Quite a lot has happened; I lose track

assert_dd_blocks.py

@@ -0,0 +1,62 @@
+MBR_LBA_GAP = 0x3f
+BOOT_PARITION_SIZE = 0x300B85
+RECOVER_PARTITION_SIZE = 0x300BC4
+partitions = [
+    0x102d83,
+    0x403947,
+    0x403947,
+    0x48ed459,
+    0x20014aa,
+]
+
+
+ext_offset = 0
+offsets = [0] * len(partitions)
+extended_base = MBR_LBA_GAP + BOOT_PARITION_SIZE + RECOVER_PARTITION_SIZE
+for i in range(len(partitions)):
+    offsets[i] = ext_offset + extended_base
+    ext_offset += partitions[i] + MBR_LBA_GAP
+
+# (Start, end, data)
+accounted_for = [
+    (0, 1, True),  # MBR
+    (1, MBR_LBA_GAP, False),
+    (MBR_LBA_GAP, MBR_LBA_GAP + BOOT_PARITION_SIZE, True),
+    (MBR_LBA_GAP + BOOT_PARITION_SIZE, MBR_LBA_GAP + BOOT_PARITION_SIZE + RECOVER_PARTITION_SIZE, True),
+]
+
+for n, (i, j) in enumerate(zip(offsets, partitions)):
+    accounted_for.append((
+        i, i + 1, True
+    ))
+    if n == 0:
+        # SBR
+        accounted_for.append((
+            i + 1, i + 4, True
+        ))
+        accounted_for.append((
+            i + 4, i + MBR_LBA_GAP, False
+        ))
+    else:
+        accounted_for.append((
+            i + 1, i + MBR_LBA_GAP, False
+        ))
+    accounted_for.append((
+        i + MBR_LBA_GAP, i + MBR_LBA_GAP + j, True
+    ))
+
+assert accounted_for[-1][1] == 0x77fa1d7
+last = 0
+for i in accounted_for:
+    assert i[0] == last
+    last = i[1]
+
+with open(r"G:\finale_dd\finale_dd.img", "rb") as finale_dd:
+    for i in accounted_for:
+        if i[2]:
+            continue
+        nbytes = i[1] - i[0]
+        finale_dd.seek(i[0] * 512)
+        print(f"Checking at {i[0] * 512:012x}-{i[1] * 512:012x}")
+        if any(finale_dd.read(nbytes * 512)):
+            print("!! FAIL")