Author Topic: My first SD benchmark  (Read 3771 times)

dilby

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My first SD benchmark
« on: July 01, 2014, 06:02:16 PM »
Hi all -

I'm currently running a t3i with nighty build 600D.102 and I'm trying RAW for the first time. Unfortunately I get 'Early stop. Didn't make it to estimated record time' when recording at any decent size, and I've tried disabling global draws and audio but still to no avail.

My SD card was bought based on a recommendation on this forum, and is a Lexar Proessional 32gb 400X class 10.

I wanted to do my own benchmark of the card though to try and pinpoint the issue, but it's my first time doing a test, so I was hoping someone could shed some light on the figures it has generated and also if I need to do the test another way.

I used AJA system test:

Video Frame Size: 1280x720 10-bit
File size: 128mb file size


         I/O Transactions
  Frame     MB/sec
           Read      Write     
00.0      62.9      1.1     
01.0      63.6      33.1     
02.0      57.7      36.1     
03.0      63.4      37.3     
04.0      63.7      42.3     
05.0      69.3      31.7     
06.0      70.2      39.5     
07.0      69.8      38.0     
08.0      70.2      38.7     
09.0      69.7      38.6     
10.0      69.7      39.5     
11.0      70.1      34.3     
12.0      69.2      38.9     
13.0      69.4      38.6     
14.0      69.8      39.4     
15.0      69.8      37.9     
16.0      69.7      38.6     
17.0      69.8      38.7     
18.0      70.0      35.8     
19.0      69.6      37.9     
20.0      69.3      38.8     
21.0      69.5      38.6     
22.0      69.9      39.5     
23.0      70.3      38.0     
24.0      70.0      38.9     
25.0      65.1      34.8     
26.0      63.8      39.5     
27.0      63.5      36.6     
28.0      63.9      35.8     
29.0      63.9      35.8     
30.0      64.0      39.6     
31.0      63.2      39.6     
32.0      63.4      34.0     
33.0      63.1      34.5     
34.0      63.6      37.9     
35.0      63.5      40.5     
36.0      63.8      41.4     
37.0      63.6      40.4     
38.0      65.0      36.8     
39.0      69.8      33.6     
40.0      69.7      39.7     
41.0      69.5      37.9     
42.0      69.5      38.8     
43.0      70.0      38.7     
44.0      69.7      39.7     
45.0      70.7      35.0     
46.0      70.3      38.8     
47.0      69.9      38.7     
48.0      70.0      39.4     
49.0      70.6      38.0     
50.0      71.2      38.8     
51.0      70.0      38.9     
52.0      63.2      30.8     



How are these results?

Thanks!

nick.p

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Re: My first SD benchmark
« Reply #1 on: July 02, 2014, 04:05:54 AM »
Better than what the camera can write so you are all good

ItsMeLenny

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dilby

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Re: My first SD benchmark
« Reply #3 on: July 02, 2014, 09:51:52 AM »
Ok great, thanks guys, and thanks ItsMeLenny, that's a useful graph. Any suggestions as to why I'd be getting such an error then?

ItsMeLenny

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Re: My first SD benchmark
« Reply #4 on: July 02, 2014, 05:02:54 PM »
Ok great, thanks guys, and thanks ItsMeLenny, that's a useful graph. Any suggestions as to why I'd be getting such an error then?

Because your camera can't keep up with the frame size + rate.
When you select your resolution + aspect, in the ML menu down the bottom of the screen it will say something like:
whatever width x whatever height equals this many MB/s.
And if that MB/s is over what your camera can write at then the length of your video will only be that what can be stored in camera memory, which isn't much.