We mirror with XRC, which I believe is Global Mirror. (I cannot keep the current lingo straight.) In my shop, we have a business need to put any device--DASD or tape--online to any LPAR regardless of location. In order to do that, device addresses *must* be unique. If you have absolutely no need to do that, then I don't think uniqueness is required. OTOH is costs little to make them unique. If you don't do it from the get-go, it will be very difficult in the future.
. . 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] -----Original Message----- From: IBM Mainframe Discussion List <[email protected]> On Behalf Of Michael Babcock Sent: Monday, July 13, 2020 7:10 AM To: [email protected] Subject: (External):Re: Two Processors and One IODF CAUTION EXTERNAL EMAIL Thanks! We are using Global Mirror for replication. Not sure if using the same device addresses will be a problem or not for GM. So, does everyone recommend different device addresses? On Sat, Jul 11, 2020 at 1:01 PM Jackson, Rob <[email protected]> wrote: > I don't know if anyone has pointed it out, but if this is a brand new, > vanilla CEC, before you even have to worry about an IODF, you need an > IOCDS. Generally you create that deck from an IODF, and I can't > imagine you would choose not to. All of our CECs are defined in one > IODF. For a new machine across the state, we sent the IOCDS deck for > the target CEC (and common ICC configs) to the CE, and he put them on > a thumb drive; we then ran stand-alone IOCP to load the HSA. Then > with any (I would hope) form of replication you use, the IODF needed > for all the recovery LPARs is "just already there" on your recovery > SYS1.IPLPARM/IODF volume. > > Our DASD CUs and device addresses are different (I'm thinking they had > to be for either flavor of replication), but we don't have that many, > so we don't have to worry about running out. Our LPAR numbers are the > same on all CECs, and our OS configs are defined only once and are > used on all respective LPARs. > > There's nothing to it, and I don't know of a single reason not to have > one common IODF. > > First Horizon Bank > Mainframe Technical Support ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
