linux——centOS7磁盘扩容

1.vmware 虚拟机设置磁盘扩容

2.centos挂载点配置

1.输入”df -h”，查看文件系统。

2.fdisk -l , 查看硬盘分区情况，可以发现硬盘空间确实已经扩展了到了30G。

3．创建分区3
现在对硬盘/dev/sda进行硬盘操作，执行命令fdisk /dev/sda

4．重启操作系统 reboot
5．格式化新分区为ext3

10．lvdisplay
11.vg加入相应的lv
Lv的名用 df –h和lvdisplay查看


vgextend centos /dev/sda3

12.查看可扩展空间大小

13.扩容磁盘空间

[root@backup binlog]# lvextend -L +4G  /dev/mapper/centos-root   /dev/sda3

Size of logical volume centos/root changed from 2.66 TiB (697542 extents) to 2.66 TiB (698566 extents).
Logical volume home successfully resized.

执行resize2fs报错:

[root@backup binlog]# resize2fs /dev/mapper/centos-root

resize2fs 1.42.9 (28-Dec-2013)
resize2fs: Bad magic number in super-block 当尝试打开 /dev/mapper/centos-root 时
找不到有效的文件系统超级块.

确认文件系统是xfs:
[root@backup binlog]# cat /etc/fstab | grep centos-root
/dev/mapper/centos-home /home xfs defaults 0 0

xfs用以下命令来扩磁盘空间:

[root@backup binlog]# xfs_growfs /dev/mapper/centos-root

meta-data=/dev/mapper/centos-home isize=256 agcount=6, agsize=118277632 blks
= sectsz=4096 attr=2, projid32bit=1
= crc=0 finobt=0
data = bsize=4096 blocks=709040128, imaxpct=5
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=0
log =internal bsize=4096 blocks=231011, version=2
= sectsz=4096 sunit=1 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 709040128 to 715331584

OK了！