What does 'CHKDSK is not available for RAW drives' mean?

The short answer

It means your drive looks unreadable to Windows (RAW), so CHKDSK can’t run because there’s no valid file system to check.

Why this happens

A drive usually turns RAW when its file system metadata gets damaged or missing.

Common causes:

  • Unsafe unplugging of USB/external drives
  • Power loss during file writes
  • Bad sectors or failing hardware
  • File system corruption after a crash
  • Partition table issues

How to fix it

1) Stop writing to the drive

  • Do not format yet if you need the files.
  • New writes can overwrite recoverable data.

2) Check drive health

  • Try another USB port/cable/computer.
  • If the drive makes odd noises or disconnects often, it may be failing.

3) Recover data first (if important)

  • Use a trusted recovery tool to copy files off the RAW drive.
  • Recover to a different drive.

4) Repair by reformatting (after backup/recovery)

  • In Disk Management, format to NTFS or exFAT.
  • Then CHKDSK can run again on that volume if needed.

5) If format fails

  • Use diskpart to clean and recreate the partition.
  • If errors continue, replace the drive.

When should you worry?

Worry if:

  • The drive repeatedly becomes RAW
  • You see slow reads, disconnects, or clicking sounds
  • Multiple repair/format attempts fail

These are signs of possible hardware failure, not just a software glitch.