準備 CentOS 6 efidisk

1. CentOS 6 ISO 檔有 efidisk.img 檔，DYW 系統中也有。

   [root@dywmac ~]# cd /var/ftp/pub/centos6/images/
   [root@dywmac images]# ll efidisk.img
   -rw-r--r--. 1 root root 33896448 Aug 25  2012 efidisk.img
   

2. 使用 parted 查看 efidisk.img 分割是由 17408 Byte 開始。

   [root@dywmac images]# parted efidisk.img 
   GNU Parted 2.1
   Using /var/ftp/pub/centos6/images/efidisk.img
   Welcome to GNU Parted! Type 'help' to view a list of commands.
   (parted) u                                                                
   Unit?  [compact]? B                                                       
   (parted) print                                                            
   Model:  (file)
   Disk /var/ftp/pub/centos6/images/efidisk.img: 33896448B
   Sector size (logical/physical): 512B/512B
   Partition Table: gpt
   
   Number  Start   End        Size       File system  Name                  Flags
    1      17408B  33879551B  33862144B  fat16        EFI System Partition  boot
   
   (parted) quit
   

3. 掛載 efidisk.img 中的第一個分割區在 /mnt/efi 目錄。

   [root@dywmac images]# mount -oloop,offset=17408 efidisk.img /mnt/efi/
   

4. 查看 /mnt/efi 目錄有 UEFI 開機相關檔案。

   [root@dywmac images]# ll /mnt/efi/
   total 2
   drwxr-xr-x. 3 root root 2048 May 13  2010 EFI
   [root@dywmac images]# ll /mnt/efi/EFI/BOOT/
   total 32900
   -rwxr-xr-x. 1 root root      156 May 13  2010 BOOTX64.conf
   -rwxr-xr-x. 1 root root   226825 May 13  2010 BOOTX64.efi
   -rwxr-xr-x. 1 root root 29881604 May 13  2010 initrd.img
   -rwxr-xr-x. 1 root root    63584 May 13  2010 splash.xpm.gz
   -rwxr-xr-x. 1 root root  3510976 May 13  2010 vmlinuz