MBR分區表：（MBR含義：主引導記錄）
所支持的最大卷：2T
（T; terabytes,1TB=1024GB）
對分區的設限：最多4個主分區或3個主分區加一個擴展分區。
GPT分區表：（GPT含義：GUID分區表）
支持最大卷：18EB，（E：exabytes,1EB=1024TB）
每個磁盤最多支持128個分區
使用 parted 建立大小超過2T的分區
1，parted /dev/sdb
可以輸入p打印磁盤信息，查看分區的情況，找到起始和結束位置。
2，mklabel gpt
設置分區類型為gpt
3，mkpart primary 0% 100%
primary指分區類型為主分區，0是分區開始位置，100%是分區結束位置。相同的命令為：mkpart primary 0-1 或者是：mkpart primary 0 XXXXXX結束的空間
4，print
打印當前分區,查看分區設置是否正確
5，quit
完成后用quit命令退出。
6，mkfs.ext3 /dev/sdb1
格式化磁盤。如果支持EXT4可選擇格式化為EXT4，格式化成ext3的時候又出現問題。Ext3默認的block size的大小為4k,最大只能支持8T的空間。格式化時指定block size的大小為8K這樣最大可以支持16T的空間。相應命令：mkfs.ext3 -b 8192 /dev/sdb2
第一步，parted
[root@localhost ~]# parted /dev/md123
GNU Parted 3.1
Using /dev/md123
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) parted
第二步mklabel gpt 格式
(parted) mklabel gpt
Warning: The existing disk label on /dev/md123 will be destroyed and all data on this disk will be lost. Do you want to continue?
Yes/No? Yes
(parted) p
Model: Linux Software RAID Array (md)
Disk /dev/md123: 3801GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:
Number Start End Size File system Name Flags
第三步，分區大小
(parted) mkpart primary 0% 100%
(parted) p
Model: Linux Software RAID Array (md)
Disk /dev/md123: 3801GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:
Number Start End Size File system Name Flags
1 1049kB 3801GB 3801GB primary
(parted) quit
Information: You may need to update /etc/fstab.
[root@localhost ~]# blkid
/dev/sda: TYPE="isw_raid_member"
/dev/sdf: TYPE="isw_raid_member"
/dev/sdh: TYPE="isw_raid_member"
/dev/sdd: TYPE="isw_raid_member"
/dev/sdb: TYPE="isw_raid_member"
/dev/sde: TYPE="isw_raid_member"
/dev/sdc: TYPE="isw_raid_member"
/dev/sr0: UUID="2015-12-09-23-14-10-00" LABEL="CentOS 7 x86_64" TYPE="iso9660" PTTYPE="dos"
/dev/sdg: TYPE="isw_raid_member"
/dev/md126: PTTYPE="dos"
/dev/md126p1: UUID="3fb56b78-6edc-4c97-815d-ce8b3beb32fd" TYPE="swap"
/dev/md126p2: UUID="92cc9ba5-69a5-4e14-bc98-aaaf406148bc" TYPE="xfs"
/dev/md123: PTTYPE="gpt"
/dev/md123p1: UUID="3vJEGY-xD0u-oOdB-2AMD-uYZi-EJcu-7eAgg0" TYPE="LVM2_member" PARTLABEL="primary" PARTUUID="dd206572-fc24-481e-a1e2-f8e6408c43d3"
/dev/md122: PTTYPE="gpt"
/dev/md122p1: UUID="b7879e71-b898-4926-a93c-5c43394ea69f" TYPE="ext4" PARTUUID="fde74149-63f1-4b31-80ba-a7a8ac160382"
/dev/mapper/docker-259:1-1610946489-pool: UUID="489f731f-6c9e-45a7-b2a3-0c81ba1c287a" TYPE="xfs"
isk /dev/md123: 3800.7 GB, 3800720998400 bytes, 7423283200 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: dos
Disk identifier: 0x00000000
Device Boot Start End Blocks Id System
/dev/md123p1 1 4294967295 2147483647+ ee GPT
格式化
[root@localhost ~]# mkfs.ext4 /dev/md123p1
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
231981056 inodes, 927909888 blocks
46395494 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=3076521984
28318 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968,
102400000, 214990848, 512000000, 550731776, 644972544
Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
[root@localhost ~]#