GetTapeParameters function (winbase.h)
The GetTapeParameters function retrieves information that describes the tape or the tape drive.
DWORD GetTapeParameters( [in] HANDLE hDevice, [in] DWORD dwOperation, [out] LPDWORD lpdwSize, [out] LPVOID lpTapeInformation );
Handle to the device about which information is sought. This handle is created by using the CreateFile function.
Type of information requested. This parameter must be one of the following values.
||Retrieves information about the tape device.|
||Retrieves information about the tape in the tape device.|
Pointer to a variable that receives the size, in bytes, of the buffer specified by the lpTapeInformation parameter. If the buffer is too small, this parameter receives the required size.
Pointer to a structure that contains the requested information. If the dwOperation parameter is GET_TAPE_MEDIA_INFORMATION, lpTapeInformation points to a TAPE_GET_MEDIA_PARAMETERS structure.
If dwOperation is GET_TAPE_DRIVE_INFORMATION, lpTapeInformation points to a TAPE_GET_DRIVE_PARAMETERS structure.
If the function succeeds, the return value is NO_ERROR.
If the function fails, it can return one of the following error codes.
||An attempt to access data before the beginning-of-medium marker failed.|
||A reset condition was detected on the bus.|
||The partition information could not be found when a tape was being loaded.|
||The end-of-tape marker was reached during an operation.|
||A filemark was reached during an operation.|
||The block size is incorrect on a new tape in a multivolume partition.|
||The tape that was in the drive has been replaced or removed.|
||The end-of-data marker was reached during an operation.|
||There is no media in the drive.|
||The tape driver does not support a requested function.|
||The tape could not be partitioned.|
||A setmark was reached during an operation.|
||An attempt to lock the ejection mechanism failed.|
||An attempt to unload the tape failed.|
||The media is write protected.|
The block size range values (maximum and minimum) returned by the GetTapeParameters function called with the dwOperation parameter set to the GET_TAPE_DRIVE_INFORMATION value will indicate system limits, not drive limits. However, it is the tape drive device and the media present in the drive that determine the true block size limits. Thus, an application may not be able to set all the block sizes mentioned in the range obtained by specifying GET_TAPE_DRIVE_INFORMATION in dwOperation.
|Minimum supported client||Windows XP [desktop apps only]|
|Minimum supported server||Windows Server 2003 [desktop apps only]|
|Header||winbase.h (include Windows.h)|