What Is This Tool?
This converter helps you translate data transfer values between IDE (DMA mode 2) and IDE (UDMA-33), two legacy Parallel ATA data transfer modes. It is useful for understanding, configuring, and troubleshooting older PATA storage devices and interfaces.
How to Use This Tool?
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Enter the value in IDE (DMA mode 2) units that you want to convert
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Select the target unit as IDE (UDMA-33)
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Click convert to see the resulting value in IDE (UDMA-33)
Key Features
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Converts data transfer values between IDE (DMA mode 2) and IDE (UDMA-33)
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Supports legacy PATA/IDE interface measurements
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Browser-based and easy to use
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Provides quick comparison of transfer rates in Multiword and Ultra DMA modes
Examples
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1 IDE (DMA mode 2) equals 0.503 IDE (UDMA-33)
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2 IDE (DMA mode 2) equals 1.006 IDE (UDMA-33)
Common Use Cases
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Configuring legacy PATA/IDE hard drives to ensure proper DMA mode settings
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Troubleshooting BIOS or controller transfer modes on older systems
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Benchmarking and comparing legacy PATA drive performance before upgrades
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Diagnosing storage interfaces by analyzing active DMA modes and transfer rates
Tips & Best Practices
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Verify hardware and controller compatibility when working with legacy PATA devices
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Ensure proper cabling to achieve expected transfer modes
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Use this conversion to balance performance and compatibility during drive configuration
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Consider device condition and system setup as factors affecting real-world performance
Limitations
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Both units represent legacy standards requiring compatible hardware and cables
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Actual transfer speeds may differ due to system configuration and device condition
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Conversion reflects theoretical relations and does not guarantee exact real-world performance
Frequently Asked Questions
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What is IDE (DMA mode 2)?
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It is a Multiword DMA data-transfer mode for IDE devices in legacy PATA interfaces that enables direct memory access with higher throughput and lower CPU overhead than PIO modes.
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What does IDE (UDMA-33) mean?
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IDE (UDMA-33), also called Ultra DMA mode 4 or ATA/33, is a legacy Parallel ATA transfer mode providing data transfer with a maximum theoretical burst rate of 33.3 MB/s, requiring compatible controllers and cables.
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Why convert between IDE (DMA mode 2) and IDE (UDMA-33)?
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Converting helps understand the relative performance between Multiword DMA and Ultra DMA modes, assisting in hardware configuration, benchmarking, and troubleshooting legacy storage devices.
Key Terminology
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IDE (DMA mode 2)
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A Multiword DMA data-transfer mode in legacy Parallel ATA interfaces that enables efficient data movement with low CPU intervention.
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IDE (UDMA-33)
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A legacy Ultra DMA mode also known as ATA/33 for Parallel ATA devices, offering a higher theoretical transfer burst rate of 33.3 MB/s.
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Parallel ATA (PATA)
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An older storage interface standard for connecting IDE devices using parallel data transmission.