--- seeker.c	2007-12-18 02:38:33.000000000 +0100
+++ seekerNat.c	2007-12-18 02:38:27.000000000 +0100
@@ -16,6 +16,9 @@
 int count;
 time_t start;
 
+off64_t maxoffset=0;
+off64_t minoffset=249994674176000;
+
 void done()
 {
 	time_t end;
@@ -29,8 +32,8 @@
 	}
 
 	if (count) {
-	  printf(".\nResults: %d seeks/second, %.2f ms random access time\n",
-		 count / TIMEOUT, 1000.0 * TIMEOUT / count);
+	  printf(".\nResults: %d seeks/second, %.2f ms random access time (%lu < offsets < %lu)\n",
+		 count / TIMEOUT, 1000.0 * TIMEOUT / count, minoffset, maxoffset);
 	}
 	exit(EXIT_SUCCESS);
 }
@@ -47,12 +50,12 @@
 {
 	char buffer[BLOCKSIZE];
 	int fd, retval;
-	unsigned long numblocks;
+	unsigned long numblocks, numbytes;
 	off64_t offset;
 
 	setvbuf(stdout, NULL, _IONBF, 0);
 
-	printf("Seeker v2.0, 2007-01-15, "
+	printf("Seeker v2.0(Nat1), 2007-12-18, "
 	       "http://www.linuxinsight.com/how_fast_is_your_disk.html\n");
 
 	if (argc != 2) {
@@ -60,13 +63,14 @@
 		exit(EXIT_SUCCESS);
 	}
 
-	fd = open(argv[1], O_RDONLY);
+	fd = open(argv[1], O_RDONLY | O_LARGEFILE);
 	handle("open", fd < 0);
 
 	retval = ioctl(fd, BLKGETSIZE, &numblocks);
 	handle("ioctl", retval == -1);
-	printf("Benchmarking %s [%luMB], wait %d seconds",
-	       argv[1], numblocks / 2048, TIMEOUT);
+	numbytes=numblocks*BLOCKSIZE;
+	printf("Benchmarking %s [%lu blocks, %lu bytes, %lu GiB], wait %d seconds\n",
+	       argv[1], numblocks, numbytes, numbytes/1000000000L, TIMEOUT);
 
 	time(&start);
 	srand(start);
@@ -74,12 +78,21 @@
 	alarm(1);
 
 	for (;;) {
-		offset = (off64_t) numblocks * random() / RAND_MAX;
-		retval = lseek64(fd, BLOCKSIZE * offset, SEEK_SET);
+		offset = (off64_t) ( (unsigned long) numbytes * (random() / (RAND_MAX + 1.0) ));
+		//printf("DEBUG: go %lu\n", offset);
+		retval = lseek64(fd, offset, SEEK_SET);
 		handle("lseek64", retval == (off64_t) -1);
 		retval = read(fd, buffer, BLOCKSIZE);
 		handle("read", retval < 0);
 		count++;
+		if (offset>maxoffset)
+			{
+			maxoffset=offset;
+			}
+		else if(offset<minoffset)
+			{
+			minoffset=offset;
+			}
 	}
 	/* notreached */
 }