添加磁盘空间

新增一块磁盘，将此磁盘加入 /home 空间下：

 

[root@test1 home]# fdisk /dev/sdd
Command (m for help): n
Partition type:
   p   primary (0 primary, 0 extended, 4 free)
   e   extended
Select (default p):
Using default response p
Partition number (1-4, default 1):
First sector (2048-419430399, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-419430399, default 419430399):
Using default value 419430399
Partition 1 of type Linux and of size 200 GiB is set

*.新建的分区似乎重启才会生效

[root@test1 home]# pvcreate /dev/sdd
Device /dev/sdd excluded by a filter.

[root@test1 ~]# vgextend centos /dev/sdd1
Volume group "centos" successfully extended

[root@test1 ~]# lvresize -L +200g /dev/centos/home
Size of logical volume centos/home changed from 1.04 TiB (273918 extents) to <1.05 TiB (274172 extents).
Logical volume centos/home successfully resized

此时 df -h 
/dev/mapper/centos-home  870G  401G  469G  47% /home


重新识别 /dev/centos/home 的大小
[root@test1 ~]# xfs_growfs /dev/centos/home
meta-data=/dev/mapper/centos-home isize=512    agcount=4, agsize=57015808 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=0 spinodes=0
data     =                       bsize=4096   blocks=228063232, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal               bsize=4096   blocks=111359, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
data blocks changed from 228063232 to 280752128