超过2T，磁盘分区

MBR：MBR分区表(即主引导记录)大家都很熟悉。所支持的最大卷：2T，而且对分区有限制：最多4个主分区或3个主分区加一个扩展分区

GPT： GPT（即GUID分区表）。是源自EFI标准的一种较新的磁盘分区表结构的标准，是未来磁盘分区的主要形式。与MBR分区方式相比，具有如下优点。突破MBR 4个主分区限制，每个磁盘最多支持128个分区。支持大于2T的分区，最大卷可达18EB。

-.使用parted

没有parted命令

#yum -y install parted

1、将、dev/sdb 分区

parted /dev/sdb

2、设置分区的类型

(parted) mklabel gpt

3、打印分区信息

(parted) p

4、分区

mkpart primary 0KB .0TB

输出：
rning: You requested a partition from 0.00B to 40.0TB.
The closest location we can manage is 17.4kB to 40.0TB.
Is this still acceptable to you?
Yes/No? yes （输入yes）
Warning: The resulting partition is not properly aligned for best performance.
Ignore/Cancel? i （输入i）

5、查看分区分区信息和退出

(parted) p
 Model: HP LOGICAL VOLUME (scsi)
 Disk /dev/sdb: 40.0TB
 Sector size (logical/physical): 512B/4096B
 Partition Table: gpt
 Number  Start   End     Size    File system  Name     Flags
   1      17.4kB  40.0TB  40.0TB               primary

(parted) quit

二、xfs格式化大分区

 #yum install kmod-xfs xfsprogs
 #modprobe xfs       //载入xfs文件系统模块
 #lsmod |grep xfs    //查看是否载入了xfs模块

用xfs格式化并挂载

 #mkfs.xfs -f /dev/sdb1
 #mount /dev/sdb1 /data

设置系统启动自动挂载分区

#cat  /etc/fstab
     /dev/sdb1  /data xfs  defaults  0  0

查看所有磁盘的状态

# parted -l

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  21.5GB  21.5GB               gzh
 
(parted)  rm 1

把分区误删除了恢复

(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
 2      17.4kB  3000MB  3000MB  xfs          gzh
 1      10.0GB  21.5GB  11.5GB  xfs          gg
 
(parted) rm 2
(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      10.0GB  21.5GB  11.5GB  xfs          gg
 
(parted) rescue
Start? 0KB
End? 3GB
Information: A xfs primary partition was found at 17.4kB -> 3000MB.  Do you want to add it to the partition table?
Yes/No/Cancel? yes                                                        
 
(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
 2      17.4kB  3000MB  3000MB  xfs
 1      10.0GB  21.5GB  11.5GB  xfs          gg

rm