PIO Mode from The Tech ARP BIOS Guide

PIO Mode from The Tech ARP BIOS Guide

PIO Mode

Common Options : Auto, 0, 1, 2, 3, 4

 

Quick Review

This BIOS feature allows you to set the PIO (Programmed Input / Output) mode for the IDE drive.

Setting this BIOS feature to Auto lets the BIOS auto-detect the IDE drive’s maximum supported PIO transfer mode at boot-up.

Setting this BIOS feature to 0 forces the BIOS to use PIO Mode 0 for the IDE drive.

Setting this BIOS feature to 1 forces the BIOS to use PIO Mode 1 for the IDE drive.

Setting this BIOS feature to forces the BIOS to use PIO Mode 2 for the IDE drive.

Setting this BIOS feature to 3 forces the BIOS to use PIO Mode 3 for the IDE drive.

Setting this BIOS feature to forces the BIOS to use PIO Mode 4 for the IDE drive.

Normally, you should leave it as Auto and let the BIOS auto-detect the IDE drive’s PIO transfer mode. You should only set it manually for the following reasons :-

  • if the BIOS cannot detect the correct PIO transfer mode.
  • if you want to try forcing the IDE device to use a faster PIO transfer mode than it was designed for.
  • if you want to force the IDE device to use a slower PIO transfer mode if it cannot work properly with the current PIO mode (i.e. when the PCI bus is overclocked)

Please note that forcing an IDE device to use a PIO transfer rate that is faster than what it is rated for can potentially cause data corruption.

 

Details

This BIOS feature allows you to set the PIO (Programmed Input / Output) mode for the IDE drive. Here is a table of the different PIO transfer rates and their corresponding maximum throughputs.

PIO Data Transfer Mode

Maximum Throughput

PIO Mode 0

3.3 MB/s

PIO Mode 1

5.2 MB/s

PIO Mode 2

8.3 MB/s

PIO Mode 3

11.1 MB/s

PIO Mode 4

16.6 MB/s

Setting this BIOS feature to Auto lets the BIOS auto-detect the IDE drive’s maximum supported PIO transfer mode at boot-up.

Setting this BIOS feature to 0 forces the BIOS to use PIO Mode 0 for the IDE drive.

Setting this BIOS feature to 1 forces the BIOS to use PIO Mode 1 for the IDE drive.

Setting this BIOS feature to forces the BIOS to use PIO Mode 2 for the IDE drive.

Setting this BIOS feature to 3 forces the BIOS to use PIO Mode 3 for the IDE drive.

Setting this BIOS feature to forces the BIOS to use PIO Mode 4 for the IDE drive.

Normally, you should leave it as Auto and let the BIOS auto-detect the IDE drive’s PIO transfer mode. You should only set it manually for the following reasons :-

  • if the BIOS cannot detect the correct PIO transfer mode.
  • if you want to try forcing the IDE device to use a faster PIO transfer mode than it was designed for.
  • if you want to force the IDE device to use a slower PIO transfer mode if it cannot work properly with the current PIO mode (i.e. when the PCI bus is overclocked)

Please note that forcing an IDE device to use a PIO transfer rate that is faster than what it is rated for can potentially cause data corruption.

Go Back To > The Tech ARP BIOS Guide | Home

 

Support Tech ARP!

If you like our work, you can help support our work by visiting our sponsors, participating in the Tech ARP Forums, or even donating to our fund. Any help you can render is greatly appreciated!


Comments

comments

About The Author

Related posts

Leave a Reply

%d bloggers like this: