The last place I worked before retiring we had three different sysplex environments. They all shared two TS7700 boxes. I just did separate tape drive address ranges for each environment. The storage team worked out how to segregate the tape volser information inside the TS7700s, that was outside of my area of work.
Yes, we did used AUTOSWITCH with in each of the environment. Paul -----Original Message----- From: IBM Mainframe Discussion List <[email protected]> On Behalf Of Jousma, David Sent: Friday, May 30, 2025 7:28 AM To: [email protected] Subject: Re: Autoswitch Radoslaw, you said: “Yes, autoswitch does not require MIM. However autoswitch will not work across sysplex boundaries.” This is not correct with regards to TS7700 series tape libraries. It does work across sysplex boundaries without additional software. You are correct with regards to stand alone tape drives I believe. Not sure how much of that is still around though. Dave Jousma Vice President | Director, Technology Engineering From: IBM Mainframe Discussion List <[email protected]> on behalf of Radoslaw Skorupka <[email protected]> Date: Friday, May 30, 2025 at 8:12 AM To: [email protected] <[email protected]> Subject: Re: Autoswitch W dniu 29.05.2025 o 13:58, Jousma, David pisze: > 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. Again: it is NOT ABOUT GRS/MIM. Yes, autoswitch does not require MIM. However autoswitch will not work across sysplex boundaries. However there are software products which allow it. Product names are IBM ATAM (Automated Tape Allocation Manager) and CA-MIA. Both are licensed (and paid) products. And still, having dozens of virtual drives allow user to assign the drives statically and forget about the issue. -- Radoslaw Skorupka Lodz, Poland > 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 ---------------------------------------------------------------------- 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 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
