1.     關閉虛擬機器，然後Vmware新增磁碟100G，然後開機。

2.     fdisk –l

[[email protected] ~]# fdisk -l

Disk /dev/sdb: 107.4 GB, 107374182400 bytes, 209715200 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 /dev/sda: 107.4 GB, 107374182400 bytes, 209715200 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: 0x000b5b8a

   Device Boot      Start         End      Blocks   Id  System

/dev/sda1   *        2048     2099199     1048576   83  Linux

/dev/sda2         2099200   209715199   103808000   8e  Linux LVM

Disk /dev/mapper/centos-root: 53.7 GB, 53687091200 bytes, 104857600 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 /dev/mapper/centos-swap: 2147 MB, 2147483648 bytes, 4194304 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 /dev/mapper/centos-home: 50.5 GB, 50457477120 bytes, 98549760 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

4，可以看到新增的磁碟為/dev/sdb: 107.4 GB

5. [[email protected] ~]# pvcreate /dev/sdb

  Physical volume "/dev/sdb" successfully created.

6．[[email protected] ~]# vgs

  VG     #PV #LV #SN Attr   VSize   VFree

  centos   1   3   0 wz--n- <99.00g 4.00m

7. [[email protected] ~]# vgextend  centos /dev/sdb

  Volume group "centos" successfully extended

8．[[email protected] ~]# lvextend -L +50G /dev/mapper/centos-root

  Size of logical volume centos/root changed from 50.00 GiB (12800 extents) to 100.00 GiB (25600 extents).

  Logical volume centos/root successfully resized.

9．[[email protected] ~]# xfs_growfs /dev/mapper/centos-root

meta-data=/dev/mapper/centos-root isize=512    agcount=4, agsize=3276800 blks

         =                       sectsz=512   attr=2, projid32bit=1

         =                       crc=1        finobt=0 spinodes=0

data     =                       bsize=4096   blocks=13107200, imaxpct=25

         =                       sunit=0      swidth=0 blks

naming   =version 2              bsize=4096   ascii-ci=0 ftype=1

log      =internal               bsize=4096   blocks=6400, version=2

         =                       sectsz=512   sunit=0 blks, lazy-count=1

realtime =none                   extsz=4096   blocks=0, rtextents=0

data blocks changed from 13107200 to 26214400

10 新增50G到 root成功！

[[email protected] ~]# lvs

  LV   VG     Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert

  home centos -wi-ao----  96.99g                                                    

  root centos -wi-ao---- 100.00g                                                   

  swap centos -wi-ao----   2.00g