VirtualBox在克隆磁碟的問題

bullock@ubuntu:/opt/vbox$ VBoxManage clonehd RHEL4U6_2.vdi RHEL4U6_02.vdi
VirtualBox Command Line Management Interface Version 2.1.4
(C) 2005-2009 Sun Microsystems, Inc.
All rights reserved.

[!] FAILED calling a->virtualBox->OpenHardDisk2(src, srcDisk.asOutParam()) at line 369!
[!] Primary RC = VBOX_E_IPRT_ERROR (0x80BB0005) - Runtime subsystem error
[!] Full error info present: true , basic error info present: true
[!] Result Code = VBOX_E_IPRT_ERROR (0x80BB0005) - Runtime subsystem error
[!] Text = Could not get the storage format of the hard disk '/home/bullock/.VirtualBox/HardDisks/RHEL4U6_2.vdi' (VERR_FILE_NOT_FOUND)
[!] Component = HardDisk2, Interface: IHardDisk2, {ed6e2525-c2fd-42a4-917a-7a9045ac9e15}
[!] Callee = IVirtualBox, {339abca2-f47a-4302-87f5-7bc324e6bbde}

看紅字部份，我判斷是預設的路徑作怪。
使得VBoxManage指令誤判，找不到要操作用的參數磁碟。
果然，進VirtualBox的圖形介面，把預設的路徑改掉之後，就成功了！
成功操作結果如下：
bullock@ubuntu:/opt/vbox$ VBoxManage clonehd RHEL4U6_1.vdi RHEL4U6_01.vdi
VirtualBox Command Line Management Interface Version 2.1.4
(C) 2005-2009 Sun Microsystems, Inc.
All rights reserved.

0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100%
Clone hard disk created in format 'VDI'. UUID: d715fbe6-951f-4c35-9793-b2358971a52a
bullock@ubuntu:/opt/vbox$

它會產生新的一組 UUID ！
這是關鍵，因為UUID不同，克隆出來的磁碟才能在和原始磁碟並存狀態下被使用。