Add scripts from testing usb sticks

analyze.py

@@ -0,0 +1,41 @@
+#!/usr/bin/env python3
+
+with open("./differences", "rb") as f:
+  blocks = 0
+  errors = 0
+  error_bits = 0
+  good = 0
+  max_good = 0
+#  failure_map = []
+#  failures = 0
+  b = f.read(512)
+  while len(b) == 512:
+    blocks += 1
+#    failures *= 2
+    if b != 512 * b'\0':
+      errors += 1
+      good = 0
+#      for by in b:
+#        for bit in range(0, 8):
+#          if by & (1 << bit):
+#            error_bits += 1
+#      failures += 1
+#    if blocks % 8 == 0:
+#      failure_map += [failures]
+#      failures = 0
+    else:
+      good += 1
+      if good > max_good:
+        max_good = good
+        good_pos = blocks - good + 1
+    b = f.read(512)
+    if blocks % 100000 == 0:
+      print("I'm at " + str(blocks) + " blocks")
+  if len(b) != 0:
+    print("Unexpected length: " + str(len(b)))
+  print("Errors in " + str(errors) + " of " + str(blocks) + " blocks.")
+  percent = error_bits / errors / 512 / 8 * 100
+  print(str(percent) + " % der Bits in fehlerhaften Sektoren waren gekippt.")
+  print("Ab Sektor " + str(good_pos) + " sind " + str(max_good) + " zusammenhängende Sektoren fehlerfrei (größter Bereich).")
+#  with open("./failure_map", "wb") as f:
+#    f.write(bytes(failure_map))