The computer starting demonstrates disk error

The computer starting demonstrates disk error.But I insert the data line, was good.How long like this.Did not know that is hard disk’s question or the line question.Other any parts have the question.I am the serial port hard disk.
Should be the wiring is bad Is very greatly possibly the line question, the first time period I have also met, came back with others memorandum receipt data line to try to know.The possible data line that hard disk receptacle not to have met or the hard disk connection oxidation Has the possibility is the contact is not good, inserts several times, best trades the strip line to be best.