What does IDE (UDMA mode 2) mean?

It is an Ultra DMA transfer mode for PATA devices providing a maximum theoretical transfer rate of about 33.3 megabytes per second.

Why is IDE (PIO mode 1) slower than IDE (UDMA mode 2)?

Because PIO mode requires the CPU to control each transfer cycle, resulting in higher CPU overhead and lower throughput compared to DMA modes.

Can this conversion be used for SATA or NVMe devices?

No, this conversion only applies to legacy PATA/IDE interfaces and does not reflect transfer rates of newer SATA or NVMe devices.

How to Convert from IDE (UDMA mode 2) to IDE (PIO mode 1)?

Convert data transfer rates between IDE (UDMA mode 2) and IDE (PIO mode 1) to compare legacy PATA device performance and troubleshoot hardware issues.

IDE (UDMA mode 2)

IDE (PIO mode 1)

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

IDE (UDMA mode 2) to IDE (PIO mode 1) Conversion Table

IDE (UDMA mode 2)	IDE (PIO mode 1)

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 2) to IDE (PIO mode 1) Conversion Table
IDE (UDMA mode 2)	IDE (PIO mode 1)

Explore More Data Transfer Units Converter

What Is This Tool?

This tool converts data transfer units from IDE (UDMA mode 2), a fast Ultra DMA mode for legacy PATA devices, to IDE (PIO mode 1), a slower CPU-controlled transfer mode. It helps understand performance differences in older hardware setups.

How to Use This Tool?

Enter the numerical value in IDE (UDMA mode 2) you want to convert
Select IDE (PIO mode 1) as the target unit
Click convert to see the equivalent value in IDE (PIO mode 1)
Use the converted result to analyze or configure legacy hardware

Key Features

Converts between IDE (UDMA mode 2) and IDE (PIO mode 1) data transfer modes
Provides straightforward conversion for legacy PATA interface settings
Supports hardware performance comparison and troubleshooting
Browser-based and easy to use without installation

Examples

1 IDE (UDMA mode 2) equals 6.3461538462 IDE (PIO mode 1)
2 IDE (UDMA mode 2) equals 12.6923076924 IDE (PIO mode 1)

Common Use Cases

Configuring or identifying legacy PC BIOS and drive-controller transfer settings
Benchmarking older hard drives and optical drives for transfer speeds
Troubleshooting compatibility and firmware issues on PATA systems
Developing or debugging firmware requiring CPU-driven transfer modes
Measuring data transfer on vintage or embedded systems using PIO mode

Tips & Best Practices

Verify the legacy PATA hardware supports the transfer mode before conversion
Use conversions to understand relative performance rather than exact speeds
Consider higher CPU utilization effects when working with PIO modes
Apply results primarily for legacy systems, not modern SATA or NVMe devices

Limitations

Conversion rates represent theoretical maximum speeds, actual may vary
PIO modes use more CPU resources affecting system responsiveness
Only applicable for legacy PATA/IDE interfaces, not newer technologies

Frequently Asked Questions

What does IDE (UDMA mode 2) mean?: It is an Ultra DMA transfer mode for PATA devices providing a maximum theoretical transfer rate of about 33.3 megabytes per second.
Why is IDE (PIO mode 1) slower than IDE (UDMA mode 2)?: Because PIO mode requires the CPU to control each transfer cycle, resulting in higher CPU overhead and lower throughput compared to DMA modes.
Can this conversion be used for SATA or NVMe devices?: No, this conversion only applies to legacy PATA/IDE interfaces and does not reflect transfer rates of newer SATA or NVMe devices.

Key Terminology

IDE (UDMA mode 2): An Ultra DMA transfer mode for Parallel ATA interfaces with a maximum theoretical transfer rate around 33.3 MB/s.
IDE (PIO mode 1): A Programmed Input/Output transfer mode where the CPU controls data transfers, resulting in lower throughput and higher CPU usage.
PATA: Parallel ATA, a legacy interface standard for connecting storage devices like hard drives and optical drives.

Quick Knowledge Check

What is the primary difference between IDE (UDMA mode 2) and IDE (PIO mode 1)?

UDMA mode 2 is CPU-controlled while PIO mode 1 uses direct memory access

UDMA mode 2 uses DMA for transfers; PIO mode 1 relies on CPU control

Both modes use the same transfer method but at different speeds

Why might you convert IDE (UDMA mode 2) values to IDE (PIO mode 1)?

To calculate disk storage capacity

To compare relative data transfer speeds of different modes

To upgrade legacy hardware to modern SSDs

Which limitation applies to converting between these modes?

The conversion reflects real-time transfer speeds exactly

It only applies to legacy PATA/IDE devices

It is valid for SATA and NVMe devices as well

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