is it getting power from the other SPS or is the power still flowing through the "SPS shell" even though its' no longer protected ?

I was discussing the situation while the SPS is being replaced.

If you have redundant SPS, you don't really have to worry. SP will remain running with the power supplied from the other SPS.

thanks Vipin for your reply,

how does power flow to the other SP and the SPS is directly connected to one SP?

does the two SPs are connected on the backend?

another question that popped up into my mind

the power supply in a DPE powers up the whole DPE or only its SP?

this may clear the picture

does anyone has any document that explains VNX power architecture?

thanks Roger for your reply

but i'm not asking about cabling, i'm asking about internal power structure.

please reread the post and any help will be appreciated.

Or you want this?

The SP and the first DAE.

You can refer to the documents generated by VNX documents portal: https://mydocs.emc.com/VNX/requestMyDoc.jsp

Install VNX

Install your VNX platform. Prior to installation, read the document in the Before you begin section above.

yes this first picture, but with DPE-based VNX systems that has only 2 power supplies.

how is power is distributed from SPSs to PSs to SPs ?

Usually the pictures like the first one are only for internal. I just have CLARiiON's in my hands, but it shouldn't be changed too much from a high level.