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

　　使用 parted 建立大小超过2T的分区

　　1，parted /dev/sdb 　　可以输入p打印磁盘信息，查看分区的情况，找到起始和结束位置。

　　2，mklabel gpt 　　设置分区类型为gpt

　　3，mkpart primary 0% 100% 　　primary指分区类型为主分区，0是分区开始位置，100%是分区结束位置。相同的命令为：mkpart primary 0-1 或者是：mkpart  primary 0  XXXXXX结束的空间

　　4，print 　　打印当前分区,查看分区设置是否正确 　　5，quit 　　完成后用quit命令退出。

 　　6，mkfs.ext3  /dev/sdb1

　　格式化磁盘。如果支持EXT4可选择格式化为EXT4，格式化成ext3的时候又出现问题。Ext3默认的block size的大小为4k,最大只能支持8T的空间。格式化时指定block size的大小为8K这样最大可以支持16T的空间。相应命令：mkfs.ext3 -b 8192 /dev/sdb2

第一步，parted [root@localhost ~]# parted /dev/md123GNU Parted 3.1Using /dev/md123Welcome 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: 3801GBSector size (logical/physical): 512B/512BPartition Table: gptDisk Flags:

Number  Start  End  Size  File system  Name  Flags

第三步，分区大小(parted) mkpart primary 0% 100%      

                                     (parted) p                                                                Model: Linux Software RAID Array (md)Disk /dev/md123: 3801GBSector size (logical/physical): 512B/512BPartition Table: gptDisk 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 sectorsUnits = sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk label type: dosDisk 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: LinuxBlock size=4096 (log=2)Fragment size=4096 (log=2)Stride=0 blocks, Stripe width=0 blocks231981056 inodes, 927909888 blocks46395494 blocks (5.00%) reserved for the super userFirst data block=0Maximum filesystem blocks=307652198428318 block groups32768 blocks per group, 32768 fragments per group8192 inodes per groupSuperblock 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): doneWriting superblocks and filesystem accounting information: done       

[root@localhost ~]#