Phil Stracchino:
> Neither of these issues is applicable to LTO.  The compression algorithm
> (which is a pretty good one) is defined in the LTO specification, and
> the drive compresses data block-by-block, doing a trial compression of
> each data block and writing whichever is the smaller of the compressed
> and uncompressed version of that block to tape, flagging individual
> blocks as compressed or uncompressed.

In theory I agree, at least to the first point (I read the link from that 
other mail.)
In practice, I can remember at least one story about incompatibilities 
between different vendors, but never saw those problems on my own with LTO 
drives.

Are there conformance tests/statements for vendors defined in the spec?

regards,
        Dietz

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