ERROR_VOLMGR_EXTENT_ALREADY_USED

The specified extent is already used by other volumes.

Matched as: the code as given (hex)

HRESULT breakdown: code: 26, customer: False, facility: 56, severity: failure (bit 31 set), ntstatus_wrapped: False

Source: COM Error Codes (VOLMGR, BCD, VHD, SDIAG) (Winerror.h) · CC BY 4.0 · wording unchanged, formatting adapted for this site · retrieved 2026-10-24