linux下将mbr分区转换为gpt分区

一、查看现有分区

[root@localhost /]# fdisk -l

磁盘 /dev/sda:299.4 GB, 299439751168 字节,584843264 个扇区
Units = 扇区 of 1 * 512 = 512 bytes
扇区大小(逻辑/物理):512 字节 / 512 字节
I/O 大小(最小/最佳):512 字节 / 512 字节
磁盘标签类型:dos
磁盘标识符:0x000e7372

   设备 Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048     2099199     1048576   83  Linux
/dev/sda2         2099200   584843263   291372032   8e  Linux LVM

磁盘 /dev/mapper/centos-root:53.7 GB, 53687091200 字节,104857600 个扇区
Units = 扇区 of 1 * 512 = 512 bytes
扇区大小(逻辑/物理):512 字节 / 512 字节
I/O 大小(最小/最佳):512 字节 / 512 字节


磁盘 /dev/mapper/centos-swap:16.8 GB, 16844324864 字节,32899072 个扇区
Units = 扇区 of 1 * 512 = 512 bytes
扇区大小(逻辑/物理):512 字节 / 512 字节
I/O 大小(最小/最佳):512 字节 / 512 字节


磁盘 /dev/mapper/centos-home:227.8 GB, 227826204672 字节,444973056 个扇区
Units = 扇区 of 1 * 512 = 512 bytes
扇区大小(逻辑/物理):512 字节 / 512 字节
I/O 大小(最小/最佳):512 字节 / 512 字节

[root@localhost /]# 

磁盘标签类型:dos 既为mbr分区

二、利用gdisk工具进行分区转换

[root@localhost /]# yum install -y gdisk

转换/dev/sda2分区,sda1分区为系统启动分区,不需要转换

[root@localhost /]# gdisk /dev/sda2
GPT fdisk (gdisk) version 0.8.10

Partition table scan:
  MBR: not present
  BSD: not present
  APM: not present
  GPT: not present

Creating new GPT entries.

Command (? for help): w

Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING
PARTITIONS!!

Do you want to proceed? (Y/N): 

输入y,开始

OK; writing new GUID partition table (GPT) to /dev/sda2.
Warning: The kernel is still using the old partition table.
The new table will be used at the next reboot.
The operation has completed successfully.
[root@localhost /]# 

查看分区类型

[root@localhost /]# fdisk -l  /dev/sda2
WARNING: fdisk GPT support is currently new, and therefore in an experimental phase. Use at your own discretion.

磁盘 /dev/sda2:298.4 GB, 298364960768 字节,582744064 个扇区
Units = 扇区 of 1 * 512 = 512 bytes
扇区大小(逻辑/物理):512 字节 / 512 字节
I/O 大小(最小/最佳):512 字节 / 512 字节
磁盘标签类型:gpt
Disk identifier: CCBAA7C6-614C-4A45-BD26-2B2EDE14236D


#         Start          End    Size  Type            Name
[root@localhost /]# 

已经转换为GPT类型了,并且数据完好无损。

 

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