IDE DMA Transfer Access
Common Options : Enabled, Disabled
Quick Review
This BIOS feature allows you to enable or disable DMA (Direct Memory Access) support for all IDE devices.
If you disable this BIOS feature, the BIOS will disable DMA transfers for all IDE drives. They will revert to PIO mode transfers.
If you enable this BIOS feature, the BIOS will enable DMA transfers for all IDE drives. The proper DMA mode will be detected at boot-up. If the drive does not support DMA transfers, then it will use PIO mode instead.
It is highly recommended that you leave this BIOS feature at the default setting of Enabled. If the drive supports DMA transfers, the proper DMA transfer mode will be enabled for that drive, allowing it to burst data at anywhere from 33MB/s to 133MB/s (depending on the transfer mode supported).
You should only disable it for troubleshooting purposes. For example, certain IDE devices may not run properly using DMA transfers when the PCI bus is overclocked. Disabling DMA support will force the drive to use the slower PIO transfer mode. This may allow the drive to work properly with the higher PCI bus speed.
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