Comments on: Hyper-V pass-through disk performance vs. fixed size VHD files and dynamic VHD files in Windows Server 2008 R2

By: daveberm

daveberm — Sat, 05 Dec 2009 00:27:45 +0000

I have not done any comparisons of R1 and R2 and have not tested booting from fixed vs. dynamic disks. I always boot from dynamic disks in my lab and have not noticed any apparent delay. Let us know if performance improves for you.

By: Ryan

Ryan — Sat, 05 Dec 2009 00:08:00 +0000

I’m getting much slower boot time (2x-3x or more) after exporting a VM (and converting the fixed disks to dynamic) from a Hyper-V r1 host to an R2 host. I haven’t had a chance yet to test the same VMs if I kept them as fixed disks. Have you also seen this behavior? I haven’t had a chance to test performance after boot, though….

By: daveberm

daveberm — Sun, 29 Nov 2009 04:12:56 +0000

Great idea. I’ll add it to my list of blog ideas and try to get to it soon. Thanks!

By: Miha Pecnik

Miha Pecnik — Fri, 27 Nov 2009 17:24:21 +0000

Would it be possible for you to perform these same steps on a non R2 Windows 2008 machine so we’d see by how much they’ve really improved it in R2?

By: Zeros & Ones : Hyper-V pass-through disk performance vs. fixed size VHD files and dynamic VHD files in Windows Server 2008 R2

Sun, 22 Nov 2009 07:22:56 +0000

[...] it there Filed Under: Virtualization, Windows 2008 R2, Hyper-V, Tips & [...]

By: Hyper-V pass-through disk performance vs. fixed size VHD files and dynamic VHD files in Windows Server 2008 R2 « Zeros & Ones

Sun, 22 Nov 2009 07:21:04 +0000

[...] Check it there [...]