Thanks for the direction to a proposed solution. For us here, it presents us with some challenges. We have DS8884s running R8 code. and we are just now going to z/OS 2.4 --- so the redbook may be presenting features we cannot use from R9 and z/OS 2.5 We cannot go to z/OS 2.5 until after our data center move which will take us from a z12BC to a z14 or z15 platform. I do not know if DS8884 can be upgraded to 9.2 or any 9.x level.
The 3-site solutions in the redbook are based on a combination of Metro Mirror for H1 to H2, and Global Mirror to H3. I will not go to synchronous via Metro Mirror. The distance for H1 and H2 may be too far. and the SAN (FCIP) link too slow. There was no indication that the same source could participate in two Global Mirror relationships. 'on the fly' reconfiguring to move a mirroring relationship to swing it from H1-H2, to H1-H3 then after cutover go to a H3-H2 global mirror again for DR - would be to error prone and lengthy. Can DS8800s be updated to R9 code? Still wondering if a Global Copy session could get us running. The fuzziness of the copy is a concern as well. Shutting down production use to get consistency during the GC would take too long over the FCIP link. Trying to keep my options and my mind open. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
