No he right with the 50D , The clue is the "Tragic Lantern" Search it

Ok back on topic , I did a more comprehensive test with MLV Lite module on my 5D2 with the updated raw_rec.mo
I use the latest Nightly Build plus I compared mlv lite to full mlv ( use 2 different nighty for full MLV , feb15/2014 &Feb13/2016) and used the Old Raw format for Oct24/2013.
All tests done on CF Lexar 32GB 1066x
MLV Lite:1856x1004 @ 23.976 with GD (global draw) enabled - 1134 Frames
1856x1004 @ 23.976 with GD disabled - continuous until full (74.5MB/s write speed)
1856x1004 @ 23.976 with GD disabled + HDMI enabled (Ninja HDMI Hard Drive recorder connected) - 3215 Frames
1856x1044 @ 23.976 With GD enabled - 1089 Frames
1856x1044 @ 23.976 With GD disabled - 1662 Frames
3x Crop mode:1920x1038 @ 23.976 with GD enabled - 1046 Frames (76.9 MB/s Write Speed)
1920x1038 @ 23.976 With GD disabled - 2354 Frames
1920x1076 @ 23.976 With GD enabled - 724 Frames
2048x930 @ 23.976 With GD disabled - continuous until full (74.8 MB/s Write speed)
2048x1024 @23.976 With GD disabled - 1016 Frames
Full MLV (Feb13/2016 Nightly build):1856x1004 @ 23.976 + audio With GD enabled fill rate "0" - 1317 Frames
1856x928 @ 23.976 + audio With GD enabled fill rate "0" + HDMI enabled (Ninja HDMI Hard Drive recorder connected) - 2776 Frames
1856x928 @ 23.976 + audio With GD enabled fill rate "0" - continuous until full
Full MLV (Feb15/2014 Nightly build) : This is build I use 99% of the time for work ( Yea multiple of 16)
Work better on 5D mark 21856x928 @ 23.976 fill rate "0" + audio - continuous until full
1856x928 @ 23.976 fill rate "0" + audio (
GD disables automatically on recording raw video) + HDMI enabled (Ninja HDMI Hard Drive recorder connected) - continuous until full
1856x1004 @ 23.976 fill rate "0" + audio - 1788 Frames
1856x1044 @ 23.976 fill rate"0" + audio - 748 Frames
1872x936 @ 23.976 fill rate "0" + audio - continuous until full
1872x936 @ 23.976 + audio fill rate "0" + HDMI enabled (Ninja HDMI Hard Drive recorder connected) - continuous until full
3xCrop Mode:2048x872 @ 23.976 + audio fill rate "0" continuous until full
Raw Format .raw (Old Raw) **Note**
GD is automatically disabled while Raw video records 1856x1004 @23.976 + HDMI enabled (Ninja HDMI Hard Drive recorder connected) (74.6MB/s Write speed ) - continuous until full
1856x1044 @ 23.976 (77.5MB/s Write speed) - continuous until full
1872x1012 @ 23.976 (76 MB/s write Speed) - continuous until full
1872x1054 @ 23.976 (78MB/s write speed) - 2492 Frames
1872x1248 @ 23.976 (94MB/s write speed) - 265 Frames
1880x1016 @ 23.976 ( 76.6MB/s write speed) - continuous until full
1880x1058 @ 23.976 (78.4 MB/s write speed) - 2300 Frames
1880x1250 @ 23.976 ( 95MB/s write speed) - 246 Frames
3xCrop mode:1920x1038 @ 23.976 (79.7 MB/s write speed) - continuous until full
2048x930 @ 23.976 (79.4 MB/s write speed) - continuous until full
2048x1024 @ 23.976 (82.0 MB/s write speed) - 1534 Frames
2152x978 @ 23.976 (81.6MB/s Write speed) - 1220 Frames
Just for kicks I try a few @ 29.97 fps
1856x1004 @ 29.97 - 278 frames
1880x800 @29.97 (75MB/s write speed) - continuous until full

So it seems there a little bit of a bottle neck between MLV Lite & Old Raw
Well these are my finding.
Plus Spanning files work also , no problems so far extracting .