RE: [Xen-devel] Re: poor domU VBD performance.

["Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>]

> I can confim the problem only occur on SATA.
> I've added an old IDE UDMA66 drive, created LVM volume from 
> it and ran same dd tests :
> Dom0 : 12 MB/s
> DomU : 12 MB/s

SATA works fine for me on 2.0-testing.
I get 50MB/s reading from a raw partition in both cases using: 
 time dd if=/dev/sda6 of=/dev/null bs=1024k count=1024

Can you try a raw partition rather than LVM?

Thanks,
Ian

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