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FORUMS General Gear Talk Data Storage, Memory Cards & Backup
Thread started 22 May 2015 (Friday) 09:33
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Dependability of Sandisk 64gb Extreme Pro SDHC

 
Intheswamp
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Joined Sep 2013
South Alabama
May 22, 2015 09:33 |  #1

Anybody know about the dependability of the 64gb Sandisk Extreme Pro SDHC memory cards as compared to the 32gb cards?

Right now the larger cards are at a nice price, but should the dependability of the larger card be as good as the smaller one?

I'm shooting with a 6D so really don't need the speed but rather interested in dependability/data security.

Ed


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Kolor-Pikker
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Moscow
Post has been last edited over 2 years ago by Kolor-Pikker. 2 edits done in total.
May 22, 2015 13:16 |  #2

As far as I'm aware, rating the dependability of solid state media is kind of complex.

On one hand, the larger any flash media is, the longer it's service life, since each cell takes longer to get written to each time you fill up the card. If we assume a memory cell can be written to 1000 times before it fails, then a card with double the cells is twice as durable. On the other hand, with twice as many cells, you also have twice the chance of some of those cells failing. Not to mention the card stays the same size, so all those cells are getting crammed in there and it may count for something too.

To put it simply, a 64GB card will last longer than a 32GB card, but may have an increased chance of data corruption. Long-term total failure vs. short term local failure in other words.

I'm just theorizing here though, I have two 64GB cards by Lexar and Sandisk and both work fine after months of use, no problems at all.


5DmkII | 24-70 f/2.8L II | Pentax 645Z | 55/2.8 SDM | 120/4 Macro | 150/2.8 IF
I acquired an expensive camera so I can hang out in forums, annoy wedding photographers during formals and look down on P&S users... all the while telling people it's the photographer, not the camera.

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M_Six
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May 22, 2015 15:42 |  #3

I have a bunch of these cards and just bought 2 more of the 64GB versions from B&H. Never had one fail, but I'm not a heavy user like a wedding photographer might be. Still, I've filled and formatted the ones I have a dozen times or so each.


Mark J.
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Intheswamp
THREAD ­ STARTER
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Joined Sep 2013
South Alabama
May 22, 2015 19:35 |  #4

Well, I decided on the 64gb cards and went to order them...yep, BHP is closed. Ah well, what's three days, eh? :)

Thanks for the feedback,
Ed


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John ­ from ­ PA
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May 22, 2015 20:30 |  #5

Intheswamp wrote in post #17567319external link
Well, I decided on the 64gb cards and went to order them...yep, BHP is closed. Ah well, what's three days, eh? :)

Thanks for the feedback,
Ed

The Jewish holiday of Shavuos runs through Monday so they should reopen Tuesday.




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Intheswamp
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Joined Sep 2013
South Alabama
May 22, 2015 21:50 |  #6

Yes, I understand they are observing Shavuos. No rush on my part. :)

Ed


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Dependability of Sandisk 64gb Extreme Pro SDHC
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