AUTOSWITCH does NOT require GRS/MIM, etc to work inside or outside the sysplex any longer. We have same tape drives online to 5 different sysplexes.
You’ll see messages such as this when a drive is in use by systems outside the current sysplex/system IEF292I UNIT 211E IS ASSIGNED TO A FOREIGN HOST IEF294I UNIT 211E IS NO LONGER ASSIGNED TO A FOREIGN HOST However, if you want to share the library between two separate environments, you need to update DEVSUP00 in all environments to assign unique media types so that the library can keep the tapes separate between both mono-plexes/sysplexes. If you do not, you will run into problems because your tape catalog will get out of sync very quickly, and you may end up scratching, overwriting tapes from each environment. You’ll need to enter scratch tapes separately into each environment to get the correct media type assigned to them. MEDIA1= MEDIA2= MEDIA3= ERROR= PRIVATE= Dave Jousma Vice President | Director, Technology Engineering From: IBM Mainframe Discussion List <[email protected]> on behalf of Radoslaw Skorupka <[email protected]> Date: Wednesday, May 28, 2025 at 5:58 PM To: [email protected] <[email protected]> Subject: Re: Autoswitch IMHO that's more complex topic. AFAIK that requires some add-on software like CA MIM family member or IBM ATAM. However IMHO virtual library is the cure, with no AS devices or add-on software. Reason: plenty of virtual devices. Just plan it, and statically assign the devices to the systems. In the old days I had to do it for physical drives, muuuuuuch less drives. Then some ATAM would help me, but I had no budget for that. -- Radoslaw Skorupka Lodz, Poland W dniu 28.05.2025 o 23:29, Steve Beaver pisze: > I’m more looking to vary a device Range on 2 monoplexs that share a library > > > Sent from my iPhone > > No one said I could type with one thumb > >> On May 28, 2025, at 16:16, Radoslaw >> Skorupka<[email protected]> wrote: >> >> I think IODF setting is simply default state of the devices. >> You can use V ccuu,AUTOSWITCH,ON /OFF with no changes to IODF. >> Caution: this command changes (varies) all devices in the CU. >> >> -- >> Radoslaw Skorupka >> Lodz, Poland >> >> >> W dniu 28.05.2025 o 21:22, Allan Staller pisze: >>> Classification: Confidential >>> >>> Works fine. I do not know if the IODF setup is a required pre-requisite or >>> not. >>> >>> -----Original Message----- >>> From: IBM Mainframe Discussion List<[email protected]> On Behalf Of >>> Steve Beaver >>> Sent: Wednesday, May 28, 2025 1:20 PM >>> To:[email protected] >>> Subject: Autoswitch >>> >>> [CAUTION: This Email is from outside the Organization. Unless you trust the >>> sender, Don’t click links or open attachments as it may be a Phishing >>> email, which can steal your Information and compromise your Computer.] >>> >>> Does anyone have any experience with the following command versus doing it >>> in the HCD? >>> >>> >>> >>> VARY (xxxx,xxxx),AUTOSWITCH,ON >>> >>> >>> >>> >>> >>> >>> >>> Regards, >>> >>> >>> >>> Steve Beaver >>> >>> >>> ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN This e-mail transmission contains information that is confidential and may be privileged. It is intended only for the addressee(s) named above. If you receive this e-mail in error, please do not read, copy or disseminate it in any manner. If you are not the intended recipient, any disclosure, copying, distribution or use of the contents of this information is prohibited. Please reply to the message immediately by informing the sender that the message was misdirected. After replying, please erase it from your computer system. Your assistance in correcting this error is appreciated. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
