Bad disk IO performance for window vm

Hi,
I created some windows vm on OVM and find the disk IO performance is really bad.
For example:
I created a win2008 R2 64bit VM with DB, and installed OVM windows PV Drivers on it.
And I assign the CPU as 2.4G * 6, memory as 8G, HD as 100G.
If I create a 2G tablespace for DB, it will spent over 1 hour.
The installation for Oracle DB will spend 2 days.
I think it's caused by OVM server's HD.
It's 500G 2.5inch hard disk *4, and I did raid0+1 for it.
The OVS folder is 1T.
What should I do to improve the IO performance.
Thanks!

ssolbach wrote:
Have you changed your vm.cfg to have xvd* devices instead of hd* devices?
This needs to be done after you installed the windows PV drivers. Otherwise they will not get used.
SebastianNot changed. Could you tell how to change it? the vm.cfg file is as below:
more vm.cfg
acpi = 1
apic = 1
builder = 'hvm'
device_model = '/usr/lib/xen/bin/qemu-dm'
disk = ['file:/var/ovs/mount/C90740247070453FA9928DF8EB8D9D66/running_pool/100_a
ppaq-vm08/System.img,hda,w',
'file:/var/ovs/mount/C90740247070453FA9928DF8EB8D9D66/iso_pool/win2008R2_x64_jp/
ja_windows_server_2008_r2_standard_enterprise_datacenter_web__x64_dvd_x15-50370.
iso,hdc:cdrom,r',
kernel = '/usr/lib/xen/boot/hvmloader'
keymap = 'en-us'
maxmem = 6144
memory = 6144
name = '100_appaq-vm08'
on_crash = 'restart'
on_reboot = 'restart'
pae = 1
serial = 'pty'
timer_mode = 0
uuid = '9dacd19c-fbb1-4eeb-b24b-e7059b939c8b'
vcpus = 6
vif = ['bridge=xenbr0,mac=00:16:3E:6B:E5:38,type=ioemu']
vif_other_config = []
vnc = 1
vncconsole = 1
vnclisten = '0.0.0.0'
vncpasswd = 'oracle'
vncunused = 1

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Have your son cough up the $100. You broke it. You fix it!
Try:
"TestDisk is a free data recovery utility. It was primarily designed to help recover lost data storage partitions and/or make non-booting disks bootable again when these symptoms are caused by faulty software, certain types of viruses or human error (such as accidentally erasing a partition table)."
http://en.wikipedia.org/wiki/TestDisk
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Mess with a virtual hd.
Use disk utility to create. Not shown in the example.
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sudo pdisk -l
#for details...
man pdisk
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#eject the partition
Macintosh-HD -> Applications -> Utilities -> Terminal
dd if=/dev/disk0s10 bs=4096 | gzip | dd of=~/disk0-s10 bs=4096
#this can take awhile. Open another window and do ls -l ~/disk0-s10
# Here is how to restore the partition.
dd if=~/disk0-s10 bs=4096 | gunzip | dd of=/dev/disk0s10 bs=4096
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Ahansen,
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How can I optimize my hard disk drive usage and performance in Windows 8 or Windows 7?

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QuestionHow can I optimize my hard disk drive usage and performance in Windows 8 or Windows 7?
AnswerThere are a few simple steps you can take to ensure your hard disk drive is used optimally.
Use Toshiba HDD Protection
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For more information on this utility, see the following article:
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Hi Andrea,
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Why reward points?(Quoted from Discussions Terms of Use.)
The reward system helps to increase community participation. When a community member gives you (or another member) a reward for providing helpful advice or a solution to their question, your accumulated points will increase your status level within the community.
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My Windows 7 Professional desktop system hard disk got corrupted and I took the opportunity to install an SSD for a new system disk and reinstall Windows. The system is up and running on the SSD, with my old system disk now used for storage as it is stil

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