Changeset 105 for trunk/src/lbatest/readsect.c

Timestamp:

Jun 7, 2011, 5:31:33 PM (14 years ago)

Author:

Markus Thielen

Message:

changed readsect; buffer size can now be set on the command line

File:

• trunk/src/lbatest/readsect.c (modified) (6 diffs)

trunk/src/lbatest/readsect.c

@@ -40 +40 @@
 
 #define SECTOR_SIZE        512
-#define SECTORS_PER_READ   200
+#define SECTORS_PER_READ   4
 
 
@@ -53 +53 @@
 
 /*--- global data -----------------------------------------------------------*/
+
+unsigned long sectors_per_read = SECTORS_PER_READ;
 
 
@@ -98 +100 @@
     }
   }
+
+  if (argc > 4) {
+    sectors_per_read = (unsigned long) atoi(argv[4]);
+    if (sectors_per_read == 0) {
+      sectors_per_read = SECTORS_PER_READ;
+    }
+  }
+
+  printf("\nreadsect started; using %d sectors per read\n", 
+         (int) sectors_per_read);
 
   /* go */
@@ -124 +136 @@
   unsigned long sectors_read = 0;
 
-  buf = calloc(SECTOR_SIZE, SECTORS_PER_READ);
+  buf = calloc(SECTOR_SIZE, sectors_per_read);
 
   /* open drive */
@@ -141 +153 @@
   while (sectors_read < sectors_to_read) {
 
-    sectors_take = min(sectors_to_read - sectors_read, SECTORS_PER_READ);
+    sectors_take = min(sectors_to_read - sectors_read, sectors_per_read);
     cb_take = SECTOR_SIZE * sectors_take;
 
@@ -187 +199 @@
          "physical drive)\n\n"
          "Usage:\n\n"
-         "lbatest <drive letter|drive number> <number of sectors to read> "
-         "<output file>\n\n");
+         "lbatest <drive letter|number> <number of sectors> <outfile> [buffer size]\n\n"
+         "where:\n"
+         "drive letter         drive letter of logical drive to read from\n"
+         "drive number         1-based physical disk number to read from\n"
+         "number of sectors    number of sectors to read (e.g. 1024)\n"
+         "outfile              path and filename of output file\n"
+         "buffer size          buffer size in number of sectors (512 byte)\n"
+         "                      (default is %d sectors)\n",
+         SECTORS_PER_READ);
 }