by the Linear Tape-Open (LTO) Consortium in 2000.

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-3 doubled native capacity to 400 GB (800 GB compressed) and transfer rates to 80 MBps (160 MBps compressed). It was the first LTO format to feature write once, read many (WORM) technology.

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.

This was last updated in October 2015

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What did you do with your LTO-1 tapes when you moved to a newer LTO tape format?
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