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Class 10 SD cards on HERO

Discussion in 'Android Devices' started by nmccallum, Oct 6, 2010.

  1. nmccallum

    nmccallum Member
    Thread Starter
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    Feb 23, 2010
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    I'm looking to upgrade my SD from a 8GB/class 4 to a 16GB card. Can anyone confirm that class 10 cards work in the Hero.

    From the quick searching I've done, it looks like people have only tried class 6...

    Cheers
     

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  2. Slug

    Slug Check six!
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    Class 10 (a) hasn't been commonly available until now and (b) has only recently been ratified by the SD Association. You may be trail-blazing on this one. ;)

    The only issue I can see is the requirement for Class 10 to use the "High Speed Bus I/F", as opposed to the "Normal Bus I/F" of Class 2/4/6. If the Hero's controller doesn't support the faster interface than my guess is that a Class 10 will function perfectly well but only achieve at best Class 6 performance.
     
    nmccallum likes this.
  3. nmccallum

    nmccallum Member
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    Feb 23, 2010
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    Nice one, thanks Slug. I'm gunna take the plunge regardless if it ends up acting as class 6.

    Can anyone suggest accurate ways of testing the speed once I grab this thing?
     
  4. smakme7757

    smakme7757 Well-Known Member
    16

    I swapped out the Class 2 2gb standard card for a Class 6 8gb card and don't notice any performance increase apart from the transfer speed between the PC and the Phone over USB.

    I've noticed a few Class 10 becoming available now i'd be interested in hearing how it goes :)
     
  5. nmccallum

    nmccallum Member
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    Feb 23, 2010
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    I got my card on Friday and ran some tests that I posted here. Comparing my results to the others in the thread would be inaccurate as its a Samsung thread, but just between the two cards I tested the results were pretty clear:

    The Hero's bus supports Class 10 cards!

    Going from a Class 4 8GB to a Class 10 16GB, write speeds increased by slightly >100%, and read speeds by roughly 30%.

    I'm sort of at odds about the read speeds, I was hoping to see better results, as I assume that would have the most effect on phone responsiveness. Unfortunately I haven't come across a good way to measure that...

    Any way, Class 10 cards are a thumbs up!
     
  6. daveybaby

    daveybaby Well-Known Member
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    Sep 21, 2009
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    Frankly i'm surprised that you saw such a big increase in read speeds - the class of a card only defines its write speeds, which are slow for flash memory - historically read speeds have been so fast regardless of class that nobody has bothered to classify them.
     
  7. nmccallum

    nmccallum Member
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    Feb 23, 2010
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    Yeah I thought it a bit hinky that I jumped from 9MB/sec reads to 13MB/sec reads when others using class 4 and even class 2 cards were pulling at speeds of 13-15MB/sec. I'll have to investigate it further.
     
  8. shilent

    shilent Member
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    Oct 5, 2010
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    I seem to be getting really slow write speeds on my Patriot 4GB class 10 micro SD card. When transferring like a 700MB file, I'm only getting about 2.2 MB/s write speed. With my stock SD card I'm getting over 5 MB/s. Same results with benchmarking programs.

    nmccallum, could you try transferring a large file to your phone and post results?
     
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