GPT partition of Centos

Nowadays, hard disks are very cheap and the capacity is N large. common dos partition tables cannot meet the needs of large hard disks. The sin of a dos partition table is that 1. only a limited number of partitions are supported. for historical reasons, only 64 K (4x16 k) is reserved for the primary partition, that is, four primary partitions; 384 k (24x16 k) is reserved for logical partitions, that is, up to 23 logical partitions. 2. it is also a historical reason that 2 TB or more hard disk partitions are not supported. at that time, 2 TB is still an astronomical number, while GPT has the following advantages: 1. the partition table capacity can be expanded to 16 kB, But GPT can

Nowadays, hard disks are very cheap and the capacity is N large. common dos partition tables cannot meet the needs of large hard disks.

Dos partition table:

1. only a limited number of partitions are supported.

For historical reasons, only 64 K (4x16 k) is reserved for the primary partition, that is, 4 primary partitions; 384 k (24x16 k) is reserved for the logical partition ), that is, up to 23 logical partitions can be created.

2. hard disk partitions larger than 2 TB are not supported

This is also the historical reason. at that time, 2 TB is still an astronomical number.

The advantages of GPT are as follows:

1. scalable partition table capacity

A partition is still 16 k, but GPT can expand the capacity of the partition table. after creating a GPT partition table, you can create a small partition, such as 1 M, to store the partition table, the number of partitions has increased significantly.

2. there is nothing to say. it supports large partitions larger than 2 TB.

How to create a GPT partition under CentOS 6

1. parted or gparted

2. gdisk

Use the parted method

 
 

  
  
# /usr/sbin/parted -s /dev/sdb mklabel gpt  
 
 

Gdisk is the simplest, similar to fdisk.

 
 

  
  
# gdisk /dev/sdb 
 
 

Like fdisk, the derivatives include cgdisk and sgdisk.

You can use the epel source to install gdisk.

 
 

  
  
# yum install gdisk --enablerepo=epel
 
 

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