target is busy. (In some cases useful info about processes that use the device is found by lsof(8) or fuser(1))

# umount /dev/vg1/lvMysql
umount: /mnt/mysql: target is busy.
(In some cases useful info about processes that use
the device is found by lsof(8) or fuser(1))

# fuser -k /mnt/mysql/

参考:http://blog.itechol.com/space-33-do-blog-id-6188.html