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STATUS_VOLMGR_NUMBER_OF_DISKS_IN_MEMBER_INVALID
One member describes an impossible disk composition
STATUS_VOLMGR_NUMBER_OF_DISKS_IN_MEMBER_INVALID is narrower than the overall disk-count error. The total request may contain a plausible number of disks, but the count associated with one member of a plex is invalid.
MS-DMRP notes that a volume member is a plex for a mirrored volume or a column/member for a RAID-5 volume. Because those roles have different topology, the member-level disk count must agree with the plex and volume type represented by the rest of the layout.
Inspect the member record and its referenced disk/extents as one unit. A serializer that calculates the parent counts correctly but truncates or duplicates a nested member array can produce this status while every physical disk remains healthy.
What to inspect
- Compare the member disk-count field with the disk entries actually attached to that member record.
- Verify the parent plex type and volume type match the member model the caller is encoding.
- Check nested array lengths and offsets if the request crosses a process, RPC, or structure-version boundary.
References
- Microsoft VOLMGR definition of STATUS_VOLMGR_NUMBER_OF_DISKS_IN_MEMBER_INVALID.
- MS-DMRP definition of volume member roles.
- MS-DMRP product behavior for volume member enumeration.
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