We're looking to have storage-to-storage replication solution form IBM to a DR site.
What should we look for? Not sure how storage could support replication that will be consistent with transaction databases?
For example, Oracle ASM could have multiple disk groups and each disk group - multiple disks/LUNs.
How storage could guarantee awareness of disk cross-dependencies? One example, let's say we should at least guarantee
that LUNs that contain redo logs must be replicated before any other data in datafiles, because that's how databases
make sure they can replay/undo transactions in case of recovery to a last known consistent state...
Will appreciate any comments.