增加 VFAT 分割區

1. 增加一小塊 5M 的 VFAT 分割區，存放 UEFI 開機 efi 檔。

   [root@dywmac ~]# fdisk -uc /dev/sdb
   
   Command (m for help): p
   
   Disk /dev/sdb: 31.6 GB, 31625052160 bytes
   64 heads, 32 sectors/track, 30160 cylinders, total 61767680 sectors
   Units = sectors of 1 * 512 = 512 bytes
   Sector size (logical/physical): 512 bytes / 512 bytes
   I/O size (minimum/optimal): 512 bytes / 512 bytes
   Disk identifier: 0x55654248
   
      Device Boot      Start         End      Blocks   Id  System
   /dev/sdb1   *        2048      329727      163840   83  Linux
   /dev/sdb2          329728    29689855    14680064   8e  Linux LVM
   
   Command (m for help): n
   Command action
      e   extended
      p   primary partition (1-4)
   p
   Partition number (1-4): 3
   First sector (29689856-61767679, default 29689856): 
   Using default value 29689856
   Last sector, +sectors or +size{K,M,G} (29689856-61767679, default 61767679): +5M
   
   Command (m for help): t
   Partition number (1-4): 3
   Hex code (type L to list codes): ef
   Changed system type of partition 3 to ef (EFI (FAT-12/16/32))
   
   Command (m for help): p
   
   Disk /dev/sdb: 31.6 GB, 31625052160 bytes
   64 heads, 32 sectors/track, 30160 cylinders, total 61767680 sectors
   Units = sectors of 1 * 512 = 512 bytes
   Sector size (logical/physical): 512 bytes / 512 bytes
   I/O size (minimum/optimal): 512 bytes / 512 bytes
   Disk identifier: 0x55654248
   
      Device Boot      Start         End      Blocks   Id  System
   /dev/sdb1   *        2048      329727      163840   83  Linux
   /dev/sdb2          329728    29689855    14680064   8e  Linux LVM
   /dev/sdb3        29689856    29700095        5120   ef  EFI (FAT-12/16/32)
   
   Command (m for help): w
   

2. 格式化新增的 VFAT 分割區 /dev/sdc3。

   [root@dywmac ~]# mkfs.vfat -F16 -s2 /dev/sdc3