@echo off
if "%1" == "" (
  echo Usage: test.cmd filename
  goto end
)
if not exist %1 (
  echo File not exist %1
  goto end
)
echo copy %1
copy %1 test_1.bin
copy %1 test_2.bin
echo start
testio test.bin 256 1 1000000000
echo check result
fc /b test_1.bin test_2.bin
del test_1.bin
del test_2.bin
:end
pause

#include <stdlib.h>
#include <stdio.h>
#include <time.h>
#include <windows.h>

///////////////////////////////////////////
void filemove_m_Sla(char* fname, long long start, long long shift, long long len)
{
    HANDLE f_read  = CreateFile(fname, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
    HANDLE f_write = CreateFile(fname, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);

    if( f_read == INVALID_HANDLE_VALUE || f_write == INVALID_HANDLE_VALUE )
    {
        printf("open file %s error %d\n", fname, GetLastError());
        return;
    }

    const int  bufSize = 1024*1024;
    char buf[bufSize];

    LARGE_INTEGER temp;
    bool res_bool;
    temp.QuadPart = start;
    res_bool = SetFilePointerEx(f_read, temp, NULL, FILE_BEGIN);
    temp.QuadPart = start - shift;
    res_bool = SetFilePointerEx(f_write, temp, NULL, FILE_BEGIN);
    while (len > 0)
    {
        int bs = bufSize < len ? bufSize : len;
        DWORD res;
        res_bool = ReadFile( f_read, buf, bs, &res, NULL );
        res_bool = WriteFile( f_write, buf, bs, &res, NULL);
        len -= bufSize;
    }
    CloseHandle(f_read);
    CloseHandle(f_write);
}
///////////////////////////////////////////
void filemoveDimaT(char* fname, long long start, long long shift, long long len)
{
    HANDLE f = CreateFile(fname, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
    if( f == INVALID_HANDLE_VALUE)
    {
        printf("open file %s error %d\n", fname, GetLastError());
        return;
    }
    unsigned int size = SetFilePointer(f, 0, 0, FILE_END);
    SetFilePointer(f, 0, 0, FILE_BEGIN);

    HANDLE fm = CreateFileMapping(f, NULL, PAGE_READWRITE, 0, size, NULL);
    if(!fm)
    {
        printf("error %d CreateFileMapping()\n", GetLastError());
        CloseHandle(f);
        return;
    }

    char* mem = (char*) MapViewOfFile(fm, FILE_MAP_WRITE, 0, 0, size);
    if(!mem)
    {
        printf("error %d MapViewOfFile()\n", GetLastError());
    }
    else
    {
        memmove(mem + start - shift, mem + start, len);
        UnmapViewOfFile((void*) mem);
    }
    CloseHandle(fm);
    CloseHandle(f);
}
///////////////////////////////////////////
int main(int argc,char **argv)
{
    if (argc< 5)
    {
        fprintf(stderr,"\n\nUsage: testio <filename> <start> <shift> <lenght>\n");
        return -1;
    }
    int s = clock();
    filemoveDimaT( "test_1.bin", atoi(argv[2]), atoi(argv[3]), atoi(argv[4]));
    fprintf(stderr, "Dima T: %d ms\n", clock() - s);
    s = clock();
    filemove_m_Sla("test_2.bin", atoi(argv[2]), atoi(argv[3]), atoi(argv[4]));
    fprintf(stderr, "m_Sla: %d ms\n", clock() - s);

}
///////////////////////////////////////////

файл test.txt - 1,69 ГБ (1 825 243 136 байт)

ssd
D:\Test_io>test test.txt
copy test.txt
Скопировано файлов:         1.
Скопировано файлов:         1.
start
Dima T: 7480 ms
m_Sla: 11023 ms
check result
Сравнение файлов test_1.bin и TEST_2.BIN
FC: различия не найдены

hdd
F:\Test_io>test test.txt
copy test.txt
Скопировано файлов:         1.
Скопировано файлов:         1.
start
Dima T: 22203 ms
m_Sla: 44265 ms
check result
Сравнение файлов test_1.bin и TEST_2.BIN
FC: различия не найдены