Actually you shouldn't have to make any changes to PowerPath. If you mask in new devices from a DMX to a Windows host running a fairly recent version of PowerPath and the licensing is already enabled for Symmetrix arrays, then the devices will be added into PowerPath and set the policy on those devices to SymOpt by default.
I have never had to manually set the policy on new devices masked from a DMX to a newer Windows box running current versions of PowerPath.
On Windows you could do it in the PowerPath GUI. Make sure you check each and every LUN, but I must say, the commandline command is much faster and easier with the "dev=all" part (policy=so stands for SymOpt)
RRR
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Posted November 25th, 2008 06:00
For the rest I'd leave everything as is.