Disklavier

The smaller PATA drives listed would still require an adapter since the laptop PATA drives are powered via the extra pins on the data cable which the Disklavier uses a separate power cable and standard data cable.

Also, most PATA drives are slower read & write and could be slower than the Disklavier's IDE interface which is the current bottleneck when using a faster SATA3 SSD & proper SATA to PATA adapter. 

Try to find a fast 3.5" SSD drive or an adapter to convert these drives to 3.5" standards.

Best wishes! 

-Ken Ruda