All three phase IBM stuff from that era I have seen have phase rotation sensors, and will simply not go through the proper power sequence unless everything is fine.
-- Will On Mon, Jun 22, 2020 at 11:35 AM Pommier, Rex <rpomm...@sfgmembers.com> wrote: > > Hi group, > > I have a light - probably trivia by now - question for those of you who have > been around a while. My earliest experience with IBM disk was 3380s. They > ran 3 phase power, and if the phases weren't cabled correctly, the machine > wouldn't power up. I seem to recall hearing stories of (older than 3380) > disk drives that would start up, but the drives would spin backwards if the > power phasing was cabled incorrectly. Is there any truth to this story or > was somebody feeding me a line? > > Thanks, > > Rex > > The information contained in this message is confidential, protected from > disclosure and may be legally privileged. If the reader of this message is > not the intended recipient or an employee or agent responsible for delivering > this message to the intended recipient, you are hereby notified that any > disclosure, distribution, copying, or any action taken or action omitted in > reliance on it, is strictly prohibited and may be unlawful. If you have > received this communication in error, please notify us immediately by > replying to this message and destroy the material in its entirety, whether in > electronic or hard copy format. Thank you. > > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
