NTSTATUS 265 (STATUS_VOLUME_MOUNTED): meaning and diagnosis

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: A file system successfully mounted a newly available volume.

Could be also:
Constant	Type	OS
CRITICAL_STRUCTURE_CORRUPTION	BugCheck Code	Windows

Previous	Next
STATUS_OPLOCK_BREAK_IN_PROGRESS	STATUS_RXACT_COMMITTED

STATUS_VOLUME_MOUNTED

The volume entered the mounted state

This success status is a state transition, not an error. Mounting means a file-system driver recognized the volume and attached it to the storage stack so namespace and file operations can proceed.

Consumers that cache volume capabilities should refresh them after this event. A remounted volume at the same drive letter can have a different serial number, file-system type, feature set, or security state.

What to inspect

Record the volume GUID, serial number, file-system name, and mount point.
Invalidate caches tied only to a drive letter or device path.
Wait for any higher-level initialization required by filters, encryption, or clustered storage before assuming application readiness.

References

Looking for a different code? Search another status or error code.