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Overview |
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Group |
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Quick Info
Windows NT
| Yes
| Win95
| No
| Win32s
| No
| Import Library
| kernel32.lib
| Header File
| winbase.h
| Unicode
| No
| Platform Notes
| None
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GetTapeParameters
The GetTapeParameters function retrieves information that describes the tape or the tape drive.
DWORD GetTapeParameters(
HANDLE hDevice,
| // handle of open device
| DWORD dwOperation,
| // type of information requested
| LPDWORD lpdwSize,
| // address of returned information
| LPVOID lpTapeInformation
| // tape media or drive information
| );
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Parameters
hDevice
Identifies the device about which information is sought. This handle is
created by using the CreateFile function.
dwOperation
Specifies the type of information requested. This parameter must be one of the
following values:
Value
| Description
| GET_TAPE_MEDIA_INFORMATION
| Retrieves information about the tape in the tape device.
| GET_TAPE_DRIVE_INFORMATION
| Retrieves information about the tape device.
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lpdwSize
Points 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.
lpTapeInformation
Points 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.
Return Values
If the function succeeds, the return value is NO_ERROR.
If the function fails, the return value is one of the following error codes:
Error code
| Description
| ERROR_BEGINNING_OF_MEDIA
| An attempt to access data before the beginning-of-medium marker failed.
| ERROR_BUS_RESET
| A reset condition was detected on the bus.
| ERROR_END_OF_MEDIA
| The end-of-tape marker was reached during an operation.
| ERROR_FILEMARK_DETECTED
| A filemark was reached during an operation.
| ERROR_SETMARK_DETECTED
| A setmark was reached during an operation.
| ERROR_NO_DATA_DETECTED
| The end-of-data marker was reached during an operation.
| ERROR_PARTITION_FAILURE
| The tape could not be partitioned.
| ERROR_INVALID_BLOCK_LENGTH
| The block size is incorrect on a new tape in a multivolume partition.
| ERROR_DEVICE_NOT_PARTITIONED
| The partition information could not be found when a tape was being loaded.
| ERROR_MEDIA_CHANGED
| The tape that was in the drive has been replaced or removed.
| ERROR_NO_MEDIA_IN_DRIVE
| There is no media in the drive.
| ERROR_NOT_SUPPORTED
| The tape driver does not support a requested function.
| ERROR_UNABLE_TO_LOCK_MEDIA
| An attempt to lock the ejection mechanism failed.
| ERROR_UNABLE_TO_UNLOAD_MEDIA
| An attempt to unload the tape failed.
| ERROR_WRITE_PROTECT
| The media is write protected.
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Remarks
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.
See Also
CreateFile, SetTapeParameters, TAPE_GET_DRIVE_PARAMETERS, TAPE_GET_MEDIA_PARAMETERS
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