My Book Studio

Hello I have a problem with my Book Studio 1 TB external drive on Mac running 10.6.8 I have to run the disk utility every day to repair the Volume bitmap and I can’t figure out what is causing the problem. Can anyone help please?

As a recommendation, 

Test the unit with the disk utilities to see if is something with the drive it self.

See if the following link helps:

http://wdc.custhelp.com/app/answers/detail/a_id/866/session/L3RpbWUvMTQxMTU5MzMwOC9zaWQvcUE4b1JkM20%3D