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Posted by: Chris
« on: December 20, 2014, 12:00:31 AM »

I don't know much about the different virtual disk formats but defragmenting the virtual disk itself should give the most performance boost. Defragmenting on the inside would depend on the format of the disk. A fixed sized disk should behave like physical one, for dynamic disks I can't say.
I'm also not planning to continue the test or introduce virtual disks testing.
Posted by: ecatherman
« on: December 19, 2014, 02:35:10 PM »

I would love to see some tests on how much defragmentation effects the speed of a running VM.

I would imagine very little on Hyper-V but maybe more for VirtualBox or VMware.