Hard drive CRC errors: protect data and narrow down the cause

CRC errors: back up before attempting repairs – 19 September 2026

A CRC error reports a failed data check; it alone does not prove mechanical drive damage. The 2013 instructions below are historical. Their repair checkboxes are not a safe universal first step. This is editorial guidance, not a new hardware test.

CHKDSK /r includes /f, so it is not read-only. If a drive has input/output errors, plan data recovery before repairing its file system.

  1. Record the exact error, file, drive and connection. Stop experimenting if there are unusual noises, repeated disconnections or important unbacked-up data.
  2. Check an independent backup for completeness. Do not restore missing files to the affected drive or accept formatting or initialisation prompts.
  3. Only investigate a connection issue on a stable device without warning signs, following its manufacturer's instructions. Shut down and disconnect power before handling internal cables. Do not use repeated repairs as a diagnostic test.
  4. After backup or work on a copy, verify results by opening files and checking the report. A completed scan does not make a faulty drive reliable again.

The historical Smart Data Recovery link leads to another old article, not a verified current product recommendation. Recovery software cannot guarantee success. The screenshots show the Windows interface of that period, not Windows 11.

Sources

Backup and formatting limits

Historical original report — 03.09.2013

CRC error of hard drive repair

What is a CRC error? The original report explains that cyclic redundancy checking of a hard drive has failed: part of a file read from the drive does not match the expected value. The report interpreted this as indicating a damaged drive.

Historical repair procedure from 2013

  1. Click Start, then Computer.
  2. Right-click the affected drive and select Properties.
  3. Open the Tools tab.
  4. Under Error-checking, click Check now.
  5. Select Automatically fix file system errors and Scan for and attempt recovery of bad sectors.
  6. Click Start in the disk-check window to begin checking and repairing.
  7. When asked whether to schedule the check for the next computer startup, answer Yes.
  8. Restart the computer.
Open the Computer view.
Open the Computer view.
The overview of local and network drives appears.
The overview of local and network drives appears.
Open the drive's Tools tab.
Open the drive's Tools tab.
Select the checkboxes and click Start.
Select the checkboxes and click Start.

The original report mentioned recovery software for lost files but made no recommendation about whether recovery would succeed: a drive could be too severely damaged for software recovery.

The linked Smart Data Recovery article presents products. Smart Data Recovery