首先在线识别硬盘:

echo "- - -" > /sys/class/scsi_host/host0/scan

echo "- - -" > /sys/class/scsi_host/host1/scan

echo "- - -" > /sys/class/scsi_host/host2/scan

查看硬盘信息

fdisk -l

创建硬盘文件

fdisk /dev/sdc 

查看lv信息

lvdisplay

创建pv

pvcreate /dev/sdc1 

扩容

vgextend centos /dev/sdc1 

lvextend -L +99G /dev/centos/root 

xfs_growfs /dev/centos/root