Source : Free On-Line Dictionary of Computing

Dynamic Drive Overlay
     
         (DDO) Software to allow a {system BIOS}
        that does not support {Logical Block Addressing} to access
        drives larger than 528 MB.
     
        The alternatives are to update the system BIOS or install an
        {EIDE controller} card with a suitable on-board BIOS.
     
        {Seagate
        (http://www.seagate.com/support/disc/drivers/discfile.shtml)}.
     
        (2001-03-18)