CompactFlash Card Speed Testing at DVinfo.net

Go Back   DV Info Net > The Tools of DV and HD Production > External Video Recording Solutions > Convergent Design Odyssey

Convergent Design Odyssey
...and other Convergent Design products.


Reply
 
Thread Tools Search this Thread
Old September 19th, 2011, 07:19 AM   #1
Inner Circle
 
Join Date: Dec 2002
Location: Augusta Georgia
Posts: 5,413
CompactFlash Card Speed Testing

Dear Friends,

We have a CompactFlash Card Speed Test built into the nanoFlash.

This is in version 1.6.248, and every version since 1.6.226.

This is very easy to use:

1. Set up System|Trigger to "Record Button"

2. Set up Video|Bit Rate and Codec to the speed and codec you wish to use for the test.

3. Insert the card, then format it in the nanoFlash.

4. Supply a video signal to the nanoFlash, HD-SDI or HDMI.

5. To start the test:

a. Press and Hold the Left Arrow Button.
b. Press the Record Button.
c. Release both buttons.

The nanoFlash will start to record, and it will display a new line of info near the top of the screen.

On the left will be 0%, on the right will be 100%

There will be, starting out, a very thin sliver, near the 0%.

As recording progresses, this sliver will get wider at times, turning into a bar like a progress bar.

With a card that is fast enough, the wider bar will go back to the sliver (it will get very thin again).

If a card that is marginal, the bar may get quite wide, but not reach the 100% level before the card is full.

If the card is too slow, the bar will go all of the way to 100% before the card is full.


This feature allows one to see, the relative amount of data that we have in our First-In, First-Out Buffer.

If this buffer does not get to 100%, before the card is full, then the card is usable at that bit-rate.

Ideally, the card should be even faster, so that the First-In, First Out Buffer is almost empty most of the time. This indicates that the card is fast enough, and has an extra margin of speed.



Regretfully, there are a lot of counterfeit cards, especially SanDisk cards and a few other brands have been counterfeited, but this is very rare.

We always recommend purchasing your CompactFlash cards from reputable sources.

This test will allow you to test if your cards are up to speed or not, for any given bit-rate.

In general, we do recommend that you stay within the guidelines that we have established for various cards that we have qualified. Here is a link to our Media page:

Media for nanoFlash | Convergent Design
__________________
Dan Keaton
Augusta Georgia
Dan Keaton is offline   Reply With Quote
Old April 9th, 2012, 05:12 PM   #2
New Boot
 
Join Date: Jul 2009
Location: Cardiff Wales
Posts: 17
Re: CompactFlash Card Speed Testing

Dan,

Is there a similar speed test available in the XDR?

Currently at firmware 1.5.91

I tried the same method but it did not work.

Brian
Brian Crow is offline   Reply With Quote
Old April 11th, 2012, 11:19 AM   #3
Inner Circle
 
Join Date: Dec 2002
Location: Augusta Georgia
Posts: 5,413
Re: CompactFlash Card Speed Testing

Dear Brian,

I have not checked, but I feel that we do not have this feature in the Flash XDR at this time.
__________________
Dan Keaton
Augusta Georgia
Dan Keaton is offline   Reply With Quote
Old April 17th, 2012, 12:03 PM   #4
Inner Circle
 
Join Date: Jun 2003
Location: San Jose, CA
Posts: 2,222
Re: CompactFlash Card Speed Testing

Thanks, Dan . Is there a way to distinguish the real and counterfeit SanDisk cards? Markings? Speed? Also, can we be assured of a proper SanDisk card from a reputable dealer such as BH Photo?
Gints Klimanis is offline   Reply With Quote
Old April 23rd, 2012, 07:34 AM   #5
Inner Circle
 
Join Date: Dec 2002
Location: Augusta Georgia
Posts: 5,413
Re: CompactFlash Card Speed Testing

Dear Gints,

I am sorry, but I do not have any information on how to detect counterfeit SanDisk cards. eBay had an article about this, but this is a moving target, so no article will be definitive.

I always recommend purchasing CompactFlash cards from a reputable source, and B&H is certainly one of the most reputable sources.
__________________
Dan Keaton
Augusta Georgia
Dan Keaton is offline   Reply With Quote
Old April 23rd, 2012, 08:06 PM   #6
Regular Crew
 
Join Date: Mar 2008
Location: Palm Harbor, Florida
Posts: 102
Re: CompactFlash Card Speed Testing

I did a search on Google for counterfeit cards. It had several photos showing a comparison of legit and fake cards. I was able to determine the cards I bought on ebay were counterfeit and got a refund. I'll never buy cards on ebay again. Lesson learned.
Michael Sims is offline   Reply With Quote
Old April 23rd, 2012, 08:12 PM   #7
Inner Circle
 
Join Date: Dec 2002
Location: Augusta Georgia
Posts: 5,413
Re: CompactFlash Card Speed Testing

Dear Michael,

Thank you for sharing your experience.

Your post will help more than anything I could ever post.
__________________
Dan Keaton
Augusta Georgia
Dan Keaton is offline   Reply With Quote
Old April 24th, 2012, 01:45 PM   #8
Regular Crew
 
Join Date: Mar 2008
Location: Palm Harbor, Florida
Posts: 102
Re: CompactFlash Card Speed Testing

Happy to help so no one else has to go the the irritation I had to endure with the counterfeit cards. It took me over a month to get my refund. I was surprised I actually got it finally. I was sure the money was gone.

Also, Dan, it was a pleasure to meet you at NAB and say thank you in person for all your help on this forum. My Nanoflash is a key component of my production gear.
Michael Sims is offline   Reply With Quote
Old April 24th, 2012, 02:03 PM   #9
Inner Circle
 
Join Date: Dec 2002
Location: Augusta Georgia
Posts: 5,413
Re: CompactFlash Card Speed Testing

Dear Michael,

Thank you for the nice words.

It is especially nice to hear that you got your memory back.
__________________
Dan Keaton
Augusta Georgia
Dan Keaton is offline   Reply
Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

Professional Video
(800) 833-4801
Portland, OR

B&H Photo Video
(866) 521-7381
New York, NY

Z.G.C.
(973) 335-4460
Mountain Lakes, NJ

Abel Cine Tech
(888) 700-4416
N.Y. NY & L.A. CA

Precision Camera
(800) 677-1023
Austin, TX

DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > The Tools of DV and HD Production > External Video Recording Solutions > Convergent Design Odyssey

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 11:18 AM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2017 The Digital Video Information Network