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STATUS_MEDIA_CHANGED
The removable medium may have changed since the last access
The storage stack detected a unit-attention or equivalent event indicating that media was inserted, removed, or replaced. Cached geometry, partition, file-system, tape-position, or volume-identity information can therefore be stale.
The correct response is to invalidate media-dependent state and re-identify the inserted volume. Retrying the original I/O with old offsets is unsafe, especially for writable removable media or robotic libraries. A reset can also cause a device to report media change even when the same cartridge remains loaded.
What to inspect
- Re-query media parameters, unique identity, write protection, and current position.
- Discard cached layout and catalog bindings tied to the previous insertion generation.
- Confirm the expected volume before permitting writes or automatic formatting.
References
- Microsoft: Windows storage driver interfaces
- Microsoft: TAPE_GET_MEDIA_PARAMETERS
- Seagate: SCSI Commands Reference Manual
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