Everything I've found, as far as SATA cable testers appear to only be for testing the power cables, not the data cables. I know that cables are cheap, thus not making testing an absolute necessity, but I hate buying new cables when I'm not certain it's necessary. Is there an inexpensive tester available for this purpose? If not, is there a practical means to test them otherwise? I can't see any way to use a DVR, because the holes and pins on the cables are too small for the DVR's probes.