kluken wrote:
The 7000 series is designed to be customer install so I don't see how adding drives would void a warranty. As for how to lay out the disk I guess since the SAS shelves are really a serial daisy chain it may not matter too much since there is no concept of point to point like there is in the P10000. As mentioned though a shelf can fail you would probably experience corrupt data. Optimal config is to have enough shelves such that a RAID set puts chunklets across shelves so if a shelf fails the data is still there and accessible. We do 4 shelves and use RAID 5 3+1 with Cage HA so that chunklets should be spread across the shelves. I am not an expert in SAS connectivity so I don;t know how the IO actually gets processed especially within a shelf.
it was designed for it, but never released for (as of yet).
With the installation service, HP 3PAR support will also determine optimal placement.
There are rules and best practices on what to place where. e.g. with the P10000 series (FC) mags should always occupy the two most outer slots. the 7000 has a few similar rules. Why tinker around with it, and maybe cause issues later because of wrong placement?
Personally I would drop the current reseller and get a better one that really thinks with you, and takes these things out of your hands, instead of just selling drives...