Hello All, Just making my Q very simple,

I have 2 Exchange server 2010 (DAG) in same site, server A and Server B.

Server A is my primary database server all 6 database are mounted on Server A.

today we found our all database are mounted on server B all database in failed and suspended mode,

I wanted to know the reason why it happens.

why all database failed and suspended mode.

please guide me. I have already checked the Event Log, IIS log,

I am running a command "Cluster log /g /copy:LogFolder /span:120" but getting log for todays date. i want a cluster logs for 5 days.

Regards

Sameer

Hi,

please check last boot time on both exchange servers.Might be they rebooted after windows update or other faiure.If so then database will fail over to secondary and you will have to manually fail them back to its origin.

systeminfo | find /i "Boot Time"

you can try this from Exchange powershell  :

Get-MailboxDatabaseCopyStatus * | where {$_.ContentIndexState -eq "failed"}

then this to repair

Get-MailboxDatabaseCopyStatus * | where {$_.ContentIndexState -eq "failed"} | Update-MailboxDatabaseCopy CatalogOnly

Thanks for your help, but i need what time database is switch over and what was the resaone to switch over.

Regards

sameer

Hi,

Based on my knowledge, there is no specific Event ID for DAG or datacenter switchover. But we can filter the Event with channel HighAvailability or MailboxDatabaseFailureItems to check the server status.

Generally, HighAvailability contains events related to the startup and shutdown of the Microsoft Exchange Replication service and all the components that run within it, and events such as a database mount, log truncation or events related to the DAG's underlying cluster. MailboxDatabaseFailureItems is used to log events associated with any failures that affect a replicated mailbox database.

Additionally, we can use a script called CollectOverMetrics.ps1 in Exchange 2010. CollectOverMetrics.ps1 reads DAG member event logs to gather information about database operations (such as database mounts, moves, and failovers) over a specific time period. For more information about this, please refer to:

https://technet.microsoft.com/en-us/library/dd351258(v=exchg.141).aspx

Regards,