My Exchange 2010 SP1 (this same problem happened pre SP1) environment consists of a 2 server DAG with dedicated SAN storage. I have 21 databases.
However almost any action causes the DB's to lose sync with each other. If i don't touch anything they fairly rarely corrupt however if I failover one server to the other, the odds are 3-4 of the 21 dbs are going to have to be reseeded. When I have an update that requires me to reboot both servers I reboot #2 (all db's active on 1), it comes up, i fail over to 1 and reboot 2. At the end of this I have 6 DBs that need reseeding.
This is driving me crazy .. the sync between these can't be this fragile. What is wrong with my environment ?