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 2 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 4 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 |
[adrotate group=”2″]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 2 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 4 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.
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