UCBs are not devices. There is no way for a single z/OS system to access more than 64Ki minus 256 devices, although you can add additional exposures to existing devices.
-- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Discussion List <[email protected]> on behalf of Jesse 1 Robinson <[email protected]> Sent: Thursday, January 4, 2018 5:35 PM To: [email protected] Subject: Accessing 65536 devices We would like to be able to access >65535 device addresses (UCBs) from a single LPAR via a single IODF. The need is for bringing a new DASD subsystem online while retaining the old subsystem until all volumes can be copied across. We currently have spare UCBs available, but not enough to have all old and new devices online at the same time. Is this possible? . . J.O.Skip Robinson Southern California Edison Company Electric Dragon Team Paddler SHARE MVS Program Co-Manager 323-715-0595 Mobile 626-543-6132 Office <===== NEW [email protected]<mailto:[email protected]> ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
