Acer AcerPower Sx Acer Power SX/SXb/SC Service Guide - Page 40

Parameter Hard Disk Block Mode Hard Disk 32-bit Access Advanced PIO Mode DMA Transfer Mode Description This function enhances disk performance depending on the hard disk in use. If you set this parameter to Auto, the BIOS utility automatically detects if the installed hard disk drive supports the Block Mode function. If supported, it allows data transfer in blocks (multiple sectors) at a rate of 256 bytes per cycle. Enabling this parameter improves system performance by allowing the use of the 32-bit hard disk access. This enhanced IDE feature works only under DOS, Windows 3.x, Windows 95/98, Windows NT, and Novell NetWare. When set to Auto, the BIOS utility automatically detects if the installed hard disk supports the function, it allows for faster data recovery and read/ write timing that reduces hard disk activity time. This results in better hard disk performance. The Ultra DMA and Multi-DMA modes enhance hard disk performance by increasing the transfer rate. However, besides enabling these features in the BIOS Setup, both the Ultra DMA and Multi-DMA modes require the DMA driver to be loaded. Options Auto or Disabled Enabled or Disabled Auto, Mode 0, 1, 2, 3 or 4 Auto Multiword Mode 0, 1, 2 Ultra Mode 0, 1, 2, 3, 4 Disabled 32 Chapter 2