What Is This Tool?
This unit converter helps translate data transfer performance from SCSI (Fast Ultra Wide), a legacy parallel interface for storage devices, to IDE (PIO mode 3), a CPU-driven programmed I/O mode for IDE devices. It facilitates comparison of theoretical throughput values between these distinct legacy storage technologies.
How to Use This Tool?
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Enter the value in SCSI (Fast Ultra Wide) units you wish to convert.
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Select the target unit as IDE (PIO mode 3) from the dropdown options.
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Click convert to see the equivalent value displayed instantly.
Key Features
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Converts data transfer rates from SCSI (Fast Ultra Wide) to IDE (PIO mode 3)
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Displays theoretical maximum throughput equivalence
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Supports legacy technology performance comparisons
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Browser-based and easy to use
Examples
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1 SCSI (Fast Ultra Wide) equals approximately 3.6 IDE (PIO mode 3) when rounded.
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2 SCSI (Fast Ultra Wide) converts to 7.2 IDE (PIO mode 3).
Common Use Cases
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Comparing throughput of older server RAID controllers using SCSI interfaces with IDE storage devices.
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Assessing legacy tape backup systems and enterprise storage connected by parallel SCSI.
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Testing and retrocomputing scenarios involving IDE devices operated in BIOS or compatibility modes.
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Hardware emulation requiring performance equivalence understanding between SCSI and IDE modes.
Tips & Best Practices
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Use conversions as approximate theoretical comparisons rather than exact real-world speeds.
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Consider CPU overhead and device-specific behavior for practical assessments.
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Apply the tool for legacy system compatibility testing and historical performance evaluation.
Limitations
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Conversion values represent theoretical maximum throughput, not actual speeds.
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Both units correspond to legacy interface modes, not standardized SI units.
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Real device performance may vary due to bus contention and CPU processing overhead.
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These modes are outdated and not used in modern mainstream hardware.
Frequently Asked Questions
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What is SCSI (Fast Ultra Wide)?
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It is a legacy parallel Small Computer System Interface mode that uses a wider data bus and faster signalling to increase throughput for storage device connections.
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What does IDE (PIO mode 3) mean?
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IDE (PIO mode 3) is a CPU-driven programmed I/O transfer mode for Parallel ATA storage devices, with a theoretical raw data throughput limit.
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Why convert between SCSI (Fast Ultra Wide) and IDE (PIO mode 3)?
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To compare and understand data transfer performance differences between legacy high-throughput SCSI and older CPU-driven IDE storage modes.
Key Terminology
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SCSI (Fast Ultra Wide)
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A legacy parallel interface mode with a wider data bus and faster signalling for connecting storage devices.
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IDE (PIO mode 3)
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A programmed I/O transfer mode for IDE devices that is CPU-driven and has a theoretical max throughput of about 11.1 MB/s.
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Data Transfer
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The process of moving data between devices or components, often measured in throughput or speed units.