The Linux Ultra-DMA Mini-Howto: Using your UDMA hard drive with an EIDE interface 3. Using your UDMA hard drive with an EIDE interfaceThis is easy to do. Since all UDMA drives are fully EIDE backward-compatible, just plunk your drive on your EIDE interface like it was any old hard drive and Linux should have no problems detecting or using it. However, you will of course be limited to the slower speed of EIDE. s