Alain, At the risk of misinterpreting what you're asking, I have to caution you that because you CAN share tape drives between MVS systems with the "multiuser" option, it doesn't mean you SHOULD (at least, using native facilities).
HELP for the CP ATTACH MULTIUSER option says "The MULTIUSER function is intended for guest operating systems that manage their own assignment of tape drives". MVS does not, by default, manage its own tape drive assignments. There may be others but the only facilities I'm aware of capable of tape sharing are CA's Multi-Image Manager (as described by CA's own Steve Imler) and MVS' native Automatic Tape Switching (via either IEFAUTOS or ATS STAR features) and I'm not sure if that works in a MVS-under-VM environment (and it certainly doesn't work with a CMS workload included). Failure to use one of these factilities (or some other equivalent which I'm not aware of, including home-grown facilities) in conjunction with MULTIUSER could result in ASSIGN errors (IOS000I ..ASN, as I recall) or possibly (I doubt MVS will allow this to happen but ...) data corruption. Be careful. Dennis Schaffer Mutual of Omaha "The IBM z/VM Operating System" <[email protected]> wrote on 03/10/2007 02:28:21 PM: > I read a similar discussion on the mailing list about assign. > > We don't have any tools to share tapes between 1 VM & 20 MVS. > Something has been developped in the past which is not really up-to-date. > We remarked it needs too much CPU to do its work. > > > I project to use our VM to be THE platform to share tape drives between > lpars in a normal prod or when we do our disaster recovery tests > (MVS are lvl2). > We only have ATL robots. I just tested one thing that could give other ideas > to investigate. > I have attached a drive with the multiuser option. In parallel it was used > by a MVS. Then I tested the dfsmsrm q dev xxx (assign cmd and I was > surprised to get the volser that was mounted in MVS. If dfsmsrm is able to > send back this info, can't it be able to send back the part number or the > MVS partname too ? That could be great. > And (What VM diag D0 would say if a tape is mounted in a MVS ?) > > Alain Benveniste > > > This e-mail and any files transmitted with it are confidential and are solely for the use of the addressee. It may contain material that is legally privileged, proprietary or subject to copyright belonging to Mutual of Omaha Insurance Company and its affiliates, and it may be subject to protection under federal or state law. If you are not the intended recipient, you are notified that any use of this material is strictly prohibited. If you received this transmission in error, please contact the sender immediately by replying to this e-mail and delete the material from your system. Mutual of Omaha Insurance Company may archive e-mails, which may be accessed by authorized persons and may be produced to other parties, including public authorities, in compliance with applicable laws.
