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How to mount a partition on a disk that has an EFI GPT partition table in Debian GNU/Linux

This is an example of how to mount a partition from a large disk that has an EFI GPT partition table instead of the conventional MBR (Master Boot Record) partition table. A large disk means a hard drive that is 1 Terabyte or more. EFI stands for Extensible Firmware Interface. GPT is short for Globally Unique Identifier Partition Table.

1. Check the kernel was compiled with EFI support. The standard kernel with Debian Lenny comes with EFI support built-in. The command to check is:

 cat /boot/config-2.6.26-2-686 | grep EFI

You know if the kernel was compiled with EFI support if you get these lines:

 CONFIG_EFI=y
 CONFIG_FB_EFI=y
 CONFIG_EFI_VARS=m
 CONFIG_EFI_PARTITION=y

2. The fdisk command shows only a placeholder partition. This is normal.

 fdisk -l /dev/sda
 WARNING: GPT (GUID Partition Table) detected on '/dev/sda'!
 The util fdisk doesn't support GPT. Use GNU Parted.
 Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
 255 heads, 63 sectors/track, 121601 cylinders
 Units = cylinders of 16065 * 512 = 8225280 bytes
 Disk identifier: 0x00000000

   Device Boot      Start         End      Blocks   Id  System
   /dev/sda1               1      121602   976762583+  ee  EFI GPT

3. List the real partitions on the disk using parted.

 parted /dev/sda print

You should get a result like this:

 Number  Start   End     Size    File system  Name     Flags
 1      17.4kB  1024MB  1024MB  ext3         primary
 2      1024MB  6144MB  5120MB  xfs          primary
 3      6144MB  6144MB  512B                 primary
 4      6144MB  6144MB  512B                 primary
 5      6144MB  7168MB  1024MB  linux-swap   primary
 6      7168MB  992GB   985GB   xfs          primary


To mount the second partition, use the mount command in the same way you usually would.

 mount -t xfs /dev/sda2 /mnt/test

* [http://www.pjc.me.uk/efi-gpt/ взято тут]
* [http://diflyon.livejournal.com/19521.html и тут]