Acer Power SV Aspire T100/SV Service Guide - Page 39

Integrated Peripherals The following table describes each Integrated Peripherals parameters. Settings in boldface are the default and suggested values.  Parameter IDE HDD Block Mode   On Chip Primary PCI IDE IDE Primary Master PIO IDE Primary Slave PIO IDE Secondary Master PIO IDE Secondary Slave PIO Description  Options Block mode is also called block transfer, multiple commpands or multiple sector read/write. If your IDE hard drive supports block mode ( most new drives do), select "Enabled" for automatic detection of the optimal number of block read/write per sector the drive can support. Enabled Disabled   The integrated peripheral controller contains an IDE interface with support two IDE channels, select Enabled to activate each channel separately Setting these items to "Auto" activates the HDD speed auto-detect function. The PIO mode specifies the data transfer rate of the HDD. For example, mode 0 data transfer rate is 3.3MB/s, mode 1 is 5.2 MB/s, mode 2 is 8.3MB/s, mode 3 is 11.1 MB/s and mode 4 is 16.6MB/s. If your hard disk performance becomes unstable, you may manually try the slower mode. Enabled Disabled Auto, mode 1, mode 2, mode 3 and mode 4  32 Chapter 2