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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...
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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....
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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...
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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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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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Exchange 2010: Adding database copies to databases with a single copy results...
In recent weeks I’ve had the chance to work with customers that have experienced database copies that are in a failed state immediately after adding a copy. In all cases the following circumstances...
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Part 5: Datacenter Activation Coordination: How do I force automount consensus?
In order for any database availability group (DAG) that has Datacenter Activation Coordination (DAC) mode to be able to mount any databases, the DAG itself much reach automount consensus. In the...
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Part 3: Datacenter Activation Coordination and the Single Node Cluster
In part 2 of this series, I provided a high level overview of how the witness server for a database availability group (DAG) is used with Datacenter Activation Coordination (DAC) mode in the scenario...
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Part 4: Datacenter Activation Coordination and the Prevention of Split Brain
In Part 1 of this blog post series, I discussed the rules for mounting databases when Datacenter Activation Coordination (DAC) mode is enabled on a Database Availability Group (DAG). In this post, I...
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Part 6: Datacenter Activation Coordination – Who has a say?
I recently worked with a customer that had a three-member database availability group (DAG) that was extended to two sites in a site resilience configuration. During scheduled maintenance in the...
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Exchange 2010: StopDagServerMaintenance.ps1 resets server and database...
In Exchange 2010, when a database availability group (DAG) member needs service, it can be placed into maintenance mode. To do this, Exchange 2010 includes scripts for this process called...
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Exchange 2010 Database Availability Groups and Disk Sector Sizes
These days, some customers are deploying Exchange databases and log files on advanced format (4K) drives. Although these drives support a physical sector size of 4096, many vendors are emulating 512...
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Exchange 2010: Page Zeroing and VSS Based Backups
In Exchange Server 2010 Service Pack 1, page zeroing is enabled by default and there is no method to disable it. Page zeroing is a process that takes pages that exist in whitespace within the database...
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Part 7: Datacenter Activation Coordination: When to run...
When running Restore-DatabaseAvailabilityGroup as part of the datacenter switchover process, servers in the secondary datacenter are forced online from a quorum and cluster perspective, and servers in...
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Extra Extra: Recommended hotfix for your dag…
http://blogs.technet.com/b/exchange/archive/2011/11/20/recommended-windows-hotfix-for-database-availability-groups-running-windows-server-2008-r2.aspx
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Exchange and VSS -- My Exchange writer is in a failed retryable state…
In Exchange 2007 and Exchange 2010 many customers are leveraging VSS based backups to retain and protect their Exchange data. By default Exchange provides two different VSS writers that share the same...
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Verifying the file share witness server / directory in use for Exchange 2010
If you’ve read my blog post on file share witness oddities you might be asking yourself “how can I actually verify what file share witness is in use in my environment?” There are three different ways...
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Exchange 2010: Log Truncation and Checkpoint At Log Creation in a Database...
In previous versions of Exchange, when a backup was completed, almost all log files prior to the current log file were truncated from the system. Administrators monitoring the directory would...
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Backups fail due to consistency check failure…
Last week I had the opportunity to work with a customer who was experiencing issues backing up their Exchange 2010 databases. The issue they experienced though is relevant to both Exchange 2007 and...
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Backup dates and times are incorrect even though data has been committed to...
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...
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