Daisy chaining tape drives trouble

[Mencaraglia Francesco]

THIS IS BRIEFLY THE PROBLEM :
COMPUTER : MASSCOMP MC5300 RUNNING UNDER (OLD) RTU 3.21B ;
COUPLER  : XYLOGICS 472
DRIVES   : CYPHER 880 AND CYPHER 990 DAISY CHAINED.

IN THIS CONFIGURATION I DO NOT SUCCED IN USING THE 880 DRIVE AS I ALWAYS
GET THE ANSWER XMT1 OFF LINE ( NOTE : ALL FILE MT0 AND MT1 HAVE BEEN
MKNOD'ED IN /DEV ).

I THINK THAT PROBABLY I AM MAKING SOME MISTAKE IN THE DRIVE CONFIGURATION
AS THE DRIVES WERE 'WITHDRAWN' FROM A MVAX WERE THEY WERE KNOWN AS MSA0
AND MSB0 ; SO PROBABLY THEIR UNIT NUMBER IS SETTED TO 0 AND THEY ARE
RECOGNIZED BY VMS BY THE FORMATTER ( A OR B ) ; AS I AM NOT AN 'HARD-
WARE-MAN' , BEFORE I DESTROY EVERYTHING HAS ANYONE A GOOD SUGGESTION?

PLEASE E-MAIL AS I AM NOT A CURRENT SUBSCRIBER TO THE NET

             HAPPY CHRISTMAS AND NEW YEAR TO ALL

                                            FRANCESCO