commit c75e3e1268c82dc09a9ea3dfd030dbc51b31d7ec
Author: Lukas Fürderer <l.fuerderer@gmail.com>
Date:   Sat Apr 13 21:55:13 2019 +0200

    Add scripts from testing usb sticks

diff --git a/analyze.py b/analyze.py
new file mode 100755
index 0000000..577d43a
--- /dev/null
+++ b/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))
diff --git a/create-image.py b/create-image.py
new file mode 100755
index 0000000..b3c53b2
--- /dev/null
+++ b/create-image.py
@@ -0,0 +1,23 @@
+#!/usr/bin/env python3
+overhead = b"BM\xda'\xd0\x02"+4*b"\x00"+b"z"+3*b"\x00"+b"l"+3*b"\x00"+b"\xa0\x0f"+2*b"\x00"+b"]\x0f"+2*b"\x00"+b"\x01\x00\x18"+5*b"\x00"+b"`'\xd0\x02\x13\x0b"+2*b"\x00"+b"\x13\x0b"+10*b"\x00"+b"BGRs"+48*b"\x00"+b"\x02"+15*b"\x00"
+
+def getbit(filecontent, pos):
+  byte_pos = pos//8
+  bitpos = pos%8
+  if byte_pos >= len(filecontent):
+    return False
+  return (filecontent[byte_pos] & (1<<(7-bitpos))) != 0
+
+with open("./failure_map", "rb") as f:
+  map_file = f.read()
+  print("Soll: 1966080, Ist: " + str(len(map_file)))
+
+with open("./map.bmp", "wb") as f:
+  f.write(overhead)
+  for y in range(3932, -1, -1):
+    for x in range(0, 4000):
+      bitpos = y * 4000 + x
+      if getbit(map_file, bitpos):
+        f.write(3*b"\x00")
+      else:
+        f.write(3*b"\xff")