Report Build A SCSI2SD V4.2 in Hacks & Development Posted Sunday at 02:16 PM When I had trouble doing this, I had to get into scsi2sd-util and hack in additional debugging to get more than the a terse "things didn't work" message. I don't have the modified versions I made, unfortunately. To roll your own, in scsi2sd-util.cc there's a (myHID->scsiSelfTest() ? "Passed" : "FAIL") statement. I believe the value returned there is the same integer returned in the firmware's self-test, defined in scsiPhy.c, where certain bits are set if particular tests failed. You could change the line so instead of doing a pass/fail conditional it just writes the results of scsiSelfTest() to the console so you can check which bits are set. In all cases with me the problems I had were with with bridged / dry pins on the main SoC. The 0.5mm spacing is tight and it's hard to see if there is a problem there, even using a loupe.