We're in a re-architecturing stage of our databases and just recently we've experienced the 4th SAN blip since a SAN has existed in our shop.
We're contemplating having two different SAN's (maybe even from different vendors) to remove the single point of failure. Yes, our SAN was sold as a "dual everything" and could never break SAN. BUT it still shares the same firmware which of course after a firmware upgrade blew it's brains when it was attempting a fail over leaving us with a "brown outage" (half the systems down, a quarter in a funny state and a quarter humming along). Of the 4 outages, 3 different brands of SAN's.
I've read some stuff on ASM but am not finding a clear answer, can I mirror all flow of data to our Oracle databases to the two different SAN's so that if SAN 1 breaks, SAN 2 takes over with no loss of service? Or would I still need some Dataguard or something to make this work?
Thanks for any response in advance.
Paul.