Hi All,

I am confused.

I am getting to the point were I am about to set up
my first KVM server.  My fist adventure will be to
migrate an XP guest I currently have running on my old
server under Virtual Box 3.2.12.

What I need help with is getting the optimum performance
settings while converting over my old hard (virtual) drive.

This is what I have gathered from these parts as to the best
settings:

- controller: virtio
- kvm option: cache=none
- qcow2 disk format with metadata preallocation
- create your disk image with:
      qemu-img create -f qcow2 -o \
      size=40000000000,preallocation=metadata vdisk.img

So far so good.  Now what I am concerned about is
retaining the optimum settings from a converted
hard drive.  Also gathered from these parts is the
best way to convert the hard drive:

    qemu-img convert -f vdi oldImage.vdi -O qcow2 newImage.qcow

I am afraid I will loose all the optimum settings.

And, I am vague how a *.qcow file/drive and a *.img file/drive
relate.

Many thanks,
-T