parted创建LinuxTB硬盘GPT分区

1、介绍2种分区表：

MBR分区表：（MBR含义：主引导记录）
所支持的最大卷：2T （T; terabytes,1TB=1024GB）
对分区的设限：最多4个主分区或3个主分区加一个扩展分区。

GPT分区表：（GPT含义：GUID分区表）
支持最大卷：18EB，（E：exabytes,1EB=1024TB）
每个磁盘最多支持128个分区

所以如果要大于2TB的卷或分区就必须得用GPT分区表。

2、Linux下fdisk工具不支持GPT，得使用另一个GNU发布的强大分区工具parted。

fdisk工具用的话，会有下面的警告信息：

WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted.

3、parted工具对/dev/sda做GPT分区的过程：

parted /dev/sdb # 使用parted来对GPT磁盘操作，进入交互式模式

GNU Parted 1.8.1 Using /dev/sdb Welcome to GNU Parted! Type ‘help’ to view a list of commands.

(parted) mklabel gpt           # 将MBR磁盘格式化为GPT

(parted) print                       #打印当前分区

(parted) mkpart primary 0 5TB                # 分一个5T的主分区

(parted) mkpart primary 5TB 12TB      # 分一个8T的主分区

(parted) print                         #打印当前分区

(parted) quit 退出

Information: Don’t forget to update /etc/fstab, if necessary.

4、操作实例：

root@node01:/mnt# parted /dev/sda GNU Parted 2.3 Using /dev/sda Welcome to GNU Parted! Type 'help' to view a list of commands.

(parted) mklabel gpt                                                       Warning: The existing disk label on /dev/sda will be destroyed and all data on this disk will be lost. Do you want to continue? Yes/No? yes         

   

(parted) print                                                             Model: DELL PERC 6/i Adapter (scsi) Disk /dev/sda: 500GB Sector size (logical/physical): 512B/512B Partition Table: gpt Number  Start  End  Size  File system  Name  Flags

(parted)mkpart primary 0KB 500GB Warning: You requested a partition from 0.00B to 500GB.                    The closest location we can manage is 17.4kB to 500GB. Is this still acceptable to you? Yes/No? yes                                                                Warning: The resulting partition is not properly aligned for best performance. Ignore/Cancel? Ignore                          

(parted) print                                                             Model: DELL PERC 6/i Adapter (scsi) Disk /dev/sda: 500GB Sector size (logical/physical): 512B/512B Partition Table: gpt Number  Start   End    Size   File system  Name     Flags  1      17.4kB  500GB  500GB               primary

(parted)quit                                                              Information: You may need to update /etc/fstab.                            root@node01:/#fdisk -l WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted. Disk /dev/sda: 499.6 GB, 499558383616 bytes 255 heads, 63 sectors/track, 60734 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000    Device Boot      Start         End      Blocks   Id  System /dev/sda1               1       60735   487849983+  ee  GPT

5、然后格式化成ext4,需要安装包e4fsprogs.x86_64(yum install e4fsprogs.x86_64)即可。

# mkfs.ext4 /dev/sdb1

# mkfs.ext4 /dev/sdb2

6、接着用mount挂载分区

# mount -t ext4 /dev/sdb1 /bk

# mount -t ext4 /dev/sdb2 /ak

# df -h

7、最后修改/etc/fstab，添加如下两行，让其开机自动挂载.

#vi /etc/fstab

/dev/sdb1       /bk          ext4            defaults,noatime       1 2

/dev/sdb2      /ak       ext4           defaults,noatime         1 2

8、硬盘总分区大小10TB

扩展：parted非交互分区

parted /dev/sdb mklabel gpt

parted /dev/sdb mkpart primary 0 5000000

parted /dev/sdb mkpart primary 5000000 7000001

parted /dev/sdb mkpart primary 7000000 8000000

parted /dev/sdb p