Updating PowerPath - Is it trivial on Exchange 2010SP3 DAG?

Hi All,

I'm a bit green when it comes to EMC, but I'm learning...

I was going over some of the Boxes I'm now responsible for in an effort to get them patched from a-z.  I have a two-node Exchange 2010 DAG setup and I was wondering if someone could bother to either point me in a direction for Exchange PowerPath documentation or tell me of their experience when updating PowerPath regarding Exchange DAGs.

It seems like I should dismount the databases to be on the safe side?

Has anyone ever patched a DAG in which you leave the databases mounted and just patch the node that has the "Healthy" (not mounted) portion of the DAG?

Planning on going from version 5.3SP1 to 5.7SP4.

Thanks a lot for your time,

Mr Mister