What does Windows error code 125 (ERROR_NO_VOLUME_LABEL) mean?

ERROR_NO_VOLUME_LABEL

What ERROR_NO_VOLUME_LABEL means

ERROR_NO_VOLUME_LABEL is a Win32 system result whose documented message is: “The disk has no volume label.” In practical troubleshooting, it belongs to file-system or removable-media code that asks for a volume label when the mounted volume has none.

Typical causes

• the volume was formatted without a label
• the label was removed after a script began relying on it
• a raw, damaged, or unusual file system cannot expose a normal label

How to investigate the result

1. query the volume serial number and file-system type in addition to the label
2. Verify the expected mount point resolves to the intended volume
3. Check whether the application incorrectly treats an empty label as a fatal identity failure

Developer guidance

Do not use the human-readable label as the sole volume identity. Handle an empty label explicitly and use stable identifiers such as volume GUID or serial where suitable.

Administrator and support guidance

Assign a label only if operational conventions require one and doing so is safe for the medium. First confirm that the correct volume is mounted.

Example

A deployment script searches removable media by label, but the technician formatted the drive without one, so the lookup returns this result.

How it differs from related results

This code says no label exists; it does not by itself indicate an unreadable or unformatted disk.

References

• Microsoft: System error codes 0–499