（十一）Linux GPT磁盘分区
MBR分区表有一定的局限性，最大支持2.1tb硬盘，单块硬盘最多4个主分区。
这里就要引入GPT分区表，可以支持最大18EB的卷，最多支持128个主分区，所以如果使用大于2tb的卷，就必须使用GTP分区。
对/dev/sdb进行分区
parted /dev/sdb
进入交互模式：
(parted)
交互模式下常用命令：
实例：
[root@linux-node2 ~]# parted /dev/sdb #对sdb分区
GNU Parted 3.1
Using /dev/sdb
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) p #print 打印
Model: VMware, VMware Virtual S (scsi)
Disk /dev/sdb: 3221MB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:
Number Start End Size Type File system Flags
(parted) mklabel #定义分区表类型，msdos是MBR分区表，可以用这个方法将硬盘转换成MBR
New disk label type? gpt #分区表定义为gpt，之前是mbr分区，所以会有下面的提醒
Warning: The existing disk label on /dev/sdb will be destroyed and all data on this
disk will be lost. Do you want to continue?
Yes/No? yes #警告sdb之前的内容将会丢失
(parted) mkpart #创建分区
Partition name? []? sdb1 #分区表名称
File system type? [ext2]? Ext4 #ext4文件系统类型
Start? 0 #起始扇区
End? 1g #结束扇区
Warning: The resulting partition is not properly aligned for best performance.
Ignore/Cancel? I #警告内容将删除，选择忽略
(parted) p #print打印分区信息
Model: VMware, VMware Virtual S (scsi)
Disk /dev/sdb: 3221MB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:
Number Start End Size File system Name Flags
1 17.4kB 1000MB 1000MB ext4 sdb1
(parted) rm 1 #删除分区1
(parted) mkpart primary 0 1g #创建主分区1gb
Warning: The resulting partition is not properly aligned for best performance.
Ignore/Cancel? I #警告内容会被删除，选择忽略
(parted) mkpart primary 1g 3g #创建主分区2gb
(parted) p #打印
Model: VMware, VMware Virtual S (scsi)
Disk /dev/sdb: 3221MB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:
Number Start End Size File system Name Flags
1 17.4kB 1000MB 1000MB ext4 primary
2 1000MB 3220MB 2220MB ext4 primary
(parted) q #退出
Information: You may need to update /etc/fstab.
-------------------------------------------------------------------------------
[root@linux-node2 ~]# fdisk -l /dev/sdb #查看/dev/sdb分区
WARNING: fdisk GPT support is currently new, and therefore in an experimental phase. Use at your own discretion.
Disk /dev/sdb: 3221 MB, 3221225472 bytes, 6291456 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: gpt
# Start End Size Type Name
1 34 1953125 953.7M Microsoft basic primary
2 1953792 6289407 2.1G Microsoft basic primary
[root@linux-node2 ~]# mkfs.ext4 /dev/sdb1 #格式化sdb1
mke2fs 1.42.9 (28-Dec-2013)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
61056 inodes, 244136 blocks
12206 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=251658240
8 block groups
32768 blocks per group, 32768 fragments per group
7632 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376
Allocating group tables: done
Writing inode tables: done
Creating journal (4096 blocks): done
Writing superblocks and filesystem accounting information: done
[root@linux-node2 ~]# blkid /dev/sdb1 #查看sdb1的UUID
/dev/sdb1: UUID="612067e2-12ca-4410-9ab8-682b22c0da87" TYPE="ext4" PARTLABEL="primary" PARTUUID="ae6af195-c535-4380-8a8f-e96c73730d96"
[root@linux-node2 ~]# echo 'UUID=612067e2-12ca-4410-9ab8-682b22c0da87 /data ext4 defaults 0 0' >> /etc/fstab#实现开机自动挂载
