What is IDE (UDMA mode 4)?

IDE (UDMA mode 4) is a Parallel ATA transfer mode using Ultra DMA protocol with a max theoretical throughput near 66.7 megabytes per second, commonly used in late 1990s to early 2000s PCs.

What does OC3 represent?

OC3 stands for Optical Carrier level 3, a synchronous optical networking rate of 155.52 megabits per second used for long-distance fiber transmission and backbone networking.

Why convert IDE (UDMA mode 4) speeds to OC3?

Converting IDE rates to OC3 helps compare or aggregate legacy storage data rates with modern optical transmission speeds for benchmarking, network planning, or bridging old and new technologies.

How to Convert from IDE (UDMA mode 4) to OC3

Learn how to convert data transfer rates from IDE (UDMA mode 4) to OC3 units. This guide explains the conversion formula, use cases, and practical examples for comparing legacy IDE interface speeds with optical carrier network rates.

IDE (UDMA mode 4)

OC3

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IDE (UDMA mode 4) to OC3 Conversion Table

IDE (UDMA mode 4)	OC3

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 OC3 Conversion Table
IDE (UDMA mode 4)	OC3

Explore More Data Transfer Units Converter

What Is This Tool?

This converter allows users to transform data transfer rates measured in IDE (UDMA mode 4), a legacy Parallel ATA transfer mode, into OC3 units, which represent optical transmission speeds in synchronous networking. It helps bridge old storage interface speeds with modern telecom standards.

How to Use This Tool?

Enter the data transfer value in IDE (UDMA mode 4) units
Select IDE (UDMA mode 4) as the source unit
Choose OC3 as the target unit
Initiate the conversion to see equivalent OC3 values

Key Features

Converts IDE (UDMA mode 4) transfer rates to OC3 optical carrier speeds
Supports legacy data transfer benchmarking and network capacity planning
Browser-based tool requiring no installation
Provides clear example conversions for user reference

Examples

1 IDE (UDMA mode 4) equals approximately 3.395 OC3
2 IDE (UDMA mode 4) equals approximately 6.79 OC3

Common Use Cases

Comparing legacy IDE data rates with modern optical network speeds
Benchmarking and troubleshooting older storage devices supporting ATA-66
Planning network capacity involving both storage and telecom equipment
Data recovery from legacy IDE drives where speed comparison is relevant

Tips & Best Practices

Verify unit definitions before converting to ensure valid data interpretation
Consider differences in physical media when comparing speeds
Use conversion results as reference points rather than exact application compatibility
Understand that IDE (UDMA mode 4) rates are theoretical maximums, not sustained

Limitations

IDE (UDMA mode 4) reflects theoretical max throughput and may not indicate sustained speeds
OC3 and IDE (UDMA mode 4) use different base units (megabits/sec vs megabytes/sec), requiring cautious interpretation
Physical protocols and media differ, so conversions relate only to rate equivalences and not interoperability

Frequently Asked Questions

What is IDE (UDMA mode 4)?: IDE (UDMA mode 4) is a Parallel ATA transfer mode using Ultra DMA protocol with a max theoretical throughput near 66.7 megabytes per second, commonly used in late 1990s to early 2000s PCs.
What does OC3 represent?: OC3 stands for Optical Carrier level 3, a synchronous optical networking rate of 155.52 megabits per second used for long-distance fiber transmission and backbone networking.
Why convert IDE (UDMA mode 4) speeds to OC3?: Converting IDE rates to OC3 helps compare or aggregate legacy storage data rates with modern optical transmission speeds for benchmarking, network planning, or bridging old and new technologies.

Key Terminology

IDE (UDMA mode 4): A Parallel ATA transfer mode using Ultra DMA protocol with a max theoretical throughput of about 66.7 megabytes per second.
OC3: An Optical Carrier level 3 transmission rate in SONET networks, operating at 155.52 megabits per second.
Ultra DMA: A protocol in IDE/ATA standards for moving blocks of data between storage devices and host systems with improved speed over previous methods.

Quick Knowledge Check

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

155.52 megabits per second

About 66.7 megabytes per second

3.395 OC3 units

What type of networking rate does OC3 represent?

Parallel ATA transfer rate

SONET optical transmission at 155.52 Mbps

Legacy IDE device speed

Why must unit considerations be taken when converting between IDE (UDMA mode 4) and OC3?

Because IDE uses megabytes/s and OC3 uses megabits/s

Because both use the exact same physical media

Because IDE is only for optical networks

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