Hello Al, >> The surfaces of the disk packs of type 9871 or 871 that came with it where >> corroded and are not usable anymore. > >Did you keep them? > >The platters can be replaced with ones from the single-platter IBM 2315 (ie. >RK05) and use similar head technology which is pretty rugged.
> Yes, I kept the disk packs. However, I guess that one need to have special alignment tools to replace single platters of a disk pack. Or is a reformat enough, as long as the servo disk surface is error-free and available? >The two drives you have are equivalent to IBM 2311 and 2314, which both use >hydraulic actuators. > I didn't know that they were equivalent! Are you sure it's the drives themselves that are equivalent between IBM and CDC, not the disk pack specs for both drives? I assumed that the IBM and CDC drives wth hydraulic actuators were independent developments... >We were constrained at the time by what we could take from Dortmund. As it was >it was a very expensive move. >I'm glad that so much of what we couldn't take was saved. >From what I found regarding remaining documents hidden inside some cabinets in >Dortmund, I scanned them in already and most of them were uploaded to >bitsavers in the past. All the best, Pierre
