Symantec Altiris Boot image with error (EFI variable could not be read)

Error message: RDeploy: The EFI variable could not be read
原因：硬碟的partition format是EFI無法支援
解法：

1. 把硬碟接到其他電腦，開機後執行diskpart
2. DISKPART> list disk
3. DISKPART> select disk x
4. DISKPART> clean

參考：
http://www.symantec.com/connect/forums/efi-variable-could-not-be-read
http://pitumbo.com/how-delete-gpt-partition-or-efi-mac-hard-disks-vista-or-xp