This is a lot easier said than done, unfortunately. I'm assuming that the reason you want to do this is the master was originally a relatively small capacity hard drive, and the slave is a much larger drive, and you want to swap the two over because the "system" drive, the master, is running out of space. From a physical point of view it's very easy. There's a small plastic jumper on the back of both drives, by the side of the flat ribbon cable. It will be marked MA (Master) SL (Slave) and CS (Cable Select) - swapping over the jumpers on both drives will alter the order. Unfortunately, it will also make the system unbootable, since the master hard drive is always searched for the boot record, and swapping the physical configuration won't change the fact that one drive has a boot sector that allows you to start (the one that is currently master) and one doesn't. Swapping them over would lead to the new master hard drive not having that boot record, and either the machine would search other drives, in which case it would boot but still treat the drives in the same order, or it would simply refuse to boot at all. The solution to THAT problem is a little more complex. You will need to move all the data off the Slave drive, possibly to a CD or DVD, or even a removable USB hard drive. Then you would need to find a good migration, for example Acronis Easy Migrate ( http://www.acronis.com/homecomputing/products/migrateeasy/ ) which would copy the contents of the master drive to the slave drive in its entirety. This would make sure that all your settings and drivers would be retained, but would require the slave drive to be blank. Alternatively you could simply make a new installation on the slave drive once you've switched the jumpers over, but if you try this option MAKE SURE you have all the driver disks to your hardware BEFORE you start. Doing this might mean that it takes a while to get the hardware working if you have to search for drivers, wheras migrating the data would keep your data and your drivers intact. If you have any questions, ask them here BEFORE you start. What you're contemplating doing may leave you with an unbootable system so be sure you haven't any questions before you start.

Just look at the back of your hard drive and swith the little jumpers accordingly to what the hard drives specifies on the back. But i must ask. Why do you want to do this, are you getting another hard drive?

how do i switch my c: and d:

On my win xp pro 32 system, I have a physical HD 0 with drives shown as C: (primary); D: and F: There is also an identical physical drive 1 which is also shown as "Basic and Online" in Windows Disk Management but drive 1 is unallocated. Because drive 0 is showing signs of failing (bad sectors, cannot do defrag), I would like to use a cloning program to clone drive 0 to drive 1 and then make 1 the master and stop using drive 0. How would I do that using Disk Management and the cloning software (what do you recommend)? Do I also need to make some jumper changes?

Why is it called master and slave? ive always wondered that. its kinda mean lol. :(