echo "- - -" > /sys/class/scsi_host/host0/scan
echo "- - -" > /sys/class/scsi_host/host1/scan
echo "- - -" > /sys/class/scsi_host/host2/scan
echo "- - -" > /sys/class/scsi_host/host3/scan
pvcreate /dev/sdb
vgextend centos /dev/sdb
lvextend -L +300G /dev/mapper/centos-root
xfs_growfs /dev/mapper/centos-root
查看lv的名称(如centos还是cl)命令是:dh -Th
pvcreate /dev/sdb
vgextend cl /dev/sdb
lvextend -L +300G /dev/mapper/cl-root 或者 lvextend -l +100%FREE /dev/mapper/cl-root
xfs_growfs /dev/mapper/cl-root