Originally posted by: polani
Guys
We have a POWER HA 7.1 standard edition implemented with Enhanced concurrent mode VG(s) and shared disks are replicated to DR site using SVC synchronous mirror.
The Lpar at DR site is a standalone LPAR. We did a successful failover to DR recently , by breaking SVC synchronous mirrors and getting all filesystems mounted at DR site. However the volume group at DR site was also a enhanced concurrent vg ( as expected ) and varied on manually.
We did not make any data changes on DR site during DR excersice , however the question is what if we change the data contents of filesystems and get them unmounted , volume group varied off at DR site and then reverse replication direction from DR to production site ? Would it impact any thing on production POWER HA clusters? Off course we would stop POWER HA clusters before reversing data replication direction however my real question is as we varied on this ECVG in manual mode at DR site , once we will replicate it back to production site then VG's changed characteristics would also probably replicated to production site and we might face issues while starting POWER HA clusters ... anybody did this kind of replication direction reversal while using POWER HA , please guide ... many thanks