Tom, It's been possible to establish a Metro Mirror relationship between a fully-provisioned primary and an extent space-efficient secondary since R8.2 although there are some gotchas that need some planning and clean-up.
I'm not sure why you would want to do Metro Mirror within a DS8000? Metro Mirror is usually done for high availability which sort of presupposes physically separate DS8000s at a minimum. I think I might have missed your business requirements. Also, I'd expect IBM to step up and give you advice when you're spending money on replication capacity. On Sat, 19 Mar 2022 at 18:11, Tom Longfellow < 000003e29b607131-dmarc-requ...@listserv.ua.edu> wrote: > Yes, that reference looks very close to what I want to do. It has been > drummed into me with the replies and documentation that a set of two > parallel GM sessions from the same source volumes (H1) to two other sets of > volumes (H2 and H3) is just not supported. > > I have developed a new Idea and I could use some feedback. How does this > sound? > 1. A Metro Mirror within a single DS8k Where set H1 clones to H2. > 2. Establish a second Global Mirror from H2 to the new DS8900F - H3 > > This is close to the Metro/Global Mirror scenario in the documentation. > It just moves the H2 target from a 3rd DS8k into the H1 DS8k. > > There are potential pitfalls that need more research > 1. Can H2 be Space Efficient volumes in a Internal Metro Mirror or do > they have to be fully configured for space? > 2. Can the H2 be both the target of a MM *and* the source of a GM > relationship? > 3. Does this expose us to buying additional capacity licenses for the > Copy Services license? > > Fancy technology breeds fancy problems. > > ---------------------------------------------------------------------- > 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
