virt-v2v: error: unable to mount the disk image for writing. This has probably happened because Windows Hibernation or Fast Restart is being used in this guest. You have to disable this (in the guest) in order to use virt-v2v.

Original error message: mount: mount exited with status 14: The disk contains an unclean file system (0, 0). Metadata kept in Windows cache, refused to mount.Failed to mount '/dev/sda2': Operation not permitted. The NTFS partition is in an unsafe state. Please resume and shutdown Windows fully (no hibernation or fast restarting), or mount the volume read-only with the 'ro' mount option.
WARNING: No any other purpose,keeping reminded! So sorry to offended,if necessary, contact me and I do change what I had done to protect your privileges!