Editing Atari Stacy Troubleshooting Guide (section)

== SCSI hard drive diagnostics ==

For Stacy 2 (HD) and Stacy 4 models with internal hard drives:

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|+ '''Atari Stacy Troubleshooting — SCSI hard drive'''
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! Symptom !! Possible Cause !! Recommended Action
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| Hard drive not detected at boot || Drive failure; SCSI cable loose; no boot driver || Listen for drive spin-up. Reseat SCSI ribbon cable. Reinstall AHDI or ICD boot driver from floppy.
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| Drive spins but not recognised || SCSI ID conflict; missing termination; DMA fault || Verify SCSI ID is set correctly (typically ID 0). Check SCSI termination. Test DMA port with external device.
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| Drive clicks repeatedly || Mechanical failure (head crash or motor failure) || Drive has failed. Replace with working SCSI drive or SCSI2SD adapter.
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| Intermittent read/write errors || Failing drive; SCSI cable degradation; DMA issue || Back up data immediately. Try a different SCSI cable. Add DMA data bus pull-up resistors if not already fitted.
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| Boot from floppy works but HD does not appear on desktop || Boot driver not installed; partition table corrupt || Boot from floppy with AHDI or ICD utilities. Attempt to read partition table. Reformat and repartition if necessary.
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