Curt Sampson writes:
> 
<...>
> Now the other day one of the Quantum drives, sd3, which just happens
> to be part of my news spool, started producing errors of the form
> 
>     sd3(bt0:4:0): medium error, info = 3878640 (decimal),
> 	data = 00 00 00 00 11 00 00 00 00 00
<...>

This happened to me on a Quantum drive.  Eventually, it was completely
toast.  Make backups now.

Mark