|If the motherboard chipset drivers are not installed the drive can't run in a DMA mode. That will make it very slow. Also, if both are connected to the same cable that will definitely make it slower even if the controller drivers are installed. |
You need to be using a 40 80 wire/ 40 pin IDE cable in order to get speeds faster than 33 MBPS. The cable will have a blue MB connector with a grey center connector and a black end connector.
You can check to see if the drives are runnning in one of the DMA modes by checking the advanced settings for the IDE controllers in Device Manager.
Of course, it is also possible that the drive is damaged. Run a hard drive fitness test from the manufacturers site.