how to add a slave drive on a emachines?

Answer 1

Make sure you have room for an extra hard drive, here's one way to do this:
Restart your computer and go into the BIOS menu.
Go to the "Standard CMOS Settings."
In this menu, you will find four settings labeled as follows: PRIMARY MASTER:, AUTO/PRIMARY SLAVE:, SECONDARY MASTER:, SECONDARY SLAVE:. Change all fields to auto detection.
Reboot your computer
On the first or second screen, you will see something like the screen above and it will say detecting (drive(prim/sec)) : (name of the drive if present). If any of them say none, remember which drive it is. If all of them have a drive name, all your bays are filled and you can't add a new hard drive without removing a disk drive or hard drive.
Get the actual hard drive. Go to your local computer store or buy online from Newegg or another retailer. Make sure that it is an IDE drive. If you plan on replacing your existing hard drive, be sure to get one with enough space to compensate for what you're losing.
Shut down your computer.
Unplug all of the cords from the back of your computer and pull the computer out from the desk.
Remove the case screws. If you have a Dell, you only need to push down on the release latch on the back. If you're having difficulty, it's a good idea to consult your manual on how your particular case is removed. Put the screws in a safe place so you don't lose them. Remove the side panel and place it out of the way.
FIG. 2:The thumb screw.
FIG. 3:The ribbon cable connection.Find the area where all the flat ribbon cables connect to the main board.(fig. 3) Find the cable that corresponds to the free drive that was detected in step 1-6, either primary or secondary.
Set the jumpers so the drive knows whether to act as a master or slave. The jumpers are the set of pins on the back of the hard drive. They'll have a couple of rubber blocks covering some pins. Find the diagram or instructions for your new drive on to set the jumper for the master/slave. (fig. 4)
FIG. 4:The jumper in the slave position. If it says to remove a jumper completely, put it on the single pin so you don't lose it.Find the empty bay in your computer case. Using the screws that came with the drive, mount the drive. (fig. 5)
FIG. 5:The hard drive mounted in it's holster.Connect the cable that you found in step 6 to the hard drive. If it won't go in, make sure that the safety bump is aligned with the hole.(fig. 6)
FIG. 6:The ribbon cable installed.Connect a power cable, (a smaller connector with red, yellow, and black wires.)(fig. 7)
FIG. 7:The power cable is installed.Put the side panel back on the computer and put the screws back in.
Plug all of the cables back into the rear of the computer, and connect them to their power sources if you unplugged them.
Boot up the computer. Go into your BIOS at startup (most likely by pressing F10 or DEL as the computer starts). Check the BIOS auto detect to ensure the second drive is detected. On the screen that shows that primary master/slave, secondary master/slave you should see the name of your new hard drive.



Tips :SATA hard drives work pretty much the same. Read the instructions in the package to install these. Be careful, though. Only SATA-enabled motherboards will accept these drives.
Consider buying (or making, see Build an External Hard Drive) an external hard drive if you have USB support on your computer. They plug directly into the USB port and work like any other hard drive, except you have to take extra steps if you would like to boot from it.
If there is a BIOS problem indicated, make sure the original hard drive (HD) is set to "Master"; or if the original HD is set to CS (cable select), make sure it is at the end of the IDE cable (make sure you have a cable select ribbon cable. They will be labeled on each connector).
don't use these instructions on a mac

Answer 2

Follow this, step by step:
http://compreviews.about.com/od/tutorials/ss/DIYSecHD.htm