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STATUS_VOLMGR_DISK_NOT_ENOUGH_SPACE
STATUS_VOLMGR_DISK_NOT_ENOUGH_SPACE says that Volume Manager cannot allocate enough usable space for the requested operation. "Usable" is the key word: it can be smaller than raw capacity or the visually unallocated area because alignment, reserved structures, existing extents, and volume rules apply.
Do not respond by immediately shrinking or deleting an adjacent partition. First identify the exact range requirement and the regions that VolMgr is allowed to use.
What to check
- Compare the proposed extent sizes with the allocatable ranges on each selected disk.
- Include metadata, alignment gaps, hidden partitions, and volume extents that do not have drive letters.
- Refresh inventory after resizing a virtual disk or changing a SAN/RAID presentation; Windows may not yet see the expected free range.
Microsoft: VDS disk extent types
Microsoft: DRIVE_LAYOUT_INFORMATION_EX
Microsoft: Volume Manager error codes
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