virtualbox 的虚拟硬盘

格式转换

vboxmanage clonehd <uuid>|<filename> <outputfile>
                            [--format VDI|VMDK|VHD|RAW|<other>]
                            [--variant Standard,Fixed,Split2G,Stream,ESX]
                            [--type normal|writethrough|immutable]
                            [--remember] [--existing]