What Is This Tool?
This converter allows you to translate data transfer rates from SCSI (Fast), a legacy parallel SCSI bus extension, to IDE (PIO mode 1), a programmed I/O transfer mode for older Integrated Drive Electronics devices. It helps in understanding and comparing performance between these two legacy storage interfaces.
How to Use This Tool?
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Enter the value you want to convert in SCSI (Fast) units
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Select SCSI (Fast) as the starting unit and IDE (PIO mode 1) as the target unit
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Click the convert button to see the equivalent IDE (PIO mode 1) transfer rate
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Interpret the result to assist with legacy storage device diagnostics or development
Key Features
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Converts data transfer values between SCSI (Fast) and IDE (PIO mode 1) units
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Useful for legacy IT systems, vintage computing, and embedded equipment
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Browser-based tool requiring no installation
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Supports conversion for storage device performance comparisons
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Allows easy translation of legacy parallel SCSI throughput to CPU-controlled PIO mode rates
Examples
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1 SCSI (Fast) × 1.9230769231 = 1.9230769231 IDE (PIO mode 1)
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5 SCSI (Fast) × 1.9230769231 = 9.6153846155 IDE (PIO mode 1)
Common Use Cases
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Connecting and diagnosing legacy SCSI and IDE drives in older servers or workstations
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Converting throughput metrics for RAID or disk-array systems using parallel SCSI
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Developing or debugging firmware where CPU-driven IDE PIO transfers are needed
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Benchmarking data-transfer behavior on vintage or embedded computing systems
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Supporting industrial or laboratory equipment with legacy SCSI and PATA interfaces
Tips & Best Practices
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Use the converter to obtain approximate transfer rates for compatibility checks
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Consider CPU overhead when interpreting IDE (PIO mode 1) performance
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Apply conversions primarily in legacy system maintenance or embedded development
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Verify results with real-world hardware tests when possible
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Keep in mind device-specific factors may affect actual transfer speeds
Limitations
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Conversions are approximate due to legacy hardware variability
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Performance depends on specific device implementations and bus timings
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CPU overhead influences IDE PIO mode 1 throughput independently of raw transfer rate
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Not suitable for modern high-speed serial interface comparisons
Frequently Asked Questions
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What does SCSI (Fast) refer to?
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SCSI (Fast) is a parallel SCSI bus extension that increases the synchronous transfer rate of classic SCSI standards, typically doubling throughput to about 10 MB/s for legacy storage devices.
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What is IDE (PIO mode 1)?
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IDE (PIO mode 1) is a programmed input/output transfer mode for PATA devices where the host CPU controls data transfers, offering moderate throughput with higher CPU usage compared to DMA modes.
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Why convert between SCSI (Fast) and IDE (PIO mode 1)?
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Conversion helps compare and translate legacy parallel SCSI throughput to equivalent programmed I/O transfer rates, which is useful for compatibility, diagnostics, and maintenance in older or embedded systems.
Key Terminology
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SCSI (Fast)
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A parallel SCSI bus extension enhancing synchronous transfer rates in legacy storage devices.
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IDE (PIO mode 1)
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A programmed I/O transfer mode for PATA devices where the CPU manages each data cycle.
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Data Transfer Rate
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The speed at which data moves between a host and storage peripheral.