Yeah, I edited the /mnt/hda6 -> /dev/hda6 although I must say I'm not sure if it was wise.
The point being that the device is mounted on all occasions, but the mountpoint is changed temporarily from /mnt/hda6 to /boot and then back to /mnt/hda6.
You'll notice that I just changed it back to what the original author meant as he's talking about a partition, not a device. It's debatable which is the correct syntax here, so I'll just go with the authors version here. You can of course change it again