The SetTapePosition sets the tape position on the specified device.
DWORD SetTapePosition(
HANDLE hDevice, |
// handle of open device |
DWORD dwPositionMethod, |
// type of positioning to perform |
DWORD dwPartition, |
// new tape partition |
DWORD dwOffsetLow, |
// low-order 32 bits of tape position |
DWORD dwOffsetHigh, |
// high-order 32 bits of tape position |
BOOL bImmediate |
// return after operation begins |
); |
Value |
Meaning |
TAPE_ABSOLUTE_BLOCK |
Moves the tape to the device-specific block address specified by the dwOffsetLow and dwOffsetHigh parameters. The dwPartition parameter is ignored. |
TAPE_LOGICAL_BLOCK |
Moves the tape to the block address specified by dwOffsetLow and dwOffsetHigh in the partition specified by dwPartition. |
TAPE_REWIND |
Moves the tape to the beginning of the current partition. The dwPartition, dwOffsetLow, and dwOffsetHigh parameters are ignored. |
TAPE_SPACE_END_OF_DATA |
Moves the tape to the end of the data on the partition specified by dwPartition. |
TAPE_SPACE_FILEMARKS |
Moves the tape forward (or backward) the number of filemarks specified by dwOffsetLow and dwOffsetHigh in the current partition. The dwPartition parameter is ignored. |
TAPE_SPACE_RELATIVE_BLOCKS |
Moves the tape forward (or backward) the number of blocks specified by dwOffsetLow and dwOffsetHigh in the current partition. The dwPartition parameter is ignored. |
TAPE_SPACE_SEQUENTIAL_FMKS |
Moves the tape forward (or backward) to the first occurrence of n filemarks in the current partition, where n is the number specified by dwOffsetLow and dwOffsetHigh. The dwPartition parameter is ignored. |
TAPE_SPACE_SEQUENTIAL_SMKS |
Moves the tape forward (or backward) to the first occurrence of n setmarks in the current partition, where n is the number specified by dwOffsetLow and dwOffsetHigh. The dwPartition parameter is ignored. |
TAPE_SPACE_SETMARKS |
Moves the tape forward (or backward) the number of setmarks specified by dwOffsetLow and dwOffsetHigh in the current partition. The dwPartition parameter is ignored. |
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 |
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. |
If the offset specified by dwOffsetLow and dwOffsetHigh specifies the number of blocks, filemarks, or setmarks to move, a positive offset moves the tape forward to the end of the last block, filemark, or setmark. A negative offset moves the tape backward to the beginning of the last block, filemark, or setmark. If the offset is zero, the tape does not move.
To obtain information about the status, capabilities, and capacities of tape drives and media, call the GetTapeParameters function.
CreateFile, GetTapeParameters, GetTapePosition
file: /Techref/os/win/api/win32/func/src/f82_11.htm, 11KB, , updated: 2000/4/7 12:19, local time: 2024/8/16 10:10,
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