Update: 26th June 2008. Hyper-V RTM is now available. This post refers to pre-release software for Hyper-V, formerly known as Windows Server virtualization. However, there is no difference in the guidance provided in this post.
Following on from my post last week, I had some good questions asking about the difference between the SCSI adapter in Virtual Server and the SCSI controller in Windows Server virtualization. In Virtual Server 2005, the best practice is to configure Virtual Machines to boot from the SCSI adapter for performance reasons. This is not the case in Windows Server virtualization. This post takes a dip into explaining why. To start with, let’s take a look at the SCSI adapter in Virtual Server
So keeping that in mind, let’s compare and contrast the above with the IDE and SCSI controllers in Windows Server virtualization.
Hopefully that gives a bit more insight into why the best practice recommendation of booting from SCSI in Virtual Server no longer applies in Windows Server virtualization and why booting from IDE does not incur the same performance overhead as in Virtual Server. Cheers, John.
Very informative post here. The most interesting for WSv/Viridian/Hypervisor in Windows 2008, is the fact that the IDE virtual driver is "better" than the SCSI counterpart, which is the opposite of what the case was with Virtual Server. The part of
Like some of you know, whenever you created a new Virtual Machine with Virtual Server 2005 and selected
Like some of you know, whenever you created a superiority new Virtual Machine with Virtual Server 2005
So boot with IDE. Use SCSI for other drives?
Cannedsoda - you can only boot from IDE. For data, use either IDE or SCSI. For I/O path throughput, it will make no difference.
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I had a really nice mail over new year from an influential IT Pros with more than a passing interest
Windows Server 2008’s Hyper-V has been in public beta for a while now and lots of people have been experimenting
Jose Barreto's wrote a great article on the Storage Options for Windows Server 2008 and Hyper-V. Its