Master/Slave configuration I am assuming you have IDE hard drive and not SATA. SATA is a small cable IDE is a wide 40 wire flat cable. You must install the jumper on both drives as master and slave. On the old WD HDD master has jumpers between 5 and 6 and slave jumper between 3 and 4. Default is jumper between 1 and 2 which is cable select which you use for a single drive.
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Master/Slave configuration I am assuming you have IDE hard drive and not SATA. SATA is a small cable IDE is a wide 40 wire flat cable. You must install the jumper on both drives as master and slave. On the old WD HDD master has jumpers between 5 and 6 and slave jumper between 3 and 4. Default is jumper between 1 and 2 which is cable select which you use for a single drive.