fdisk 对硬盘进行扩容( 待续...)
https://www.cnblogs.com/wangzhigang/p/5530741.html
#e2fsck -f /dev/mapper/ycgsstore_sdb-wmy
#resize2fs /dev/mapper/ycgsstore_sdb-wmy
https://www.linuxquestions.org/questions/linux-general-1/df-showing-incorrect-used-space-after-lvextend-758945/
原文：https://www.cnblogs.com/jasonsou/p/10591410.html