IVdsLunPlex::QueryExtents method (vdshwprv.h)
Returns an array of the drive extents that contribute to the plex.
HRESULT QueryExtents( [out] VDS_DRIVE_EXTENT **ppExtentArray, [out] LONG *plNumberOfExtents );
A pointer to the array of pointers to drive extents passed in by the caller. These are the extents that contribute to the plex. See the VDS_DRIVE_EXTENT structure. Callers must free this array by using the CoTaskMemFree function.
A pointer to the number of drive extents returned in ppExtentArray.
This method can return standard HRESULT values, such as E_INVALIDARG or E_OUTOFMEMORY, and VDS-specific return values. It can also return converted system error codes using the HRESULT_FROM_WIN32 macro. Errors can originate from VDS itself or from the underlying VDS provider that is being used. Possible return values include the following.
||This return value signals a software or communication problem inside a provider that caches information about the array. Use the IVdsHwProvider::Reenumerate method followed by the IVdsHwProvider::Refresh method to restore the cache.|
||The LUN plex is no longer present.|
||The LUN plex is in a failed state, and is unable to perform the requested operation.|
||Another operation is in progress; this operation cannot proceed until the previous operation or operations are complete.|
Use the IVdsDrive::QueryExtents method to get the extents on a given drive.
|Minimum supported client||Windows Vista [desktop apps only]|
|Minimum supported server||Windows Server 2003 [desktop apps only]|