Proper memory card speed testing?

[Mpegger]

I was testing a number of my newer SD cards, and then started testing those that I have laying around with Crystal Disk Mark to see what the cards are capable of. In Crystal Disk Mark, you can change some of the parameters on how the tests are performed (Queue Depth and # of Threads), so I started changing the parameters around to see how they affect the read/write speeds. Was kinda strange seeing some old Class 2 rated SD card writing a over 4 MBps, but then fail miserably with only 0.21 MBps with the stock test settings in Crystal Disk Mark.

This got me wondering alot about this though. Just what is a "correct" testing method to get an accurate representation of what a cards actual performance is? 1 Queue, 1 Thread? 2Q, 2T? More? Less? How do cameras write to a card in comparison to Queue and Thread counts? What test settings should I use that would give a good respresentation on how the card would actually perform?

 

[PupOnTech]

SD Card Reviews - Fastest Secure Digital Memory Cards - Camera Memory Speed Comparison & Performance tests for SD and CF cards

Reviews of SD Memory Cards comparisons, benchmark, speed tests using various digital cameras. Fastest Secure Digital cards.

www.cameramemoryspeed.com

 

[Mpegger]

https://www.cameramemoryspeed.com/reviews/sd-cards/

Good link there! Strange that it never came up in my searches when I was looking for SD card reviews.

Looking through some of the reviews, it seems like Q1T1 is the norm used for testing, but I needed to use large datasets instead of small. I was testing with datasets around the size of what my camera would write (32MB-64MB), but larger datasets (1-2GB or higher) is whats is normally used for testing.