erd
Experienced Member
Given the growing discussion of Unibus SCSI over in the "Wanted" section, I thought I'd maybe try and drag it over here...
I have a wide variety of PDP-11 cabinets and CPU boards (a DataRAM 11/23 clone, a Heath H-11, Professional 350s, a Professional 380, 11/20, 11/05, 11/04, 11/03s, 11/23s, 11/23+s, 11/24s, 11/34s, 11/44, 11/70s), but relatively few disk controllers.
The "modern" machines all have RQDX3s or, in the case of the Pros, the CTI-bus equivalent. I collect ST-225s and ST-241s when possible, but unless I run across an RD53 or RD54, those systems are somewhat limited. The older machines have either an RL11, RLV11, RLV12 or, in a few cases, an RK11 or RKV11. Again... not much room.
An RD54 is enough room to play with on a Qbus PDP-11, but that leaves the Unibus machines out in the cold (the 11/70s have MASSBUS disk and plenty of it - if only I had the power in the quonset hut to spin a rack of Fuji Eagles).
So... with all of that intro... what Unibus disk interfaces are people using for machines in the 11/24 and 11/44 class? Some model of Emulex SMD controller? An RH-11 with DEC RM or RP disks? UDA-50 w/SDI disks? Home-built IDE?
-ethan
I have a wide variety of PDP-11 cabinets and CPU boards (a DataRAM 11/23 clone, a Heath H-11, Professional 350s, a Professional 380, 11/20, 11/05, 11/04, 11/03s, 11/23s, 11/23+s, 11/24s, 11/34s, 11/44, 11/70s), but relatively few disk controllers.
The "modern" machines all have RQDX3s or, in the case of the Pros, the CTI-bus equivalent. I collect ST-225s and ST-241s when possible, but unless I run across an RD53 or RD54, those systems are somewhat limited. The older machines have either an RL11, RLV11, RLV12 or, in a few cases, an RK11 or RKV11. Again... not much room.
An RD54 is enough room to play with on a Qbus PDP-11, but that leaves the Unibus machines out in the cold (the 11/70s have MASSBUS disk and plenty of it - if only I had the power in the quonset hut to spin a rack of Fuji Eagles).
So... with all of that intro... what Unibus disk interfaces are people using for machines in the 11/24 and 11/44 class? Some model of Emulex SMD controller? An RH-11 with DEC RM or RP disks? UDA-50 w/SDI disks? Home-built IDE?
-ethan