SCSI drives are both forward and backward compatible and those brands are known to work well with the Amiga hardware (I prefer the Atlas); since both drives are giving you trouble, the common denominator seems to be the controller or computer. Would you mind listing your setup (KS, WB, and hardware) and when you last had the Trumpcard working?
In general, the 50-to-80 pin converters can be left without any jumpers unless you need your terminators powered; I suggest using both end, powered and active termination on a bus/cable that has hard drive that exceed SCSI-1 specifications, and your's do.
Also, are you entering the correct device name in HDToolBox? It should be something like, trumpcard.device as scsi.device is reserved for Amiga controllers.
"So many questions, so little time."