linux无损调整分区大小

1
## 释放 /dev/centos/home 分区 300G 的空间
2
## 命令设置 /dev/centos/home 分区 200G空间
3
$ lvreduce -L 200G /dev/centos/home
4
WARNING: Reducing active logical volume to 200.00 GiB.
5
 THIS MAY DESTROY YOUR DATA (filesystem etc.)
6
Do you really want to reduce centos/home? [y/n]: y
7
 Size of logical volume centos/home changed from 475.70 GiB (121778 extents) to 200.00 GiB (51200 extents).
8
 Logical volume centos/home successfully resized.

1
$ lvextend -l +100%FREE /dev/centos/root
2
Size of logical volume centos/root changed from 50.06 GiB (12816 extents) to 325.76 GiB (83394 extents).
3
Logical volume centos/root successfully resized.

1
$ xfs_growfs /dev/mapper/centos-root
2
meta-data=/dev/mapper/centos-root isize=256    agcount=4, agsize=3276800 blks
3
         =                       sectsz=512   attr=2, projid32bit=1
4
         =                       crc=0        finobt=0 spinodes=0
5
data     =                       bsize=4096   blocks=13107200, imaxpct=25
6
         =                       sunit=0      swidth=0 blks
7
naming   =version 2              bsize=4096   ascii-ci=0 ftype=0
8
log      =internal               bsize=4096   blocks=6400, version=2
9
         =                       sectsz=512   sunit=0 blks, lazy-count=1
10
realtime =none                   extsz=4096   blocks=0, rtextents=0
11
data blocks changed from 13107200 to 85395456