As an added thought.... If you want to use the HD
disks, the best thing to do is use a bulk eraser (like used for reel to reel
tapes, cassett tapes or video tapes) and erase the disk. Then format it in the
disklavier. If it has been "used" also read "formatted" as a HDD you can/may
have problems in a 720kb drive.
Regards
Frank Evans