What Is This Tool?
This unit converter helps you translate data transfer values from IDE (UDMA mode 2) to IDE (DMA mode 1), two transfer modes used by legacy PATA/IDE devices. It assists in comparing relative speeds for configuring and troubleshooting older hardware.
How to Use This Tool?
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Enter the value in IDE (UDMA mode 2) you want to convert.
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Select the target unit as IDE (DMA mode 1).
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Click the convert button to see the equivalent transfer rate.
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Use the conversion results to interpret compatibility or performance scenarios.
Key Features
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Converts data transfer rates between IDE (UDMA mode 2) and IDE (DMA mode 1) units.
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Uses a fixed conversion rate based on theoretical maximum transfer speeds.
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Supports legacy IDE/ATA hardware configuration and performance analysis needs.
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Provides example conversions for quick reference.
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Browser-based and easy to use for computer hardware troubleshooting tasks.
Examples
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1 IDE (UDMA mode 2) equals approximately 2.48 IDE (DMA mode 1).
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2 IDE (UDMA mode 2) equals approximately 4.96 IDE (DMA mode 1).
Common Use Cases
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Configuring legacy PC BIOS or drive-controller settings for ATA/33 transfer performance.
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Interpreting benchmark results where drives report UDMA mode 2 capabilities.
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Troubleshooting driver or firmware issues on PATA systems due to transfer mode negotiation.
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Reducing CPU load by selecting appropriate DMA transfer modes.
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Legacy system compatibility testing and performance tuning for IDE devices.
Tips & Best Practices
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Use this conversion to compare transfer modes strictly within legacy PATA/IDE contexts.
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Verify hardware and driver compatibility when adjusting BIOS or system settings.
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Remember that real-world transfer rates might differ from theoretical values.
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Cross-reference conversion results with actual device performance and benchmarks.
Limitations
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Conversion is based on maximum theoretical transfer rates and may not reflect actual speeds.
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Applies only to legacy PATA/IDE interfaces, not to modern SATA or NVMe technologies.
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Hardware conditions, driver support, and system configurations impact real data transfer performance.
Frequently Asked Questions
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What is IDE (UDMA mode 2)?
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It is an Ultra DMA transfer mode for Parallel ATA interfaces, known as ATA/33, providing a maximum theoretical transfer rate of about 33.3 megabytes per second.
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What does IDE (DMA mode 1) mean?
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IDE (DMA mode 1) is a transfer mode allowing data moves between ATA devices and system memory with minimal CPU use, defined by specific timing protocols.
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Why convert from IDE (UDMA mode 2) to IDE (DMA mode 1)?
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Users convert to understand relative speeds between these legacy transfer modes, helping configure BIOS or drivers for better compatibility or performance.
Key Terminology
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IDE (UDMA mode 2)
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An Ultra DMA transfer mode for Parallel ATA interfaces offering approximately 33.3 MB/s theoretical transfer speed.
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IDE (DMA mode 1)
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A DMA mode for IDE/ATA devices enabling direct memory transfers with reduced CPU involvement.
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PATA
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Parallel ATA, a legacy interface standard for connecting storage devices.