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IFileSystemImage::get_StageFiles method (imapi2fs.h)

  • Article

Indicates if the files being added to the file system image should be staged before the burn.

Syntax

HRESULT get_StageFiles(
  [out] VARIANT_BOOL *pVal
);

Parameters

[out] pVal

VARIANT_TRUE if the files being added to the file system image are required to be staged in one or more stage files before burning. Otherwise, VARIANT_FALSE is returned if IMAPI is permitted to optimize the image creation process by not staging the files being added to the file system image.

Return value

S_OK is returned on success, but other success codes may be returned as a result of implementation. The following error codes are commonly returned on operation failure, but do not represent the only possible error values:

Return code Description
E_POINTER
 Pointer is not valid.

Value: 0x80004003

Remarks

"Staging" is a process in which an image is created on the hard-drive, containing all files to be burned, prior to the initiation of the burn operation.

Setting this this property to VARIANT_TRUE via IFileSystemImage::put_StageFiles will only affect files that are added after the property is set: those files will always be staged. Files that were not staged prior to a specified property value of VARIANT_TRUE, will not be staged.

By specifying VARIANT_FALSE, the file system image creation process is optimized in two ways:

  • Less time is required for image generation
  • Less space is consumed on a local disk by IMAPI
However, in order to avoid buffer underrun problems during burning, a certain minimum throughput is required for read operations on non-staged files. In the event that file accessibility or throughput may not meet the requirements of the burner, IMAPI enforces file staging regardless of the specified property value. For example, file staging is enforced for source files from removable storage devices, such as USB Flash Disk.

Requirements

Requirement Value
Minimum supported client Windows Vista, Windows XP with SP2 [desktop apps only]
Minimum supported server Windows Server 2003 [desktop apps only]
Target Platform Windows
Header imapi2fs.h

See also

IFileSystemImage

IFileSystemImage::put_StageFiles