Platform SDK: Files and I/O |
The GetTapePosition function retrieves the current address of the tape, in logical or absolute blocks.
DWORD GetTapePosition( HANDLE hDevice, // handle to device DWORD dwPositionType, // address type LPDWORD lpdwPartition, // current tape partition LPDWORD lpdwOffsetLow, // low-order bits of position LPDWORD lpdwOffsetHigh // high-order bits of position );
Value | Description |
---|---|
TAPE_ABSOLUTE_POSITION | The lpdwOffsetLow and lpdwOffsetHigh parameters receive the device-specific block address. The dwPartition parameter receives zero. |
TAPE_LOGICAL_POSITION | The lpdwOffsetLow and lpdwOffsetHigh parameters receive the logical block address. The dwPartition parameter receives the logical tape partition. |
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. |
A logical block address is relative to a partition. The first logical block address on each partition is zero.
Call the GetTapeParameters function to obtain information about the status, capabilities, and capacities of tape drives and media.
Windows NT/2000: Requires Windows NT 3.1 or later.
Header: Declared in Winbase.h; include Windows.h.
Library: Use Kernel32.lib.
Tape Backup Overview, Tape Backup Functions, CreateFile, GetTapeParameters, SetTapePosition