Re: Setting pathing policy

You can list all LUNs with

$esxcli.storage.nmp.device.list()

With a Where-clause you can extract the LUNs you want to change.

I suppose you have that information somewhere, perhaps in a CSV file ?

Once you have the devices, it's a matter of calling something like

$esxcli.storage.nmp.device.set($null, $canonicalname, "VMW_PSP_MRU")

See Example 5 in the Get-EsxCli cmdlet.