What Is This Tool?
This tool allows users to convert data transfer values from the SCSI (Ultra-3) parallel storage interface standard to the IDE (PIO mode 3) programmed I/O transfer mode for Parallel ATA/IDE devices. It is designed to assist with benchmarking, compatibility checks, and data transfer comparisons between these two legacy storage transfer modes.
How to Use This Tool?
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Enter the value in SCSI (Ultra-3) units you wish to convert
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Select the target unit as IDE (PIO mode 3)
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Click the convert button to see the equivalent value
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Use the results to compare or adapt data transfer rates between the interfaces
Key Features
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Converts data transfer values from SCSI (Ultra-3) to IDE (PIO mode 3)
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Browser-based and easy to use without installation
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Supports legacy and embedded storage interface comparisons
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Provides conversion rates based on defined theoretical formulas
Examples
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1 SCSI (Ultra-3) converts to approximately 14.414 IDE (PIO mode 3)
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5 SCSI (Ultra-3) converts to about 72.072 IDE (PIO mode 3)
Common Use Cases
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Comparing storage transfer rates between enterprise server and desktop devices
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Diagnosing legacy server and storage subsystems involving SCSI and IDE interfaces
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Benchmarking parallel SCSI interface compatibility in storage array designs
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Supporting retrocomputing and historical performance testing for storage modes
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Interfacing embedded systems with older IDE devices without DMA support
Tips & Best Practices
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Verify hardware and bus configurations when applying conversion results
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Use this tool primarily for theoretical comparisons and benchmarking
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Consider the CPU-intensive nature of IDE (PIO mode 3) when evaluating performance
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Check device and controller compatibility as actual speeds may vary
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Keep in mind newer interfaces may replace parallel SCSI in modern setups
Limitations
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Conversion rates are theoretical and influenced by actual hardware setups
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IDE (PIO mode 3) is slower and more CPU-dependent compared to DMA modes
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SCSI (Ultra-3) speeds vary with device and controller implementations
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Parallel SCSI interfaces have largely been superseded by modern serial standards
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Real-world throughput may differ from the conversion estimates
Frequently Asked Questions
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What does SCSI (Ultra-3) represent?
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It is a generation of the parallel Small Computer System Interface specifying block-level data transfers between hosts and storage devices.
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What is IDE (PIO mode 3)?
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IDE (PIO mode 3) is a CPU-driven programmed I/O transfer mode for Parallel ATA/IDE devices with a maximum raw throughput near 11.1 MB/s.
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Why convert between SCSI (Ultra-3) and IDE (PIO mode 3)?
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Users convert to compare transfer speeds and compatibility when working with legacy servers, storage hardware, or embedded devices.
Key Terminology
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SCSI (Ultra-3)
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A parallel storage interface standard generation defining signaling and bus management for block-level data transfers.
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IDE (PIO mode 3)
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A programmed I/O transfer mode for Parallel ATA/IDE devices that is CPU-driven and has a theoretical throughput of about 11.1 MB/s.
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Conversion Rate
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The factor used to translate values from SCSI (Ultra-3) units to IDE (PIO mode 3), specifically 1 SCSI (Ultra-3) equals approximately 14.414 IDE (PIO mode 3).