[Xen-users] performance discrepancy between guest on partition and guest on file image

["wu shi" <phanteng@xxxxxxxxx>]

Hi,
I am wondering if it is normal that guest created on partition is slower  thatn guest created on a file(created using dd).

I have created two guest using virt-install.One is on my /dev/hda5 (guest name is partition)
while the other on /storage/vmdisk.img (dd if=/dev/zero of=/storage/vmdisk.img bs=1024k count=1024  )guest name is file

using hdparm -tT in these two guests shows the throughput of partition is 3-5Mb/s,while the number on guest file is around 30.

This discrepancy is quite huge.
Is this normal?

thanks
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