IVdsSubSystem::Reenumerate 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[Beginning with Windows 8 and Windows Server 2012, the Virtual Disk Service COM interface is superseded by the Windows Storage Management API.]
Prompts the subsystem to scan its bus to discover newly-connected drives or newly-disconnected drives.
Syntax
HRESULT Reenumerate();
Return value
This method can return standard HRESULT values, such as 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 subsystem object is no longer present. |
|
The subsystem 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
Most subsystems detect new connections and disconnections automatically. However, for those that do not, this method provides a means by which to initiate detection manually. This operation can take a long time to complete.
When this method detects a newly connected drive, the provider creates a new drive object for it. When the method detects a newly disconnected drive, the provider preserves the old drive object until its last VDS reference is removed, and then deletes the object.
Each object should have a unique and persistent identifier. An object ID must be a valid GUID. Implementers should persist an object ID across each reenumeration by using this method for objects that exist both before and after the reenumeration.
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 |