Vista - Hyper-V and Disk types

Basically, I am curious how the performance works out on Hyper-V. If for
example, I had a SAS drive setup to host my VM's hard drive, if I configured
the VM for IDE I would take a performance hit correct? And if this is the
case, what is the reason to have any VM's use IDE as it is possible that
later on they could be placed on a faster BUS. The only reason I can think
is compatability, for example if you cannot use SCSI devices in your OS or
something. Please enlighten me.

Thanks!

You're incorrect. The actual choice of IDE v. SCSI has nothing whatsoever to
do with the underlying physical hardware. It is purely a question of which
drivers are available at that point in the process. Thus you always have to
choose IDE for a system boot drive, because of how the synthetic SCSI driver
works. But there is no performance hit at all.

I tend to use IDE for the system drive, and add a SCSI bus and drives VMs
that need more than 2 drives/VHDs.

You can not choose SCSI for any OS that doesn't have available Integration
Components, since the drivers won't be available.

--
Charlie.
http://msmvps.com/blogs/xperts64
http://mvp.support.microsoft.com/profile/charlie.russel

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Got it! Thank you!!!


"Charlie Russel - MVP" <charlie@xxxxxx> wrote in message
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