使用parted 创建一个大于2T的分区

1、查看现有分区

parted -l

fdisk   -l

 

 

2、对/dev/sdb分一个区

[root@test ~]# parted /dev/sdb

 

(parted) mkpart  【因为没有修改磁盘格式所以报错】                                                        

Error: /dev/sdb: unrecognised disk label

 

(parted) mklabel     //修改磁盘格式                                                       

New disk label type? gpt                                                 

(parted) p                                                               

Model: VMware, VMware Virtual S (scsi)

Disk /dev/sdb: 21.5GB

Sector size (logical/physical): 512B/512B

Partition Table: gpt

 

Number  Start  End  Size  File system  Name  Flags

 

(parted) mkpart 

Partition name?  []? primary       //定义一个分区名字                                            

File system type?  [ext2]? ext4                                                                

Start? 0                                                                 

End? 20G                                                                 

Warning: The resulting partition is not properly aligned for best performance.

Ignore/Cancel? I                                                         

(parted) P                                                               

Model: VMware, VMware Virtual S (scsi)

Disk /dev/sdb: 21.5GB

Sector size (logical/physical): 512B/512B

Partition Table: gpt

 

Number  Start   End     Size    File system  Name  Flags

 1      17.4kB  20.0GB  20.0GB               primary

 

(parted) quit  #退出分区模式，不需要输入保存的按钮，退出来它会自动保存分区表信息。

在parted分区后，系统不需要重启也生效

 

 

3、对/dev/sdb进行分区，分多个区

(parted) p                                                               

Model: VMware, VMware Virtual S (scsi)

Disk /dev/sdb: 21.5GB

Sector size (logical/physical): 512B/512B

Partition Table: gpt

 

Number  Start  End  Size  File system  Name  Flags

 

(parted) mkpart                                                          

Partition name?  []? test1                                               

File system type?  [ext2]? ext4                                          

Start? 0                                                                 

End? 5G                                                                  

Warning: The resulting partition is not properly aligned for best performance.

Ignore/Cancel? I                                                         

(parted) mkpart

Partition name?  []? test2                                               

File system type?  [ext2]? ext4                                          

Start? 5G                                                                

End? 10G                                                                 

(parted) mkpart

Partition name?  []? test3

File system type?  [ext2]? ext4                                          

Start? 10G                                                               

End? 15G                                                                 

(parted) mkpart                                                          

Partition name?  []? test4                                               

File system type?  [ext2]? ext4                                          

Start? 15G

End? 100%                                                                 

(parted) P                                                               

Model: VMware, VMware Virtual S (scsi)

Disk /dev/sdb: 21.5GB

Sector size (logical/physical): 512B/512B

Partition Table: gpt

 

Number  Start   End     Size    File system  Name   Flags

 1      17.4kB  5000MB  5000MB               test1

 2      5001MB  10.0GB  5000MB               test2

 3      10.0GB  15.0GB  5000MB               test3

 4      15.0GB  20.0GB  5000MB               test4

 

(parted) quit 

 

 

4、格式化分区并挂载

 

[root@test ~]# mkfs -t ext4 /dev/sdb1

[root@test ~]# mkdir /root/testu

[root@test ~]# mount -t ext4 /dev/sdb1 /root/testu/

[root@test ~]# df -Th

Filesystem                  Type   Size  Used Avail Use% Mounted on

/dev/mapper/vg_test-lv_root ext4    75G  3.6G   68G   6% /

tmpfs                       tmpfs  2.0G   72K  2.0G   1% /dev/shm

/dev/sda1                   ext4   485M   37M  423M   9% /boot

/dev/sdb1                   ext4   4.6G  138M  4.3G   4% /root/testu

 

 

5、打印并且删除分区

(parted) p                                                               

Model: VMware, VMware Virtual S (scsi)

Disk /dev/sdb: 21.5GB

Sector size (logical/physical): 512B/512B

Partition Table: gpt

 

Number  Start   End     Size    File system  Name  Flags

 1      17.4kB  20.0GB  20.0GB               pa

 

(parted) rm   1 

 

(parted) p                                                               

Model: VMware, VMware Virtual S (scsi)

Disk /dev/sdb: 21.5GB

Sector size (logical/physical): 512B/512B

Partition Table: gpt

 

Number  Start  End  Size  File system  Name  Flags

 

 

 

6、 linux中有两种分区方式：MBR和GPT

 

MBR: （Master Boot Record）主引导记录，是传统的分区机制，应用于绝大多数使用BIOS的PC设备，使用32位表示扇区数。

  特点：

     MBR支持32位和64位系统

     MBR支持分区数量有限

     MBR只支持不超过2T的硬盘，超过2T的硬盘将只能用2T空间（有第三方解决方法）

 

 

GPT:GUID（Globals Unique Identifiers）Partition Table 全局唯一标识，是一个较新的分区机制，解决了MBR很多缺点。

   使用128位UUID 表示磁盘和分区，GPT分区表自动备份在头和尾两份，并有CRC校验位。

支持超过2T的磁盘（64位寻址空间），使用64位，支持128个分区，支持8Z（512Byte/block ）64Z（4096Byte/block）。fdisk最大只能建立2TB大小的分区，创建一个大于2TB的分区使用parted，gdisk分区工具

   特点： 

       向后兼容MBR

       必须在支持UEFI的硬件上才能使用（Intel提出，用于取代BIOS）

       必须使用64位系统

       Mac、Linux系统都能支持GPT分区格式

       Windows 7/8 64bit、Windows Server 2008 64bit支持GPT