What does IDE (UDMA mode 4) refer to?

IDE (UDMA mode 4), also called Ultra DMA/66, is a PATA transfer mode providing a maximum theoretical throughput of about 66.7 MB/s using an 80-conductor IDE cable.

Why convert between IDE (UDMA mode 4) and IDE (DMA mode 2)?

Converting between these units helps compare and understand transfer speeds and efficiencies in legacy IDE hardware setups, useful for diagnostics and configuration.

Can this conversion be used for modern storage devices?

No, modern devices rarely use these IDE modes; conversion is mainly relevant for legacy or specialized older hardware maintenance.

Convert IDE (UDMA mode 4) to IDE (DMA mode 2) Data Transfer Units Online

Easily convert data transfer units between IDE (UDMA mode 4) and IDE (DMA mode 2) using our intuitive online unit converter, ideal for legacy PC maintenance and troubleshooting.

IDE (UDMA mode 4)

IDE (DMA mode 2)

Please check your input. It must be a valid numeric value.

IDE (UDMA mode 4) to IDE (DMA mode 2) Conversion Table

IDE (UDMA mode 4)	IDE (DMA mode 2)

Custom Unit Conversion Table Generator – Instant Printable Conversion Tables

Start Value

Enter the starting number (positive decimal or integer ≥ 0). Example: 0.1, 1, 5.

End Value

Enter the ending number (positive decimal or integer > Start Value). Example: 10, 50, 100.

Interval

Enter the step size (positive decimal > 0 and < End Value – Start Value). Example: 1.0, 2.5.

IDE (UDMA mode 4) to IDE (DMA mode 2) Conversion Table
IDE (UDMA mode 4)	IDE (DMA mode 2)

Explore More Data Transfer Units Converter

What Is This Tool?

This online converter helps you change data transfer units from IDE (UDMA mode 4) to IDE (DMA mode 2). It supports users working with legacy PATA/IDE hardware by providing straightforward unit conversions based on known theoretical rates.

How to Use This Tool?

Enter the value in IDE (UDMA mode 4) units you want to convert
Select IDE (DMA mode 2) as the target unit
Click the convert button to get the equivalent IDE (DMA mode 2) value
Use the results to aid configuration, benchmarking, or diagnostics of legacy hardware

Key Features

Converts between IDE (UDMA mode 4) and IDE (DMA mode 2) data transfer units
Based on established conversion rates for legacy IDE hardware
Browser-based and easy to use without installation
Supports troubleshooting and configuring older PATA/IDE systems
Includes examples for quick reference

Examples

1 IDE (UDMA mode 4) equals approximately 3.9759 IDE (DMA mode 2)
2 IDE (UDMA mode 4) equals approximately 7.9518 IDE (DMA mode 2)

Common Use Cases

Configuring or diagnosing legacy PATA/IDE hard drives and optical drives
Benchmarking and maintaining older storage hardware in legacy PC or embedded systems
Firmware or BIOS setup for ensuring proper DMA mode selection instead of slower PIO modes
Data recovery and troubleshooting in devices using older IDE standards

Tips & Best Practices

Verify compatibility of hardware before adjusting transfer modes
Use the conversion tool along with diagnostic data for accurate troubleshooting
Consider cable quality and firmware settings that affect actual performance
Apply conversion results primarily for legacy hardware and specialized maintenance

Limitations

Conversion rates are theoretical maximums and do not guarantee actual throughput
Performance may vary due to hardware condition, cable quality, or system configuration
Modern systems rarely use these IDE modes, limiting practical applications
Results should be interpreted within the context of legacy or specialized hardware environments

Frequently Asked Questions

What does IDE (UDMA mode 4) refer to?: IDE (UDMA mode 4), also called Ultra DMA/66, is a PATA transfer mode providing a maximum theoretical throughput of about 66.7 MB/s using an 80-conductor IDE cable.
Why convert between IDE (UDMA mode 4) and IDE (DMA mode 2)?: Converting between these units helps compare and understand transfer speeds and efficiencies in legacy IDE hardware setups, useful for diagnostics and configuration.
Can this conversion be used for modern storage devices?: No, modern devices rarely use these IDE modes; conversion is mainly relevant for legacy or specialized older hardware maintenance.

Key Terminology

IDE (UDMA mode 4): A Parallel ATA transfer mode using the Ultra DMA protocol with a theoretical maximum throughput of about 66.7 megabytes per second, requiring an 80-conductor IDE cable.
IDE (DMA mode 2): A Multiword DMA transfer mode for IDE devices that allows data transfer to or from system memory with minimal CPU intervention, offering higher throughput than PIO modes.
PIO mode: A program-controlled data transfer method in IDE devices that uses the CPU heavily for moving data, usually slower than DMA modes.

Quick Knowledge Check

What does IDE (UDMA mode 4) require for reliable signaling?

A standard 40-conductor IDE cable

An 80-conductor IDE cable

A SATA cable

Which mode reduces CPU overhead by enabling direct memory access?

PIO mode

IDE (DMA mode 2)

Ultra DMA mode 4

What is a common use for converting IDE (UDMA mode 4) to IDE (DMA mode 2)?

Configuring modern SSD drives

Benchmarking legacy storage hardware

Setting up network interfaces

Share Us

Similar Calculators

Online Density Units Converter Online Electric Resistance Units Converter Online Velocity Angular Units Converter Online Magnetic Flux Units Converter Online Luminance Units Converter