We have got 2 Exchange 2013 CU1 servers (MBX and CAS together) ex1 and ex2 in a DAG on Windows Server 2012.
With a delay of 1 week, we upgraded to Exch 2013 SP1. Since then I'm seeing database failovers between the exchange servers daily at the same time - around 1:30 pm :-(
We have 12 dbs. Say in the morning, all 12 of them active on ex1, by 1:30 pm, few of them move to ex2. I also see that the passive copy is disconnected but health, bad copy count is 1 for few dbs, and copy queue length is 26 or more for few of them.
They do this like for 45 mnts to 1 hour and atlast they settle down - few of the dbs on ex1 and few on ex2.
It happens again the next day - almost since a week.
Reviewing Event viewer says that there could be storage issue (Using EMC VNX 5300 ).
When checked with EMC they say, their logs do not talk about any failures !!!!
Did anyone come across the above issue?
Any suggestion or help to fix this is greatly appreciated.
