Exchange 2010 DAC, PAM's and FSW
Posted on 2012-04-07
We are running Exchange 2010 across two sites (London and Munich). One DAG.
There are 6 servers in each site.
MU-EXCH1 to MU-EXCH6
LON-EXCH1 to LON-EXCH6
The active databases in the DAG are spread across both sites.
We also have DAC enabled on the DAG. The FSW is located on a server in MUNICH.
I've read the Technet articles etc, but I'm still not entirely sure of the relationship between the FSW, the PAM and the DAC setting. As far as I know, DAC will prevent multiple copies of a DB being mounted in the event that LON and MUNICH lost connectivity with each other.
Could someone please confirm if I am correct in the following statements -
i. If we lost connecivity between LON and MUNICH, then ALL DB's would be mounted in MUNICH as that is where the FSW is located.
ii. What does the PAM do in terms of deciding where DBs are mounted? Or does it only hold information of WHERE the DB's are mounted?
iii. How can I find out which server has the PAM role and the status of the PAM