We have a CX500 with mixture of FC and ATA disk trays. Is there a best practise in how the SP's should be allocated among the LUNS/trays.

ie. Should the SP A be for FC based LUNS and SP B for ATA LUNS, or does it not matter as far as LUNS are distributed evenly among the the SPs?

Another question I have is, is there a Reporting tool that I can use to analysis LUN/Raid group usage in the same fashion as on does on Windows servers using Perfmon?

I have used SAN Analyser, which is good for real time, but can I log it somewhere and analysis it later?

Sorry if these had been answered before.
Thanks in advance