作者：Tank http://hi.baidu.com/uroot 转载请注明本出处
      
     1.首先使用Winwe2ps或者参考文章中脚本将Microsoft Virtual PC 2007中安装的Ubuntu Linux的VHD的未用空间清零。
       注意Winwe2ps的Readme,操作危险提示，请先备份数据再使用此工具：There are currently no known bugs in this program, but due to its very
nature, any problem or malfunction may result in serious data loss.
Therefore you are advised to do a complete backup before using this
program on any filesystems that contain data you want to keep.
     2.然后使用Microsoft Virtual PC 2007的控制台磁盘管理向导，压缩Linux的VHD即可。此步骤请参考
HOWTO:如何压缩 Microsoft Virtual PC 2007 虚拟硬盘文件(.VHD文件) -2007.8.16 .



Tank的其他关于VPC2007虚拟硬盘压缩的文章：
HOWTO:如何压缩 Microsoft Virtual PC 2007 虚拟硬盘文件(.VHD文件) -2007.8.16
相关软件地址：

Wipe2fs - Wipe Unused Space in Ext2/3 Filesystems

参考文章：
Compacting the virtual hard disk of a Linux virtual machine
http://blogs.msdn.com/virtual_pc_guy/archive/2005/08/23/454846.aspx