VirtualBox将旧的vdi文件加入到新的系统中会报：UUID already exists 。

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重新创建uuid:

cd C:\Program Files\Oracle\VirtualBox\
VBoxManage.exe internalcommands sethduuid x:\path\xxx.vdi

命令说明：

Usage: VBoxManage internalcommands  [command arguments]

Commands:

  loadmap   
 [module] [subtrahend] [segment]
      This will instruct DBGF to load the given map file
      during initialization.  (See also loadmap in the debugger.)

  loadsyms   [delta] [module] [module address]
      This will instruct DBGF to load the given symbol file
      during initialization.

  sethduuid  []
       Assigns a new UUID to the given image file. This way, multiple copies
       of a container can be registered.

  sethdparentuuid  
       Assigns a new parent UUID to the given image file.

  dumphdinfo 
       Prints information about the image at the given location.

  listpartitions -rawdisk 
       Lists all partitions on .

  createrawvmdk -filename  -rawdisk 
                [-partitions  [-mbr ] ]
                [-relative]
       Creates a new VMDK image which gives access to an entire host disk (if
       the parameter -partitions is not specified) or some partitions of a
       host disk. If access to individual partitions is granted, then the
       parameter -mbr can be used to specify an alternative MBR to be used
       (the partitioning information in the MBR file is ignored).
       The diskname is on Linux e.g. /dev/sda, and on Windows e.g.
       \\.\PhysicalDrive0).
       On Linux or FreeBSD host the parameter -relative causes a VMDK file to
       be created which refers to individual partitions instead to the entire
       disk.
       The necessary partition numbers can be queried with
         VBoxManage internalcommands listpartitions

  renamevmdk -from  -to 
       Renames an existing VMDK image, including the base file and all its exten
ts.

  converttoraw [-format ]  
       Convert image to raw, writing to file.

  converthd [-srcformat VDI|VMDK|VHD|RAW]
            [-dstformat VDI|VMDK|VHD|RAW]
             
       converts hard disk images between formats

  repairhd [-dry-run]
           [-format VDI|VMDK|VHD|...]
           
       Tries to repair corrupted disk images

  modinstall
       Installs the necessary driver for the host OS

  moduninstall
       Deinstalls the driver

  debuglog  [--enable|--disable] [--flags todo]
           [--groups todo] [--destinations todo]
       Controls debug logging.

  passwordhash 
       Generates a password hash.

  gueststats  [--interval ]
       Obtains and prints internal guest statistics.
       Sets the update interval if specified.

标题名称：UUIDalreadyexists
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