Hello all and thanks to anyone who can give me some assistance.
Our exchange setup:
Exchange 2010 SP1 - 2 sites with all roles installed - connected via 100m circuit. We have 5 databases setup on a DAG.
The server with the passive copies crashed yesterday - showing the following in the eventlogs
RPC request to the Microsoft Exchange Information Store service for log truncation failed for database store2\EXCHANGE2. Error: 4294965485.
I deleted this particular databases passive copy, and reseeded. Everything looked okay until the backup ran on the active databases and crashed trying to delete the logs for this db.