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Tim McMichael
Navigating the world of high availability...
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Tim McMichael
Cluster Core Resources fail to come online on some Exchange 2010 Database Availability Group (DAG) nodes.
Posted
over 3 years ago
by
TIMMCMIC
25
Comments
Although Exchange 2010 no longer deploys a cluster resource model we still use Windows Failover Clustering service for certain functions. When a Windows 2008 / 2008 R2 cluster is created, the cluster core resources are groups together in the ‘Cluster...
Tim McMichael
Windows 2008 / Multi-subnet clusters and using static routes.
Posted
over 4 years ago
by
TIMMCMIC
13
Comments
=========================================================== ***SEE UPDATE*** =========================================================== With the enhancements in Windows 2008 to allow for multi-subnet clustering it is becoming more common to see this...
Tim McMichael
Exchange 2010: Cluster core resources, the replication service, and active manager…
Posted
over 3 years ago
by
TIMMCMIC
15
Comments
Every Exchange 2010 server has a process internal to the replication service known as Active Manager. The Active Manager is responsible for all database mount, dismount, and move operations that occur in Exchange 2010. When a server is a standalone...
Tim McMichael
Exchange and VSS -- My Exchange writer is in a failed retryable state…
Posted
over 1 year ago
by
TIMMCMIC
9
Comments
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 VSS writer ID but are loaded by two different...
Tim McMichael
Exchange 2007 SP1 CCR- Windows 2008 Clusters - File Share Witness (FSW) failures.
Posted
over 4 years ago
by
TIMMCMIC
3
Comments
Exchange 2007 SP1 Cluster Continuous Replication (CCR) clusters built on Windows 2008 most commonly uses the quorum model "Node Majority with File Share Witness". In the past few weeks administrators have noticed that the file share resource...
Tim McMichael
Exchange 2010 – File Share Witness oddities…
Posted
over 3 years ago
by
TIMMCMIC
11
Comments
In Exchange 2010 when a Database Availability Group (DAG) it utilized, and there is an even number of DAG members, the underlying cluster is implemented utilizing the quorum type Node and File Share Majority. The settings utilized for the File Share...
Tim McMichael
Exchange 2010: Collapsing DAG Networks
Posted
over 2 years ago
by
TIMMCMIC
19
Comments
As a post configuration step in an Exchange 2010 Database Availability Group installation the administrator may need to collapse Database Availability Group Networks. Unfortunately this is a commonly missed configuration which results in the replication...
Tim McMichael
Permissions recommended for the CNO (Cluster Name Object) in Windows 2008 for Exchange 2007 SP1 setup operations.
Posted
over 4 years ago
by
TIMMCMIC
4
Comments
In Windows 2003 when cluster would attempt to create or modify Kerberos enabled machine accounts it would do so by leveraging the rights assigned to the cluster service account. The Windows 2003 cluster service would use this domain account for...
Tim McMichael
Exchange 2010 SP1: StartDagServerMaintenance.ps1 fails when a server contains databases with a single copy.
Posted
over 2 years ago
by
TIMMCMIC
9
Comments
In Exchange 2010 Service Pack 1 we introduced some new DAG management scripts. These scripts can be found in the Exchange Server installation directory \ scripts. (This is usually c:\Program Files\Microsoft\Exchange Server\v14\scripts). ...
Tim McMichael
Exchange 2007: Renaming the default storage group / mailbox database or deleting and recreating.
Posted
over 4 years ago
by
TIMMCMIC
4
Comments
This question has seem to come up a lot lately, and since I have an opinion on it I figured it’s time to blog it. When you run Exchange setup for the first time we will always create a default storage group and default mailbox database (also depending...
Tim McMichael
Exchange 2010 – Stopping the Information Store Service does not failover database copies.
Posted
over 3 years ago
by
TIMMCMIC
5
Comments
In Exchange 2010 we achieve high availability of mailbox databases by utilizing a Database Availability Group (DAG). When a DAG is utilized, and mailbox database copies are created on DAG members, they are either MOUNTED (active) or have a copy...
Tim McMichael
Verifying the file share witness server / directory in use for Exchange 2010
Posted
over 1 year ago
by
TIMMCMIC
1
Comments
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 to verify the witness in use for Exchange...
Tim McMichael
Exchange 2010: Restore-DatabaseAvailabilityGroup fails to evict nodes error 0x46.
Posted
over 2 years ago
by
TIMMCMIC
7
Comments
Restore-DatabaseAvailabilityGroup is one of the cmdlets used as part of the datacenter switchover process. The purpose of Restore-DatabaseAvailabilityGroup is to read the DAG’s list of stopped servers and evict the listed servers from the DAG’s...
Tim McMichael
Exchange 2010 SP1: Error when adding or removing a mailbox database copy
Posted
over 3 years ago
by
TIMMCMIC
14
Comments
If an Exchange 2010 RTM server <or> an Exchange 2010 SP1 Beta has been upgraded to Exchange 2010 SP1 RTM administrators may experience an error when attempting to utilize the remove-mailboxdatabasecopy <or> add-mailboxdatabasecopy commandlets...
Tim McMichael
Exchange 2010 SP1: StartDagServerMaintenance.ps1 fails on databases that have only two database copies.
Posted
over 2 years ago
by
TIMMCMIC
12
Comments
In Exchange 2010 Service Pack 1 we introduced some new DAG management scripts. These scripts can be found in the Exchange Server installation directory \ scripts. (This is usually c:\Program Files\Microsoft\Exchange Server\v14\scripts). One of...
Tim McMichael
File Share Witness (FSW) placement and the cluster group.
Posted
over 4 years ago
by
TIMMCMIC
1
Comments
With Exchange 2007 Cluster Continuous Replication clusters the recommended quorum type for the host cluster is Majority Node Set with File Share Witness (Windows 2003) or Node Majority and File Share Witness (Windows 2008). In this blog post I want to...
Tim McMichael
MSExchangeRepl 2147 / MSExchangeRepl 2104 / MSExchangeRepl 2127 occurring on Windows 2008 or Windows 2008 R2 with Exchange 2007 Cluster Continuous Replication (CCR)
Posted
over 3 years ago
by
TIMMCMIC
11
Comments
When Exchange 2007 CCR is installed on Windows 2008 or Windows 2008 R2 the following error may be noted in the application log of the passive node: Log Name: Application Source: MSExchangeRepl Event ID: 2104 Task Category: Service Level: Error Keywords...
Tim McMichael
Exchange 2007 / Exchange 2010 – Interesting recipient update service issue…
Posted
over 3 years ago
by
TIMMCMIC
2
Comments
I recently had a case come across my desk where end users reported that after changing certain attributes in the directory these attributes were reverted to original or incorrect values. In this case what we had was a centralized portal for information...
Tim McMichael
Get-storagegroupcopystatus = Initializing
Posted
over 4 years ago
by
TIMMCMIC
4
Comments
A question that I see a lot of, and causes come confusion out there, is why does get-storagegroupcopystatus report a status of initializing for replicated storage groups. This status occurs when using any form of replication (LCR = local continuous...
Tim McMichael
Exchange Replication Service (Exchange 2007 SP1) and Windows 2008 Clusters
Posted
over 5 years ago
by
TIMMCMIC
3
Comments
If you are reading this blog post I also suggest you read the the following white paper: "White Paper: Continuous Replication Deep Dive" which can be found at http://technet.microsoft.com/en-us/library/cc535020.aspx . This...
Tim McMichael
Exchange 2010: VSS backups of passive database copies fail with error C7FF07D7 when preparing snapshot.
Posted
over 2 years ago
by
TIMMCMIC
2
Comments
Recently I worked with a customer that was having backup failures when attempting to backup passive database copies on an Exchange 2010 DAG member. Active database copies would backup without any issues. The issue reproduced with both the...
Tim McMichael
Exchange 2010: HomeMTA and msExchHomeServerName are not updated on mailboxes.
Posted
over 2 years ago
by
TIMMCMIC
8
Comments
In Exchange 2003 and Exchange 2007 when clients would attempt to connect to a mailbox it would be based on the server where that mailbox was homed. Specifically these attributes would contain information about the server where a particular...
Tim McMichael
Exchange 2010: Move-DatabasePath results in an InvalidOperationException when mount points are utilized for storage.
Posted
over 3 years ago
by
TIMMCMIC
3
Comments
In Exchange 2010 administrators may attempt to move either log files or database files using the command move-DatabasePath. In some instances the command may fail containing an InvalidOperationException. Here are some examples of the errors...
Tim McMichael
Exchange 2010: Implementing a dedicated backup network for a Database Availability Group…
Posted
over 2 years ago
by
TIMMCMIC
18
Comments
Occasionally, customers that deploy highly available Mailbox servers use a dedicated or secondary network for backup operations. The way in which you do this in Exchange 2010 has changes, and it’s important that when you implement such a configuration...
Tim McMichael
The Windows Cluster service encountered and error during function OpenCluster.
Posted
over 4 years ago
by
TIMMCMIC
0
Comments
When users attempt to use Exchange Management Shell (PowerShell) to perform management tasks against an Exchange 2007 SP1 Cluster on Windows 2008, certain functions return "The Windows Cluster service encountered an error during function OpenCluster"...
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