Saturday, May 28, 2011

CCR Cluster: Unable to mount databases

Topology
=========
Exchange 2007 Active/Passive CCR Cluster
EVS Name : TestEVS
Node Names : Test1, Test2

Unable to mounte databases when Test1 was active node.
For some reason it failover and could not mount the stores and resources for the Storage Group
failed to come online. He had shut down the Test1 node.
All Resources were online on Test1 node except second Storage Group and Third Storage Group.

Event ID
=========
Event Type: Error
Event Source: ESE
Event Category: Logging/Recovery
Event ID: 496
Date: x/x/xxxx
Time: xx:xx:xx AM
User: N/A
Computer: Test1
Description:
eseutil (3456) Database E:\Program Files\Microsoft\Exchange Server\Mailbox\Second
Storage Group\Test1 Mailbox.edb requires logfile F:\Program
Files\Microsoft\Exchange Server\Mailbox\Second Storage Group\e01000xxxxx.log
created at xx/xx/xxxx xx:xx:xx in order to recover successfully. Recovery found
the logfile created at xx/xx/xxxx xx:xx:xx .

Resolution
=============
Both(A/P) copies of Databases were in Dirty shutdown.
Required Logs were present in the respective location.
we have 2 options
To use Restore-StorageGroupCopy command "Restore-StorageGroupCopy "CMS Name\SG name"
To run a soft recover on the passive copy or on the node where the log file was created.
As we had failed in running the command Restore-StorageGroupCopy on the passive node
Ran a soft recovery on the passive node.
Soft recovery was successfull. Databases came in clean shutdown state
Failed over the resources from active to passive, all the resources came online successfully.

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