I have a TrueCrypt partition. When I insert it in Mac OS X, it always prompt me to initialize the hard disk. Is there a way to prevent Mac OS X from detecting uninitialize hard disk?

[UPDATE]

By the way, as Truecrypt suggested while I'm in Windows, I must make partitions so the OS won't detect the hard drive as uninitialized. Windows respected that the drive already have contents by the mere fact that it has partitions, while Mac OS X thinks that it is still uninitialized. I think Mac OS X is trying to be smart by detecting if each partition has a valid filesystem id/marker.