Some Googling suggests that there really were no 12" floppies. I suspect if you grew up with late "hard" floppies, 8" look enormous, are easily mistaken for 12"!
-----Original Message----- From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of Ed Jaffe Sent: Friday, July 12, 2024 8:51 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: Mainframe history - 12 inch floppies? On 7/11/2024 9:00 AM, Radoslaw Skorupka wrote: > I just found information in some book that IBM mainframes used 12 inch > floppy diskettes. Late 70's. > > Anybody heard about such diskettes? When I first set foot in an IBM-mainframe computer room, the CPU and peripherals used 8"floppy diskettes for loading the internal code. I never saw a 12" floppy diskette used. -- Phoenix Software International Edward E. Jaffe 831 Parkview Drive North El Segundo, CA 90245 https://www.phoenixsoftware.com/ -------------------------------------------------------------------------------- This e-mail message, including any attachments, appended messages and the information contained therein, is for the sole use of the intended recipient(s). If you are not an intended recipient or have otherwise received this email message in error, any use, dissemination, distribution, review, storage or copying of this e-mail message and the information contained therein is strictly prohibited. If you are not an intended recipient, please contact the sender by reply e-mail and destroy all copies of this email message and do not otherwise utilize or retain this email message or any or all of the information contained therein. Although this email message and any attachments or appended messages are believed to be free of any virus or other defect that might affect any computer system into which it is received and opened, it is the responsibility of the recipient to ensure that it is virus free and no responsibility is accepted by the sender for any loss or damage arising in any way from its opening or use. ---------------------------------------------------------------------- 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
