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STATUS_FT_ORPHANING
A fault-tolerant member has become inaccessible
STATUS_FT_ORPHANING describes a transition in a redundant volume: a disk that belongs to the fault-tolerant set can no longer be accessed. “Orphaning” is about the member's relationship to the set, not about an ordinary orphaned file or directory.
Windows dynamic-disk documentation distinguishes mirrored and RAID-5 layouts from simple or spanned volumes because redundant members can preserve data availability after a failure. This status is therefore a degraded-storage signal. A successful read from another copy does not prove the inaccessible disk has recovered or that the set has returned to full redundancy.
Correlate the first orphaning event with controller resets, path loss, device removal and media errors. Preserve the member identity and volume configuration before replacing or reinitializing hardware. In multipath environments, verify whether only one path disappeared or the member itself is unreachable through all paths.
What to inspect
- The fault-tolerant volume layout and the member marked inaccessible.
- Last successful I/O to that disk and the first storage or controller event at failure time.
- Current redundancy, resynchronization and rebuild state before returning the volume to production.
References
- Microsoft: Basic and Dynamic Disks
- Microsoft Open Specifications: VDS glossary
- Microsoft: FsRtlIsTotalDeviceFailure
- Microsoft Open Specifications: NTSTATUS values
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