Ultra class 10 VERY SLOW

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1

My ultra class 10 32 GB card can not work with my Canon T2i when shooting a video. It always stops after 5-6 seconds.

Tested with h2testw. Turn out the write speed is only 5-6 MB/s. Reformating does not help.

Doesn’t class 10 means 10 MB/s in writing? This is cheating!

2

can you bechmark the card using ATTO disk benchmark and post the results?. it is a free benchmarking software. 

3

Transfer size 64k - 8192k, total length 64MB

Write speed ranging from 8131 to 10652, most in 8MB-9MB.

Read speed 1513 to 1601.

I am not sure how trustworthy this result is. What kind of device writes much faster than reads?

My new PNY card is on its way. Will post its result once received.

4

My PNY card works fine with my camera. H2testw result is 15.3MB wrie and 34.9 MB read. ’

ATTO Bech32 gives me 14 MB write, 1.5 MB read.

So please, stop blaming card readers.