What does a TapeAlert report look like?

This is what the SANtools software returns as it polls tape drives & autochangers
If you invoke SMARTMON-UX with the -X option, it will poll tapes at  the specified polling periods and produce a message such as:
       \\.\TAPE0 polled at Sun Aug 18 23:19:21 2002 Status:Passed
 
If there was a problem, you might see:
    [...]

TapeAlert error flags for tape drives and libraries

Below is a list of Industry Standard Tape Alert Error Flags. These “tape alert” flags are designed for single tape drives and robotic libraries.