Stop iTunes from creating a local library on start up I'd like to store my iTunes Music Library on a USB drive connected to my time capsule to use it with my Macbook Air. The problem is, when the network drive with the library is not mounted or unreachable by the computer then iTunes creates a new local Library on start up. 

Can I stop iTunes from doing that or even better notify me if the drive is not mounted? I really would like to avoid creating a local Library. Otherwise files end up on multiple location and it seems hard to consolidate this.
I've had this happen as well. 

The best solution is not to let iTunes open unless the drive is connected, but I see how that isn't always possible when on the road. 

I found that (in OS 10.6 and iTunes 9, at least), if you make the MUSIC Folder in your home directory (~/Music/) read-only, it will not be able to automatically create an iTunes directory in the default location, and thereby it will prompt you to find the iTunes library. 

As an alternative, you can hold down the Command key when opening iTunes, which will prompt you to connect to a Library. 

Alternative 2: If you make a Symbolic link to the iTunes Library in your music folder, it will attempt to mount the drive in order to find it.