Many drives come with an option of setting jumpers to limit the size of the drive because of limitations of older computers. Today the limit for many slightly older computers is about 137GB because they do not support 48bit Logical Block Addressing (LBA). Today, a computer without 48bit LBA will only see a 200GB hard drive up until it hits that 137GB region and just thinks the drive ends there. But when older computers hit limits like this years ago, they probably would not see the drive at all. So the drives could make themselves look like a 2GB drive, or whatever else, using jumpers.
Although jumper setting vary from company to company and model to model, you will probably want to remove all jumpers and just put one back on to set the drive as Slave, Master, or Cable Select depending on what other drives are attached to the same cable. If this is the only drive on the cable, set it to master, although if this is a Western Digital drive and the only drive on the IDE cable, it may require no jumpers at all.
There should be some marking on the drive to indicate the jumper positions for each setting.
Yes, you will need to reformat the drive afterwords, so get anything you need to keep off the drive before you do this.
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Edit:
This might help with the jumper settings, I belive it is the model you have.
http://www.maxtor.com/_files/maxtor/en_us/documentation/quick_specs/diamondmax_6800_ultra_ata_quick_specs.pdf
You probably just have to remove the jumper labled as J46 in the PDF above. Then format the drive.
If you need a tool to reformat the drive, download Maxtor's PowerMax. You will need a floppy disk for it.
Maxtor PowerMax
Although, the Windows installs should be able to do this as well.
Have fun, reinstalling windows is always a blast.
