--- emanuel stiebler <emu_at_ecubics.com> wrote:
> >On May 3, 20:49, John Lawson wrote:
> >
> >> Anyway.. this particular Emulex Unibus board has the model number
> >> SCO210101-CXL sub number 4039 H. The abovementioned website lists
> >> a part number of SCO2 as a "Unibus Disk Controller"
>
> Nope, it is a Q-Bus ...
>
> think you mean one
> >60-pin and two 26-pin (not 36) connectors. There are several versions of
> >the firmware for SC02s, emulating different DEC drives.
>
> Emulates RL01 & RL02, or better said the RLV11/RLV12 controller. On bigger
> disks, the controller maps up to four logcal units per disk
>
> BTW, if anybody know where to get some of the disks, that fits to this
> controller, i would be interested ...
The disks you are looking for are SMD disks - 60 pin digital cable for all
drives, 26-pin data cable for each drive. Yours must support two physical
units.
I have used 14" (RA-81-sized) disks like the Fujitsu Eagle and have seen 5.25"
disks, but never used them. I know that SMD disks are available in the 600Mb
range. I don't know how small they get. I can't imagine how you'd map
hundreds of megabytes into several dozen RL02 images, but in the interest of
compatibility, I guess they'd have to do it.
On VAXen and PDP-11's, I've always used a Systems Industries 9900 controller
to attach Fuji Eagles (and some other sizes) to the Massbus. I have an SI
Q-bus controller that appears to talk to the 9900 (dual 40-pin connectors),
but I've never used it. I have KDA-50's now (and wish I had docs for the
CS-21 SCSI card).
Bottom line - SMD disks are hard to find, but they are out there.
-ethan
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Received on Tue May 04 1999 - 09:07:58 BST