NFS umount 提示 device is busy

[root@node11 SecStorage]# umount /mnt/SecStorage/

umount.nfs: /mnt/SecStorage: device is busy

umount.nfs: /mnt/SecStorage: device is busy

解决方法：

增加一个-l参数：umount -l /mnt/SecStorage

或者：

fuser -m -v /mnt/SecStorage

进程占用了，将其kill掉，再重新umount
kill -xxxx
umount /mnt/SecStorage