IVdsLun::Shrink method (vdshwprv.h)
[Beginning with Windows 8 and Windows Server 2012, the Virtual Disk Service COM interface is superseded by the Windows Storage Management API.]
Shrinks a LUN by a specified number of bytes.
Syntax
HRESULT Shrink(
[in] ULONGLONG ullNumberOfBytesToRemove,
[out] IVdsAsync **ppAsync
);
Parameters
[in] ullNumberOfBytesToRemove
The number of bytes by which to shrink the LUN. The number of bytes is not required to be an even multiple of the block or sector size.
[out] ppAsync
The address of an IVdsAsync interface pointer. Callers must release the interface. Use this interface to cancel, wait for, or query the status of the operation.
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 object is no longer present. |
|
The LUN 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
Implementers must return a pointer to the IVdsAsync interface for this method, regardless of whether the call initiates an asynchronous operation.
After the LUN is shrunk, the caller should use the IOCTL_DISK_UPDATE_PROPERTIES control code to make the updated disk size visible on the computer to which the LUN is unmasked.
Implementers must remove the bytes from the end of the LUN.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows Vista [desktop apps only] |
| Minimum supported server | Windows Server 2003 [desktop apps only] |
| Target Platform | Windows |
| Header | vdshwprv.h |
| Library | Uuid.lib |