Damaged HDD: what to do and what absolutely not to do

A desktop HDD starts clicking after a move across Warsaw, or an external drive freezes halfway through copying photos. The most damaging step is often the next test: another power-on, CHKDSK, formatting, opening the cover or scanning for hours on a weak disk.

This article does not describe the whole laboratory process. It explains the actions that most often reduce recovery options and when the better route is HDD data recovery.

Most common mistakes after an HDD failure

• Powering the drive on again and again to see whether it works now.
• Running CHKDSK, file-system repair or format prompts.
• Installing recovery software on the damaged drive.
• Opening the HDD cover at home or touching internal parts.
• Trying donor electronics without diagnosis.
• Copying for hours from a drive that clicks, freezes or disconnects.

When to stop attempts and prepare the drive for diagnosis

Stop using the HDD if it clicks, ticks, grinds, does not spin up, disappears from BIOS, freezes the computer, reports I/O errors, shows many pending sectors or contains the only copy of important files.

The same applies after a drop, liquid exposure, power surge, firmware update failure or unsuccessful DIY repair attempt.

Why home attempts can destroy recovery chances

A damaged HDD can still contain readable sectors. Repeated tests may worsen surface damage, make heads scratch platters, overwrite file-system structures or push firmware problems further.

Even if the original fault was logical, a wrong repair can turn it into a case with missing metadata, overwritten folders or damaged directory records.

Logical fault or physical HDD damage?

A logical problem usually means the drive spins normally but the file system is damaged: RAW volume, format prompt, copying errors, missing folders or garbled file names.

Physical symptoms are more serious: clicking, grinding, no spin, disappearing detection, unstable capacity, overheating or repeated freezes during reading. In those cases, do not scan the original drive for hours.

How to prepare the HDD for assessment

• Power the drive off and do not keep reconnecting it.
• Keep the original enclosure, adapter and cable if it is an external drive.
• Write down symptoms, last actions and what data matters most.
• Pack the drive so it cannot move during transport.
• Do not clean, open, freeze or shake the disk.

If the HDD needs diagnosis

If the data is important and the HDD is unstable, diagnosis should come before repair. For external drives, see also external USB drive data recovery; for noises, read what strange HDD noises can mean.