On Sun, 19 Mar 2023 23:34:48 +0100, Radoslaw Skorupka <r.skoru...@hotmail.com> wrote:
>I'm aware it is quite obsolete topic. >Q: was it possible to connect Amdahl or Hitachi machines with IBM CPC >using sysplex links? >Did they use the same hardware and protocol? > >BTW: I found the following Hitachi CF link descriptions: ISCH2, ICF, >ISB, ICC. Any of them is similar to IBM links (I know IBM channels, its >names, etc.) >Any clue? > >Another question: I found some non-IBM machines offered over 256 >channels. How??? >Note, it was definitely before XMP machines (multiple CSS). I know of a customer who connected IBM z (maybe 9672) with Amdahl and Hitachi equivalents. It was bumpy at times, and there was some finger-pointing between the suppliers, but they ran more than one such mixed sysplex. I don't know much of the details, but the suppliers would have had to follow the same signalling protocols. That they didn't exactly do so may very have been the root of their interoperability issues in the beginning. I would think they either had to use the same connectors or else run through ESCON/FICON directors, or at least a patch panel. While the internal hardware layer could be different, it would have to "look" the same to the OS (XCF, etc.) - again, another potential source of the interoperability problems. Art Gutowski ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
