I have Ibm X3200, with RAID 1 on disk 1+2
Host OS (server 2008 with hyper-v) are installed on RAID disks.
VHD file are 60GB, and fixed size. In virtual machine are installed Server 2008.
Problem is that copy on virtual machine on same disk, from one folder to another folder is slow, only 5-6 MB/sec , but if copy from this disk to another disk than is ok speed (40-60 MB/sec).
I suspect that is problem in RAID controller because if VHD file is on disk that is not configured as RAID, speed is ok.