Chris Bartram writes:
 
>We've had this problem on a dat drive where the right led blinks alternating
>yellow then green constantly after doing a full backup. It's done it on
>several different tapes (like 4 or so) and keeps flashing after other tapes
>are inserted... inserting a cleaning tape stops the blinking so I guess it
>must be tape related, but too many tapes (all HP 60M tapes only used once
>or twice) are hitting it.
 
We had this same problem a while ago.  It required a service call from HP to
fix it.