Hello, I installed a 20 gig Western Digital WD200EB drive <http://www.wdc.com/en/products/products.asp?DriveID=13> in a G4MDD in the front bay. I formatted the disk and the volume mounts. I can read/write. But soon I found it is behaving erratically. Sometimes when writing a large chunk of data to it it seemed get stuck, the files on the disk seemed to disappear and sometimes the disk would disappear altogether. Restarting would not get the disk to mount. Shutting down and starting up again would bring the disk back with all the files on it. Now it is making irregular clicking noises. Now I'm wondering, is this a type of disk I can't use in this Mac or is the drive having problems of itself? Or is something else going on? Any advise appreciated. greetings, Steven -- steven at sifre.nl