  KZPBA and boot failure? 
 The Question is:
 
Is there any difference between the KZPBA-CA and KZPBA-CX SCSI controller?  Are
 both supported under OpenVMS 7.2 on the DEC Personal Workstation 600au?  The
 reason I ask is because my card is stamped KZPBA-CX and whenever I try to boot
 from the hobbyist 7
.2 CD (using an RRD45) it hangs.  When I boot in debug mode, i.e.,
 
&gt;&gt;&gt; boot -flags 0,10000 dka100
 
it hangs after displaying the line
 
%SWAPPER-I-SYSDISK, checking status of system disk
 
Thanks in advance for any help you can give.
 
 
 The Answer is:
 
  Your SCSI bus initially appears to have a problem.
 
