Hugh,

I suspect that you might never find the information in the format you
expect.

Technology companies tend not to define failure in such black and white
terms. Rather media such as hard disks are measured in terms of failures
over time.

As conditions worsen the reliability decreases, but people tend to leave
the threshold of failure to be interpreted within the scope of the
application.
After all this is the rational behind RAID arrays; that is using less
reliable disks with an expectation that one but not all will fail.

If you can not find anything I would be happy to help you cook a few tapes
for the betterment of mankind.

Gerard

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