What is IDE (UDMA mode 4)?

IDE (UDMA mode 4) is a Parallel ATA transfer mode from the late 1990s/early 2000s that uses Ultra DMA protocol for data transfer with a theoretical speed up to about 66.7 megabytes per second.

What does megabyte per second (SI def.) mean?

Megabyte per second (SI def.) is a data transfer rate equal to 1,000,000 bytes per second, using decimal units to quantify throughput.

Why convert IDE (UDMA mode 4) to megabyte/second (SI def.)?

Converting helps compare legacy device speeds with modern storage performance metrics in a consistent decimal-based unit.

How to Convert from IDE (UDMA mode 4) to Megabyte/second (SI def.)?

Learn how to convert data transfer rates from IDE (UDMA mode 4) to megabyte per second using SI decimal units, useful for comparing legacy storage speeds with modern performance metrics.

IDE (UDMA mode 4)

Megabyte/second (SI def.)

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IDE (UDMA mode 4) to Megabyte/second (SI def.) Conversion Table

IDE (UDMA mode 4)	Megabyte/second (SI def.)

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 Megabyte/second (SI def.) Conversion Table
IDE (UDMA mode 4)	Megabyte/second (SI def.)

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What Is This Tool?

This tool converts data transfer rates from IDE (UDMA mode 4), a legacy Parallel ATA transfer mode, to the megabyte per second unit defined by the SI decimal system, allowing users to compare and understand storage performance across different technologies.

How to Use This Tool?

Enter a value in IDE (UDMA mode 4) units representing the data transfer rate
Select megabyte/second (SI def.) as the target conversion unit
Execute the conversion to see the equivalent data rate in megabytes per second
Use the output to compare or analyze storage device performance

Key Features

Converts IDE (UDMA mode 4) transfer rates to megabyte/second (SI)
Supports comparisons between legacy and modern storage speeds
Browser-based and easy to use for quick conversions
Uses standard decimal definitions for megabyte per second
Provides example conversions for clarity

Examples

2 IDE (UDMA mode 4) equals 132 megabyte/second (SI def.)
0.5 IDE (UDMA mode 4) equals 33 megabyte/second (SI def.)

Common Use Cases

Comparing legacy IDE/ATA device speeds with modern storage units
Benchmarking and maintaining older storage hardware
Troubleshooting DMA modes in BIOS or firmware for legacy PCs
Data recovery efforts involving IDE devices
Reporting storage performance in engineering specifications

Tips & Best Practices

Verify cable quality since IDE (UDMA mode 4) requires 80-conductor cables for reliable data transfer
Consider that actual throughput may be lower than the theoretical maximum used in conversion
Be cautious when comparing with binary units like mebibyte per second
Use this conversion to align legacy device speeds with decimal-based modern reporting standards

Limitations

The throughput value for IDE (UDMA mode 4) is theoretical and actual speeds might be less
Conversion uses a rounded value of 66 megabytes per second, not the exact maximum
Differences between decimal megabytes and binary-based units may cause discrepancies
Not applicable for units outside of IDE (UDMA mode 4) and megabyte/second (SI def.)

Frequently Asked Questions

What is IDE (UDMA mode 4)?: IDE (UDMA mode 4) is a Parallel ATA transfer mode from the late 1990s/early 2000s that uses Ultra DMA protocol for data transfer with a theoretical speed up to about 66.7 megabytes per second.
What does megabyte per second (SI def.) mean?: Megabyte per second (SI def.) is a data transfer rate equal to 1,000,000 bytes per second, using decimal units to quantify throughput.
Why convert IDE (UDMA mode 4) to megabyte/second (SI def.)?: Converting helps compare legacy device speeds with modern storage performance metrics in a consistent decimal-based unit.

Key Terminology

IDE (UDMA mode 4): A Parallel ATA transfer mode using Ultra DMA protocol with a theoretical throughput near 66.7 megabytes per second, common in late-1990s to early-2000s PCs.
Megabyte per second (SI def.): A data transfer rate unit equal to 1,000,000 bytes transferred each second, based on decimal system units.
Ultra DMA: An advanced data transfer protocol used in IDE/ATA standards for high-speed data movement between drives and hosts.

Quick Knowledge Check

What is the theoretical maximum throughput of IDE (UDMA mode 4)?

About 100 megabytes per second

About 66 megabytes per second

About 50 megabytes per second

What does 1 megabyte per second (SI def.) represent?

1,024,000 bytes per second

1,000,000 bytes per second

1,048,576 bytes per second

Why must care be taken when comparing MB/s and MiB/s?

Because MB/s is binary and MiB/s is decimal

Because MB/s uses decimal units and MiB/s uses binary units

Because MB/s measures speed and MiB/s measures storage size

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