Basically I have a mount point /mnt/usb which was meant for my USB HDD Dock. However, noticed during my last reboot that /mnt/usb was auto-mounted from /dev/sdb3 which is a root mount point from a SATA HDD. Anyone knows how did /dev/sdb3 got "auto-mounted" onto /mnt/usb when it's not specified in fstab nor udev? Where else can I look to rectify?