Looking to read past EOT on DDS/DLT/LTO

Eric Smith spacewar at gmail.com
Wed Jan 25 16:16:09 CST 2017

On Jan 25, 2017 12:24 PM, "Stan Sieler" <sieler at allegro.com> wrote:
> We have a friend with a "tape" (DDS, DLT, or LTO ... don't know which yet)
> to which was written a system backup.  Thousands of files, with an EOF
> between each file, and a double EOF + EOT at the end.
> The problem:
> They then accidentally overwrote the start of the tape yesterday
> with about 1 KB of data, plus EOT.

I hope someone can prove me wrong, but I think that short of a major effort
to hack the drive firmware, the data is gone. Modern tape drives are "too
smart" to allow reading past logical EOT, and the tape format is too
complex to allow fooling the firmware by any simple means.

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