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[Beginning with Windows 8 and Windows Server 2012, the Virtual Disk Service COM interface is superseded by the Windows Storage Management API.]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
VDS_E_PROVIDER_CACHE_CORRUPT 0x8004241FL	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.
VDS_E_OBJECT_DELETED 0x8004240BL	The subsystem object is no longer present.
VDS_E_OBJECT_STATUS_FAILED 0x80042431L	The subsystem is in a failed state and is unable to perform the requested operation.
VDS_E_ANOTHER_CALL_IN_PROGRESS 0x80042404L	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

See also

IVdsHwProvider::Reenumerate

IVdsHwProvider::Refresh

IVdsLun::GetProperties

IVdsSubSystem