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Good Migrations: How To Move To Windows Server 2008
12:00 AM EDT Mon. Mar. 24, 2008
From the March 24, 2008 issue of TechBuilder
Page 2 of 3
StagingSolution providers that work the kinks out first during a virtual migration, before they start an actual migration, will avoid much aggravation.
"We staged each migration before doing it live," Mazzanti said. Each migration, Mazzanti said, was performed in a virtual environment first using either Microsoft Virtual Server 2005 R2 or VMware, depending on the customer's resources and environment.
A critical task during the staged migrations, he found, was also a simple one: reading. "For Windows Server 2008, you have to read the manual," Mazzanti said.
Hardware, security, compatibility—all can be played with during a virtual, staged migration with details specific to a customer's infrastructure and needs. Checklists can be written, procedures verified.
Exchange
Not every enterprise runs Exchange as its e-mail and messaging solution. But Exchange as an element of Server 2008 migration warrants its own special step here because of the potential for disaster. Microsoft has said that if you upgrade a box that runs Exchange 2007 SP1, from Server 2003 to Server 2008, you risk breaking Exchange. Here's what Microsoft says you should do, in its own words:
"When upgrading stand-alone servers, it is not supported to upgrade your operating system to Windows Server 2008 and then upgrade Exchange 2007 to SP1. It is also not supported to upgrade Exchange 2007 to SP1 and then upgrade your operating system to Windows Server 2008. To deploy Exchange 2007 SP1 on Windows Server 2008, you must install Windows Server 2008 on a computer that does not have Exchange installed, and then install Exchange 2007 SP1.
"For clustered mailbox servers, Exchange SP1 introduces support for clustered mailbox servers running on Windows Server 2008. However, as a result of the significant changes introduced in Windows Server 2008 failover clusters (called server clusters in previous versions of Microsoft Windows), rolling upgrades of a failover cluster from Windows Server 2003 to Windows Server 2008 are not possible. Therefore, to upgrade a clustered mailbox server from Windows Server 2003 to Windows Server 2008, you must build a new failover cluster using Windows Server 2008 as the operating system for all nodes, and then migrate the data from the old cluster to the new cluster." Got all that?
Next: Installation
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