Storage · high

How to fix Physically bad sectors found on disk

Error code: BAD-SEC-UNC

What this error means

The HDD surface or SSD memory cell has been permanently damaged.

Updated

Before you begin

Save open work and back up important files. Use instructions for your exact device and software version. If Windows cannot start, see the startup guide.

Work through these checks

0 of 3 complete
01Back up all data immediately
  1. Back up all data immediately
What to expect

Check whether the original symptom still occurs.

If it does not help

Continue only if this check applies to your device. Consult its manufacturer if you are unsure.

Browse related errors
02Try replacing the SATA data cable
  1. Try replacing the SATA data cable
What to expect

Check whether the original symptom still occurs.

If it does not help

Continue only if this check applies to your device. Consult its manufacturer if you are unsure.

Browse related errors
03Run manufacturer diagnostics
  1. Run manufacturer diagnostics
What to expect

Check whether the original symptom still occurs.

If it does not help

Continue only if this check applies to your device. Consult its manufacturer if you are unsure.

Browse related errors

Possible causes

  • End of life (age)
  • Defective cable
  • Power outages
  • High temperatures in the M.2 slot