IDE and SATA do not change the data stored on the disk, the only difference between an IDE disk and a SATA disk is the connection between it and the motherboard, the data is stored on the disk in the exact same way for both.
The problem will be that the operating system has drivers installed so it knows how to talk to the motherboard, when you move it to a different motherboard it tries to use the drivers for the old board and it wont work.