NTFS
CHKDSK Is Not Available for RAW Drives
What the message means and how to recover instead.
Written by the Refindo Recovery Team · Published · Updated
Running chkdsk on a drive that will not open and getting "The type of the file system is RAW. CHKDSK is not available for RAW drives" tells you something specific: Windows cannot find a valid NTFS structure to check, so its repair tool refuses to run. That is actually good news for your data. chkdsk rewrites file-system metadata, and a tool that declines to touch a damaged volume has not made things worse. The files are usually still there to be scanned.
Do not format just because chkdsk failed
chkdsk backing off is a reprieve, not a dead end. The volume is RAW because its metadata is unreadable, but the data underneath is usually intact — scan it before you format, which is the only thing chkdsk leaves you tempted to do.
- Do not format the drive because chkdsk would not run.
- Do not force chkdsk with switches that try to write to a RAW volume.
- Do not convert or repartition the drive before recovery.
- Recover to a separate disk, not back onto the RAW drive.
Why chkdsk refuses a RAW drive
- A damaged NTFS boot sector or Master File Table that leaves the volume RAW.
- An unsafe removal or power loss during a write.
- Bad sectors in the file-system metadata at the start of the partition.
- A previous failed repair that left the structures inconsistent.
How to recover from a RAW drive
Refindo can scan a RAW drive that chkdsk refuses, reading the volume directly to find files. Because chkdsk has not modified anything, the original structures are still available for the best possible result.
- Note the RAW status and capacity in Disk Management, and do not format the drive.
- Reconnect the drive directly with a known-good cable.
- Open Refindo and select the RAW volume without running any repair.
- Run Deep Scan to rebuild files from NTFS records or signatures, then recover to another drive.
When the drive is failing
- The drive disconnects during the scan or reports read errors.
- The RAW drive holds the only copy of critical data.
- A format has already been run since chkdsk failed.
- The drive shows bad sectors or an incorrect capacity.
What chkdsk checks, and why RAW blocks it
Why chkdsk cannot run on RAW
chkdsk checks and repairs file-system structures — the Master File Table, index entries, the allocation bitmap, and the boot sector — and it needs a recognizable file system to work on. When a volume is RAW, Windows cannot identify NTFS at all, so chkdsk has nothing valid to verify and exits with the "not available for RAW drives" message. It is not a failure of your drive so much as chkdsk correctly declining to operate blind.
Why the refusal helps recovery
On a damaged-but-recognized NTFS volume, chkdsk can move orphaned files into found.000 folders or rewrite metadata in ways that reduce what a scan recovers. A RAW volume sidesteps all of that: because chkdsk would not run, the original structures are untouched, and a recovery tool gets the cleanest possible view of the surviving file records and data.
Frequently Asked Questions
What does "CHKDSK is not available for RAW drives" mean?
It means Windows cannot find a valid file system on the drive, so chkdsk has nothing to check. The volume is RAW, and the data is usually still recoverable.
How do I fix a RAW drive if chkdsk will not run?
Do not try to force chkdsk or format. Scan the RAW volume with recovery software first, recover your files, then format the drive to make it usable again.
Is it bad that chkdsk would not run?
No — it is helpful. Because chkdsk did not modify the volume, the original structures are intact, which gives recovery software the best chance.
Can I still get my files from a RAW drive?
Usually, yes, when Windows still detects the drive. A deep scan reads the volume directly and rebuilds files from surviving NTFS records or signatures.
Should I format the drive to clear the RAW state?
Only after recovery. Formatting clears RAW by writing a new file system, which discards your data. Recover first, then format.
Scan before you repair
Run a read-only scan first, preview what is recoverable, then save selected files to a different drive.