IVdsLunPlex::QueryExtents method (vds.h)
[Beginning with Windows 8 and Windows Server 2012, the Virtual Disk Service COM interface is superseded by the Windows Storage Management API.]
Returns an array of the drive extents that contribute to the plex.
Syntax
HRESULT QueryExtents(
[out] VDS_DRIVE_EXTENT **ppExtentArray,
[out] LONG *plNumberOfExtents
);
Parameters
[out] ppExtentArray
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.
[out] plNumberOfExtents
A pointer to the number of drive extents returned in ppExtentArray.
Return value
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.
| Return code/value | Description |
|---|---|
|
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. |
Remarks
Use the IVdsDrive::QueryExtents method to get the extents on a given drive.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows Vista [desktop apps only] |
| Minimum supported server | Windows Server 2003 [desktop apps only] |
| Target Platform | Windows |
| Header | vds.h |
| Library | Uuid.lib |