XML格式编辑VM
找到磁盘定义

  <driver name='qemu' type='raw' cache='writeback' discard='unmap'/>
  <source file='/mnt/user/domains/Windows 10/vdisk1.img'/>
  <target dev='hdc' bus='scsi'/>
  <boot order='1'/>
  <address type='drive' controller='0' bus='0' target='0' unit='2'/>


添加磁盘参数 rotation_rate='1' to the target dev line, like this

  <driver name='qemu' type='raw' cache='writeback' discard='unmap'/>
  <source file='/mnt/user/domains/Windows 10/vdisk1.img'/>
  <target dev='hdc' bus='scsi' rotation_rate='1'/>
  <boot order='1'/>
  <address type='drive' controller='0' bus='0' target='0' unit='2'/>