lvm在线扩容方法

转载自 http://www.voidcn.com/article/p-uxhrkuzs-bsd.html

1. 创建pv
pvcreate /dev/sda#新增硬盘

即:pvcreate /dev/sda

2. 把创建的新pv加入vg
vgextend 卷组名 /dev/sda

即:vgextend centos /dev/sda

3. 扩容逻辑卷并制作xfs文件系统
vextend -r -l +100%FREE /dev/卷组名/逻辑卷名

即:vextend -r -l +100%FREE /dev/centos/centos-home

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