If you want to add a second hard disk (slave drive) to your computer, you need to make sure that the jumpers on both the master (original) and slave (new drive) are set according to the manufacturer's instructions first so that your computer can detect the hard disks. Verify that your hardware is installed correctly, and then follow these steps:

1. Click Start, point to Run, and then type command (Note that the cmd command only works on Windows 2000-based computers).
2. At a command prompt, type fdisk, and then press ENTER. The following menu is displayed:

   1. Create DOS partition or Logical DOS Drive
   2. Set active partition
   3. Delete partition or Logical DOS Drive
   4. Display partition information
   5. Change current fixed disk drive

   Note that menu option 5 is available only if you have two physical hard disks on your computer.
3. Press 5, and then press ENTER. When you do this, the selection changes from the physical disk 1 (master) to the physical disk 2 (slave).
4. 1. Press 1 to select the Create DOS partition or Logical DOS Drive menu option, press ENTER,
   2. Press 2 to select the Create Extended DOS Partition menu option, and then press ENTER.

   When you make your slave drive an extended MS-DOS partition, your drive letters does not change. For example, if the first drive contains partition C and partition D, your slave drive becomes D unless you set the slave drive as an extended partition. If you skip this step and just create another primary MS-DOS partition for the slave drive, the new drive becomes drive D and what used to be drive D, changes to drive E.

5. You can partition the slave drive to make other logical drives just as you did with the original master drive. If your computer cannot detect the new drive, you may need to add the following line to your Config.sys file, where drive is a letter that is greater than the last drive letter on the computer (including the CD-ROM drive):

   lastdrive=drive

6. After you finish using the Fdisk tool, format the new partitions so that you can use them. After you press ESC to quit the Fdisk tool, restart your computer to start Windows.