Starting with LTO-8, changes were made to LTO’s backwards compatibility. Previously, LTO drives could read tapes from two generations back and write to tapes from the previous generation. For instance, an LTO-7 drive could read LTO-7, LTO-6, and LTO-5 tapes, as well as write to LTO-7 and LTO-6 tapes. However, this two-generation backward reading compatibility ceased with LTO-8. An LTO-8 drive can read and write only LTO-8 and LTO-7 tapes, without compatibility for reading LTO-6 tapes. Similarly, an LTO-9 drive can read and write LTO-9 and LTO-8 tapes but cannot read LTO-7 tapes.

  • LTO drive generations 1-7 are able to read tapes from two generations prior and are able to write to tapes from the prior generation.
  • LTO-8 drives can read and write to LTO-7 and LTO-8 media, including
    LTO-7 Type M.
  • LTO-9 drives can read and write to LTO-8 and LTO-9 media only.

In the table below, we summarise the situation.

LTO Drive GenerationCan ReadCan Write
LTO-1LTO 1LTO 1
LTO-2LTO 2,1LTO 2,1
LTO-3LTO 3,2,1LTO 3,2
LTO-4LTO 4,3,2LTO 4,3
LTO-5LTO 5,4,3LTO 5,4
LTO-6LTO 6,5,4LTO 6,5
LTO-7LTO 7,6,5LTO 7,6
LTO-8LTO 8,7 (including
LTO-7 Type M)
LTO 8,7 (including
LTO-7 Type M)
LTO-9LTO 9,8LTO 9,8
LTO-10TBATBA

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LTO Tape – Backwards Compatibility
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