The TAPE_SET_MEDIA_PARAMETERS structure describes the tape in the tape drive.
typedef struct _TAPE_SET_MEDIA_PARAMETERS { // tsmp
ULONG BlockSize;
} TAPE_SET_MEDIA_PARAMETERS;
There is no longer a requirement that block sizes be powers of 2.
Windows NT: Requires version 3.1 or later.
Windows: Unsupported.
Windows CE: Unsupported.
Header: Declared in winnt.h.
Tape Backup Overview, Tape Backup Structures, GetTapeParameters, SetTapeParameters