On 24 January 2018 at 16:33, Jack Harper via cctalk <cctalk@classiccmp.org> wrote: > > Hello Plamen - > > I use the SCSI controller that is built into the MVME177 transition module. > > No, when I RESET the system, I just press the RESET button on the processor > board - usually when it is hung with my software. On this system, I only > code in 68K assembly and so I do see the "occasional" hang :) > > Is the "SCSI reset option" part of the 68K/BUG RESET command? > > In my documentation - and I easily may not have the latest documentation - I > only see RESET options to force a COLD or WARM start on hardware RESET. > > The documentation that I have also cautions: "...may cause the disk > controller to be out of phase with respect to the disk configuration tables > in memory", which certainly makes sense. > > However, I do not modify any of those tables from system default. > > I appreciate your input. >
Do you have any other software you can use to test the hardware - if it experiences the same issues then you know its hardware related. I think NetBSD supports the MVME177 board ( http://www.netbsd.org/ports/mvme68k/boards.html#MVME177%20family ) I'm sure there are others. You also mention you have multiple VME boards in the cage and multiple SCSI drives. Does the issue occur when you strip everything down to a single board set and drive? (*) Theoretically other CPU boards may not be able to affect the SCSI, but a near first rule of hardware strangeness is to pull everything thats not needed so you can be sure :) David