Mirroring does not replace good backup tapes: an accidental ERASE or FORMAT is mirrored perfectly well to your DR site. Secondly: if you simply have a two copy mirror, performing DR tests means you break the mirroring during the test and at that time you no longer have a mirror.
2009/12/16 Ivica Brodaric <[email protected]> > Mike, > > I didn't mean to be smart, sorry if it came out that way. I just wanted to > stress that everything you need to perform a DR, including hardcopy reports, > utility tapes, DR procedure manual, CD's with software manuals, etc. has to > be on a DR site or in the off-site storage, that's all. > > Of course, mirroring makes that much easier, because your DR system is just > waiting to be IPLed. You have to send less stuff off-site, a lot of it can > be kept on disks. Anything that you may need *before* you bring up VM, and > that answers questions "where is...?" has to be either in the DR manual or > in the hardcopy report on the DR site. > > My recent experience is also with mirroring - two sites running half of > production load each, disk mirroring each way. LPAR configs were identical > between sites and DR meant logging on one second level VM on each surviving > VM(*) and PROFILE and other EXECs would take care of the rest. But I still > miss the good ol' days of walking into a DR site and actually *doing > something* to restore the system. Oh, wait, maybe I don't. It's just > nostalgia. I was just much younger then. :-) > > Ivica > > (*) I don't suggest this setup unless you have plenty of storage and zero > paging in production LPARs. At least that. > -- Kris Buelens, IBM Belgium, VM customer support
