VOID FASTCALL HalExamineMBR( IN PDEVICE_OBJECT DeviceObject, IN ULONG SectorSize, IN ULONG MBRTypeIdentifier, OUT PVOID *Buffer ); Routine Description: Given a master boot record type (MBR - the zero'th sector on the disk), read the master boot record of a disk. If the MBR is found to be of that type, allocate a structure whose layout is dependant upon that partition type, fill with the appropriate values, and return a pointer to that buffer in the output parameter. The best example for a use of this routine is to support Ontrack systems DiskManager software. Ontrack software lays down a special partition describing the entire drive. The special partition type (0x54) will be recognized and a couple of longwords of data will be passed back in a buffer for a disk driver to act upon. Arguments: DeviceObject - The device object describing the entire drive. SectorSize - The minimum number of bytes that an IO operation can fetch. MBRIndentifier - A value that will be searched for in the in the MBR. This routine will understand the semantics implied by this value. Buffer - Pointer to a buffer that returns data according to the type of MBR searched for. If the MBR is not of the type asked for, the buffer will not be allocated and this pointer will be NULL. It is the responsibility of the caller of HalExamineMBR to deallocate the buffer. The caller should deallocate the memory ASAP. Return Value: None.