Hard Drive Problems: Noise, Not Detected, Slow, SMART Warnings
Hard drives warn before they fail, through noise and SMART. Back up first. Copy your data while it is still readable, before diagnosing.
Clicking or grinding noise
A regular click is the head repeatedly failing to seek and resetting. This suggests progressing physical failure.
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- Power down and prepare to copy the data elsewhere. Continued operation makes it worse.
- Copy the most important files first, in a single pass. Repeated reads accelerate the damage.
- If the noise occurs only at spin-up, it may be insufficient power. Try a different PSU cable run.
Not detected in BIOS
Whether the platters spin tells you if the problem is power or data.
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- Touch the drive at power-on. No spin means a power problem.
- Move the power connector to a different cable run. The far end of a daisy chain can sag.
- Swap the SATA cable. They fail without visible damage.
- Try another SATA port; some are disabled when an M.2 slot is in use (see the manual).
SMART warning appeared
SMART predicts failures, though drives can also fail without warning. Treat any warning as real.
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- Copy everything off first. Diagnostics and repairs come after.
- Check reallocated and pending sector counts. Non-zero and increasing means replace.Tool: CrystalDiskInfo
- Check power-on hours. Tens of thousands of hours warrants replacement regardless of warnings.