9-track on Sun-4/490

[Barbara Fraser]

We have put a Xylogics 472 controller and CDC 9-track tape drive on one of
our Sun-4/490s running SunOS 4.1.  The controller board is in slot 7 and
we are able to use the drive.  However, we are getting the following error
messages:

Aug  9 18:10:17 xx10 vmunix: xt0: stray interrupt
Aug  9 18:10:17 xx10 vmunix: spurious VME interrupt at processor level 5
Aug  9 18:10:17 xx10 vmunix: VME level 3, VME vector 0xffffffff
Aug  9 18:10:17 xx10 vmunix: spurious VME interrupt at processor level 5
Aug  9 18:10:17 xx10 vmunix: VME level 3, VME vector 0xffffffff
Aug  9 18:10:17 xx10 vmunix: spurious VME interrupt at processor level 5
Aug  9 18:10:17 xx10 vmunix: VME level 3, VME vector 0xffffffff
Aug  9 18:10:17 xx10 vmunix: spurious VME interrupt at processor level 5
Aug  9 18:10:17 xx10 vmunix: VME level 3, VME vector 0xffffffff
Aug  9 18:10:17 xx10 vmunix: xt0: stray interrupt

While Sun doesn't officially support the 9-track drives on its
SPARCServers, has anyone out there used them without getting these error
messages?  Is there something we've missed?  

  Thanks,
  Barbara Fraser
  Software Engineering Institute
  Carnegie Mellon University
  byf at sei.cmu.edu