[rescue] bulk erasing DLT tapes (or, more specifically, NOT)

[Richard]

In article <47CC36E0.1020608 at marknmel.com>,
    Mark Brown <sunrescue at marknmel.com>  writes:

> CAUTION CAUTION: Using the incorrect equipment or using equipment that 
> is not strong enough or not running through four times can cause partial 
> erasure, which results in errors. The drive may even fail.

How can this cause the *drive* to fail?
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