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STATUS_VOLMGR_PLEX_MISSING
A complete-copy plex expected by the volume layout is absent
STATUS_VOLMGR_PLEX_MISSING reports a missing plex, not merely one missing disk extent. Since a plex is a complete copy of volume data, the error has volume-level redundancy significance.
The practical effect depends on the remaining plexes and volume type. A mirrored volume may continue through another active copy, while a management operation that targets the missing plex cannot proceed. The status itself does not say whether the underlying disk is powered off, failed, detached, or unavailable through the storage fabric.
Map the plex to its constituent extents and disks, then inspect those devices and the containing pack. Avoid creating a new plex until you know whether the original storage can return, because duplicate or stale topology can complicate recovery and import.
What to inspect
- List the disks and extents that belonged to the missing plex and check their current OS visibility.
- Assess whether another plex remains active and whether the volume is Failed Redundancy or fully unavailable.
- Refresh pack metadata after correcting storage paths before initiating a replacement or regeneration workflow.
References
- Microsoft VOLMGR entry for STATUS_VOLMGR_PLEX_MISSING.
- Microsoft VDS description of plexes and disk extents.
- Microsoft troubleshooting for Missing and Offline dynamic disks.
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