SCSI replacements (was Re: Data General computer)

I bought a SCM PCD-50B SCSI Card Reader from http://a4000t.com for $62 plus shipping. So far I have been unable to get it to work with either a DEC VS3100 M76 or an InfoServer 1000. I was able to get it to work with a CMD CQD-220/TM in a PDP-11/73 system with RT-11 and XXDP 2.5. Haven't tried RSTS/E or 2.11BSD yet. I have EPROM firmware versions F220Y1A8 / F220Y2A8 on my CMD CQD-220/TM. The device configuration menu allows you to specify the SCSI ID and LUN for each logical drive. For example you can specify LUN 1 for the Compact Flash slot of the SCM PCD-50B. With the CMD CQD-220/TM I found that I had to disable Synchronous mode for the SCM PCD-50B or I would get errors. The first example output below shows the CMD CQD-220/TM configuration with Synchronous mode enabled and an error that occurs when booting XXDP from RD45 configured as DU1: and attempting to copy files to the SCM PCD-50B Compact Flash slot configured as DU0: The second example output below shows the CMD CQD-220/TM configuration with Synchronous mode disabled. In this configuration no errors occur when booting XXDP from RD45 configured as DU1: and copying files to the SCM PCD-50B Compact Flash slot configured as DU0: I was then able to successfully boot from the Compact Flash slot of the SCM PCD-50B and successfully run XXDP 2.5 diagnostics. FAILURE: -------- SCANNING SCSI DEVICES ATTACHED ... DEV0: DU0 SCSI ID 0 LUN 1 SCSI Compact Flash 1.28 Disconnect ON,Sync Mode ON,Prevent Medium Removal ON,Write W/Verify OFF, DEV1: DU1 SCSI ID 1 LUN 0 DEC RRD45 (C) DEC 0436 Disconnect ON,Sync Mode ON,Prevent Medium Removal ON,Write W/Verify OFF, DEV2 NOT AVAILABLE DEV3 NOT AVAILABLE DEV4 NOT AVAILABLE DEV5 NOT AVAILABLE DEV6 NOT AVAILABLE DEV7 SCSI ID 7 HOST ADAPTER, SCSI Reset ON,Density Mode ON, CHANGE CONFIGURATION ? (Y/N) N BOOTING UP XXDP-XM EXTENDED MONITOR XXDP-XM EXTENDED MONITOR - XXDP V2.5 REVISION: F0 BOOTED FROM DU1 124KW OF MEMORY NON-UNIBUS SYSTEM RESTART ADDRESS: 152000 TYPE "H" FOR HELP ! .INITIALIZE DU0: USER DATA ON DU0 WILL BE DESTROYED ! PROCEED?(Y/N/CR=N)Y .COPY DU1:*.* DU0: XXDPXM.SYS XXDPSM.SYS DRSXM .SYS ?WT ERR SUCCESS: -------- SCANNING SCSI DEVICES ATTACHED ... DEV0: DU0 SCSI ID 0 LUN 1 SCSI Compact Flash 1.28 Disconnect ON,Sync Mode OFF,Prevent Medium Removal ON,Write W/Verify OFF, DEV1: DU1 SCSI ID 1 LUN 0 DEC RRD45 (C) DEC 0436 Disconnect ON,Sync Mode ON,Prevent Medium Removal ON,Write W/Verify OFF, DEV2 NOT AVAILABLE DEV3 NOT AVAILABLE DEV4 NOT AVAILABLE DEV5 NOT AVAILABLE DEV6 NOT AVAILABLE DEV7 SCSI ID 7 HOST ADAPTER, SCSI Reset ON,Density Mode ON, CHANGE CONFIGURATION ? (Y/N) N