Lets go through the settings. Of course, the names, etc. do vary depending on the BIOS version you have. IDE HDD Block Mode Enabled recommended. This enables multi-sector transfers. This function allows IDE drive to transfer several sectors at a time.
Several modes are possible.
Mode 0 means one sector at a time. Mode 1 is no interrupts. Mode 2 means sectors are transferred in a single burst. Mode 3 means 32-bit instructions at up to 11.1 MB per sec. Standard for most drives today is PIO Mode 4.