hi i have intel 2.8gz(hyperthreading) processor and intel 915 gav orignal motherboard,512 m.b ram,80 gb sata segate hdd.i have an intex cabinet and a colorsit power supply(model no 300u-fne) which has a rating of 400w switching power. i have dvd rom(sony) and a cd writer(l.g) i recently got a dvd writer(sony) from a friend now the problem is that when i connected the dvd writer in place of my cd writer and started p.c then it only showed dvd rom drive then i shutdown the p.c press the power cable and data cable of writer and start the p.c now i get only dvd writer. i checked the bios, it only showed dvd rom drive the 1st time and only the writer the 2nd time.both the times when i press the eject button of either drive then the tray would come out but it was not shown in the my computer so i guess that both drives are getting power. i also went to ctrl panel>administrative tools>computer management>disk management here also it showed only 1 drive both times 1st the rom and then the writer. is my data cable faulty. do i need to do some master/slave thing.i took out the jumper from the writer,should i put it back.should i make it master or slave.and also pls tell how to make it master or slave.