关于kvm虚拟机的问题，困扰很久，求助高手！

问题是这样的，我电脑有两个系统，我在RHEL6.2系统下，mount我的ntfs分区，想把虚拟机的硬盘文件放在ntfs分区下：
下面是分区挂载内容：
/dev/sda6 /mnt/virtual ntfs-3g defaults 0 0

我的操作如下：
[root@localhost virtual]# pwd
/mnt/virtual

[root@localhost virtual]# qemu-img create -f raw test.img 10G
Formatting 'test.img', fmt=raw size=10737418240

[root@localhost virtual]# virt-install --name test --ram 512 --disk path=/mnt/virtual/test.img --boot hd

开始安装......
ERROR internal error Process exited while reading console log output: char device redirected to /dev/pts/2
qemu-kvm: -drive file=/mnt/virtual/test.img,if=none,id=drive-ide0-0-0,format=raw,cache=none: could not open disk image /mnt/virtual/test.img: Invalid argument

Domain installation does not appear to have been successful.
If it was, you can restart your domain by running:
virsh --connect qemu:///system start test
otherwise, please restart your installation.


同样的操作我把img文件放在ext4分区就没有问题，请问如何解决呢？谢谢