Exchange 2010: Adding database copies to databases with a single copy results in copy status failed after seeding is completed…

In recent weeks, I’ve worked with customers that have experienced database copies that go into a failed state immediately after adding a copy.  In all cases the following circumstances were noted:   The database previously only had a single copy. The single copy database had a backup performed on it <or> The single copy database…

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Another good read on vss backups…

http://blogs.technet.com/b/exchange/archive/2012/06/14/everything-you-need-to-know-about-exchange-backups-part-2.aspx   TIMMCMIC

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A good read on VSS backups…

http://blogs.technet.com/b/exchange/archive/2012/06/04/everything-you-need-to-know-about-exchange-backups-part-1.aspx

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Exchange 2010: The mystery of the 9223372036854775766 copy queue…

Database Copy Self-Protection Mode   What would you say if I told you that a copy queue length (CQL) of 9 quintillion log files was not a bad thing? By the way, if you are wondering, that works out to a CQL of 9,223,372,036,854,775,766, a number so big that it cannot be entered into Windows…

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Part 2: Datacenter Activation Coordination and the File Share Witness

In Part 1 of this series, I provided a high level overview of how Datacenter Activation Coordination (DAC) mode works and how the database mount process on startup is affected when DAC mode is enabled.  (http://blogs.technet.com/b/timmcmic/archive/2012/05/21/my-databases-do-not-automatically-mount-after-i-enabled-datacenter-activation-coordination.aspx)   Remember, with DAC mode enabled, different rules apply for mounting databases on startup. The starting DAG member must…

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Exchange 2010: Using seedingPostponed results in a seeded database…

In Exchange 2010 the add-mailboxdatabasecopy command is utilized to add mailbox database copies to database availability group members.  When a copy is first added to a member the database is automatically seeded along with the content index.  In some instances administrators desire to add a copy but not immediately invoke database seeding.  In order to…

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Exchange 2010: Mapping DAG network states to cluster network states…

In Exchange 2010 after a Database Availability Group (DAG) is created a series of DAG networks is also created.  These DAG networks serve to define how Exchange 2010 servers within the DAG will replicate and seed databases.  The initial network topology that is established is based off the enumeration of cluster networks.   The cluster…

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Part 1: My databases do not automatically mount after I enabled Datacenter Activation Coordination

Datacenter Activation Coordination (DAC) mode is a property of a Database Availability Group (DAG) that, when enabled, forces starting DAG members to acquire permission in order to mount databases. Administrators can enable DAC mode at any time after the DAG has been created. DAC was designed specifically to handle the following scenario:   You have…

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Verifying log file truncation…

In support we see cases from customers regarding log file truncation.  One question that commonly comes up is how do you verify log file truncation actually occurs?   The most common method that administrators use when verifying log file truncation post backup is to review the log file directory and note the count of files…

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Backup dates and times are incorrect even though data has been committed to backup media successfully….

This week I had a chance to speak with a customer who raised concerns that their backups were completed according to their backup application but Exchange was not showing that a successful full backup had occurred.  In this instance, the customer was utilizing backup software that had a centralized media server with agents installed on…

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