Monitoring hardware configuration

Hi
I am managing multiple SQL Server instances span across multiple locations.
I am trying to get all information about the server hardware, and software configurations. But logging in to each server to receive the information is quite time consuming. Is there any way I can automate them. I managed to get most of the information using powershell (get-wmiobject) but I am unable to get the SAN information. Is there anyway I can get it without going through different programs
The servers belong to different domains, but I have administrative access to them
Thank you

SAN information /WMI is provided by SAN product manufacture.No SAN API available in Windos O.S.
so you may find info or wmi calls in the SAN technical manuals of the product

Thanks. I expected this. I'll contact the hardware vendors to get the details.