Take a look at this:

"Unrecognized Media" Hotfix for BENT v7.3 b.2575, v8.0 b.3316 and v8.5
b.3571 ONLY! [ALPHA/INTEL cpu's]
TechFile ID: 234341

"Andy Fordyce" wrote in message
news:3d4ffe20$1@hronntp01....
> I am running Backupexec V8.5 on a NT server. An issue has occurred where
> media is noted as bad. I have tried new tapes and the error still occurs.
> It even appears when trying to erase the tapes. I am really stuck, can
> anyone please help?
>
>