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IVssBackupComponents::GatherWriterStatus method

The GatherWriterStatus method prompts each writer to send a status message.

Syntax


HRESULT GatherWriterStatus(
  [out]  IVssAsync **ppAsync
);

Parameters

ppAsync [out]

Doubly indirect pointer to an IVssAsync object containing the writer status data.

Return value

The following are the valid return codes for this method.

ValueMeaning
S_OK

Successfully returned a pointer to an instance of the IVssAsync interface. See IVssAsync::QueryStatus for the valid values returned by the pHrResult parameter.

E_ACCESSDENIED

The caller does not have sufficient backup privileges or is not an administrator.

E_INVALIDARG

ppAsync does not point to a valid pointer; that is, it is NULL.

E_OUTOFMEMORY

The caller is out of memory or other system resources.

VSS_E_BAD_STATE

The backup components object is not initialized, this method has been called during a restore operation, or this method has not been called within the correct sequence.

VSS_E_UNEXPECTED

Unexpected error. The error code is logged in the error log file. For more information, see Event and Error Handling Under VSS.

Windows Server 2008, Windows Vista, Windows Server 2003, and Windows XP:  This value is not supported until Windows Server 2008 R2 and Windows 7. E_UNEXPECTED is used instead.

VSS_E_WRITER_INFRASTRUCTURE

The writer infrastructure is not operating properly. Check that the Event Service and VSS have been started, and check for errors associated with those services in the error log.

 

Remarks

The caller of this method should also call IVssBackupComponents::FreeWriterStatus after receiving the status of each writer.

After calling BackupComplete, requesters must call GatherWriterStatus to cause the writer session to be set to a completed state.

Note  This is only necessary on Windows Server 2008 with Service Pack 2 (SP2) and earlier.

The CVssWriter class handles the status message sent by each writer.

The caller is responsible for releasing the IVssAsync interface.

Requirements

Minimum supported client

Windows XP [desktop apps only]

Minimum supported server

Windows Server 2003 [desktop apps only]

Header

VsBackup.h (include VsBackup.h, Vss.h, or VsWriter.h)

Library

VssApi.lib

See also

IVssBackupComponents
IVssBackupComponents::FreeWriterStatus
IVssAsync
IVssAsync::QueryStatus
CVssWriter

 

 

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