EjectDiskFromSADrive Function

Artikel
06/09/2011

[Removable Storage Manager is no longer available as of Windows 7 and Windows Server 2008 R2.]

The EjectDiskFromSADrive function ejects the media that is in a standalone removable drive.

Syntax

DWORD EjectDiskFromSADrive(
  __in  LPCWSTR lpComputerName,
  __in  LPCWSTR  lpAppName,
  __in  LPCWSTR  lpDeviceName,
  __in  HWND  hWnd,
  __in  LPCWSTR  lpTitle,
  __in  LPCWSTR   lpMessage,
  __in  DWORD    dwOptions
);

Parameters

lpComputerName [in]
Removable Storage Manager (RSM) server name. If this parameter is NULL, the current computer name is used.
lpAppName [in]
Unique character string that identifies the application. This name identifies resources and operator requests. This parameter is optional and may be NULL.
lpDeviceName [in]
Name of the device to eject. For example, \\.\Cdrom0 or \\.\PhysicalDriveX (where X is the number of the drive being accessed).
hWnd [in]
Handle to a dialog box window for user confirmation.
lpTitle [in]
Title displayed in a dialog box to get user input.
lpMessage [in]
Message displayed in a dialog box to get user input.

dwOptions [in]
Action to perform. This parameter can be one of the following values.

Value	Meaning
NTMS_EJECT_START	Start the eject operation with a port. The specified medium is ejected until the time-out event occurs or the function is called again with NTMS_EJECT_STOP. The time-out value is specified in the library object and is applied to all ejections in the library.
NTMS_EJECT_STOP	Terminate the ejection process before the time-out event lapses.
NTMS_EJECT_QUEUE	Allow the eject to be asynchronous. The function queues the specified media for ejection and then returns.
NTMS_EJECT_FORCE	Force the media to be ejected. For example, NTFS can hold locks on media, and this option will cause the media to be ejected despite that lock.
NTMS_EJECT_IMMEDIATE	Eject the media immediately and synchronously. The function will not return until the eject is complete. Does not queue the specified media for ejection.
NTMS_EJECT_ASK_USER	Eject the media immediately and synchronously. The function will not return until the eject is complete. Does not queue the specified media for ejection. If the eject operation fails, prompt the user to either cancel or force the operation.

Return Value

This function returns one of the following values.

Value	Meaning
ERROR_ACCESS_DENIED	NTMS_CONTROL_ACCESS to the library is denied. Other security errors are also possible, but they would indicate a security subsystem error.
ERROR_DATABASE_FAILURE	The database is inaccessible or damaged.
ERROR_DATABASE_FULL	The database is full.
ERROR_DEVICE_NOT_AVAILABLE	The library is disabled.
ERROR_INVALID_HANDLE	The session ID is missing or is not valid.
ERROR_INVALID_OPERATION	A stop was performed on an operation ID that was not valid.
ERROR_INVALID_PARAMETER	A library ID or operation ID pointer is missing.
ERROR_LIBRARY_OFFLINE	The library ID refers to an offline library that cannot eject media.
ERROR_MEDIA_NOT_AVAILABLE	The media is disabled.
ERROR_NOT_ENOUGH_MEMORY	There was an allocation failure during processing.
ERROR_SUCCESS	The eject operation was successful.

Remarks

Although EjectNtmsMedia can, in some cases, be used to accomplish the same functionality, EjectDiskFromSADrive provides a convenient way to eject media from a standalone device, by specifying its drive name instead of its RSM name. In some cases it is the only way to overcome file system locks on the media in order to eject that media.

The EjectDiskFromSADrive function returns to the application as soon as the eject request is queued, unless NTMS_EJECT_IMMEDIATE option is specified.

Media ejected using the EjectDiskFromSADrive function is moved to the offline library or deleted from the database. Import media, unrecognized media, and incompatible media are deleted when ejected.

The EjectDiskFromSADrive function does not work with the offline library.

Requirements

Minimum supported client	Windows Vista
Minimum supported server	Windows Server 2003
End of client support	Windows Vista
End of server support	Windows Server 2008
Header	Ntmsapi.h
Library	Ntmsapi.lib
DLL	Ntmsapi.dll
Unicode and ANSI names	EjectDiskFromSADriveW (Unicode) and EjectDiskFromSADriveA (ANSI)

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