IVdsLun::Shrink 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[Beginning with Windows 8 and Windows Server 2012, the Virtual Disk Service COM interface is superseded by the Windows Storage Management API.]

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
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 LUN object is no longer present.
VDS_E_OBJECT_STATUS_FAILED
0x80042431L
The LUN 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

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

   
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

IVdsAsync

IVdsHwProvider::Reenumerate

IVdsHwProvider::Refresh

IVdsLun

IVdsLun::Extend