Interesting. The massbus adapters normally supported one drive per cage (I think the rm05 did two) I'll have to check it out
I would be happy to run my rm80 on the sc03 or uc03 controllers I have C On July 25, 2024 2:19:10 PM GMT+02:00, Nigel Johnson Ham via cctalk <cctalk@classiccmp.org> wrote: >I have never dealt with a massbus controller but have installed many 9762s on >Emulex controllers. One thing that the device that DEC put into the drive was >to do with sector and index. The bog standard drive comes with them on the A >cable, but in order to have multiple drives you have to move them on to the B >cable, which is where the controllers look for them. It is a tricky w/w job >on the card cage backplane of the drive. I no longer have the procedure. > >IIRC the transfer rate is 9.6608 MHz - but I may be worng on that, it has been >a few years! > >cheers, > >Nigel > > > >On 2024-07-25 07:02, Christopher Zach via cctalk wrote: >> I have always heard that Dec screwed with the smd spec. Maybe not? >> >> On July 25, 2024 12:41:57 PM GMT+02:00, Michael Thompson via >> cctalk<cctalk@classiccmp.org> wrote: >>> The CDC test system for the RM03 is a standard SMD device. You disconnect >>> the Massbus interface and connect the test system where the Massbus >>> interface was connected. So the drive interface is probably standard SMD. >>> The data transfer of the 9762 is fairly high, so it may not work with slow >>> controllers. >>> >>>> On Jul 25, 2024, at 5:59 AM, Christian Corti via >>>> cctalk<cctalk@classiccmp.org> wrote: >>>> >>>> Hello all, >>>> >>>> we now have a RM03 drive, but are missing all the cables and the RH11 >>>> backplane, though I have the cards. >>>> Since the drive itself is a CDC 9762 I was wondering if I could ignore the >>>> Massbus adapter in the drive cabinet and use the CDC as a "normal" SMD >>>> drive (at least it uses the standard 60+26 pin cables). >>>> There are no service manuals/schematics of the drive itself, so I can't >>>> look there. And all I could find on the net were discussions of using the >>>> Massbus adapter for normal SMD drives but in my case, I don't want Massbus >>>> at all. >>>> >>>> Christian > >-- >Nigel Johnson, MSc., MIEEE, MCSE VE3ID/G4AJQ/VA3MCU >Amateur Radio, the origin of the open-source concept! >Skype: TILBURY2591 >
