I/O speed in Virtualization

As I am studying for my MS 70-431 certification I have come up with a question that hopefully some of the virtualization experts can help me with.
It is possible to install a database on multiple filegroups located on multiple physical drives to increase read access because by using multiple drives you have multiple read/write heads to look up data.
If I install SQL server in a virtual environment and use multiple virtual hard drives in the virtual machine would I still get the same increase in read access as I would if I used multiple physical drives?
I think no, because the virtual machine is physically located on 1 drive. So there is only one read/write head.

Thanks for any input.

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Comments

dynamik

You could put the virtual HDs on different physical HDs/RAID arrays though.

blargoe

That's right, unless there's the physical separation, you're gaining nothing.

Grynder

Thanks for the input.

"You could put the virtual HDs on different physical HDs/RAID arrays though."

I did not know this was an option. I looked into it and it seems like a straight forward process.