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KZQSA SCSI device compatibility?

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The Question is:

I have a MicroVAX 3400 with a ka640-a processor and a kzqsa SCSI adapter.
 Firmware shows v5.3, vmb 2.7.
The kzqsa sees the tape drive attached, but in attaching an external rrd43
 cd-rom drive, it doesn't seem to see it.  I have verified that the kzqsa is
 set to factory addresses... can the rrd43 be used in this system?  What am I
 missing, please?
Thank you!
Becca Putman

The Answer is :

  The KZQSA is supported for specific SCSI-1 devices, and only in very
  limited device configurations.  It is not suited as a generic SCSI-1
  adapter.  The controller is sensitive to the speeds of the particular
  SCSI devices, and to the signal integrity of the bus.
  As you do not identify the tape device, please contact your hardware
  support organization for assistance.  Expect to be asked details of
  the configuration.
  Existing discussion topics include (2004), (2545), (2648) and (5780).
  As stated elsewhere, a more generic solution is the HSD05 or HSD10
  series controller, but the OpenVMS Wizard would tend to replace this
  (ancient) VAX system with a slightly more recent (used) VAX system
  (and particularly one with native SCSI support), or with a more recent
  (new or used) Alpha or Integrity system.  Most any VAX system you will
  acquire will be faster than the KA640 MicroVAX 3400 series, of course.

answer written or last revised on ( 17-DEC-2003 )

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