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IDE Prefetch Mode

Common Options : Enabled, Disabled

Quick Review

This BIOS feature controls the IDE controller's prefetch buffer. Whenever the processor requests for data from a drive, the IDE controller can prefetch the data following it. If the processor requests for the subsequent blocks of data, it can be quickly satisfied by the prefetched data.

When enabled, the IDE controller prefetches data from the IDE drive, in the assumption that the processor will request for it next. This improves data throughput, especially for sequential reads.

When disabled, the IDE controller will not prefetch any data from the IDE drive. Each data read must be preceded by a data request from the processor.

If you are running a desktop, it is recommended that you enable this feature for better data throughput from your IDE drives.

Server administrators should evaluate the effect of this BIOS feature on the performance of their server, before disabling or enabling it.

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