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Old Aug 1, 2006, 8:35 AM   #1
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Just read a good article on the topic of fake flash cards


http://www.overclockers.com.au/wiki/Fake_Memory_Cards

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Old Nov 20, 2006, 3:14 AM   #2
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This was one of the most useful posts I have ever seen. I just bought a memory card off eBay at a good price and now I will know what to look for! thanks for the info!

And...I used to live in Gila Bend.
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Old Nov 21, 2006, 6:21 AM   #3
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You can sometimes* luck out with a 'genuine fake' though: I once read that a factory producing Memory Sticks for Sony was also producing extra 'fakes' on the side. Ie, Sony would order 1000 cards and pay the factory $2 a piece for them. The factory would manufacture 5000, and sell the rest to black marketeers at $10 a time :lol:

*although probably almost never
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Old Dec 21, 2006, 10:00 PM   #4
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I just checked my SD cards, and the one I bought from Best Buy, and the one I bought from an eBay vendor look the same, and according to the info on the site, they are both fake. I find it strange that Best Buy would have fake cards.

Later,

Andy
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Old Dec 22, 2006, 5:39 PM   #5
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I received a fake 1gb SanDisk Ultra II secure digital card from eBay. It was obvious that the card was fake by looking at the package. I ran SiSoftware Sandra on the card and received the following results.

Fake SanDisk

SiSoftware Sandra

Benchmark Results
Combined Index : 3242 operation(s)/min
Endurance Factor : 29.3
Results Interpretation : Higher index values are better.

Performance Test Status
Run ID : STEVEN on Friday, December 22, 2006 at 2:52:53 PM
System Timer : 3.6MHz

512B Files Test
Read Performance : 30978 operation(s)/min (258 kB/sec, 1x)
Write Performance : 1854 operation(s)/min (15 kB/sec, 0x)
Delete Performance : 3615 operation(s)/min
File Fragments : 2.0
Combined Index : 4788 operation(s)/min

32kB Files Test
Read Performance : 7497 operation(s)/min (3998 kB/sec, 26x)
Write Performance : 1415 operation(s)/min (755 kB/sec, 5x)
Delete Performance : 3738 operation(s)/min
File Fragments : 3.0
Combined Index : 3137 operation(s)/min

256kB Files Test
Read Performance : 1203 operation(s)/min (5133 kB/sec, 34x)
Write Performance : 381 operation(s)/min (1626 kB/sec, 10x)
Delete Performance : 3826 operation(s)/min
File Fragments : 3.0
Combined Index : 761 operation(s)/min

2MB Files Test
Read Performance : 154 operation(s)/min (5257 kB/sec, 35x)
Write Performance : 53 operation(s)/min (1809 kB/sec, 12x)
Delete Performance : 3754 operation(s)/min
File Fragments : 3.0
Combined Index : 105 operation(s)/min

64MB Files Test
Read Performance : 5 operation(s)/min (5461 kB/sec, 36x)
Write Performance : 2 operation(s)/min (2185 kB/sec, 14x)
Delete Performance : 1759 operation(s)/min
File Fragments : 5.0
Combined Index : 3 operation(s)/min

Endurance Test Status
Operating System Disk Cache Used : No
Use Overlapped I/O : No
Test File Size : 32MB
Block Size : 512 byte(s)
File Fragments : 1

Endurance Benchmark Breakdown
Repeated Sector ReWrite : 220 kB/s
Sequential Sector Write : 129 kB/s
Random Sector Write : 4 kB/s

Drive
Total Size : 952MB
Free Space : 952MB, 100%
Cluster Size : 16kB

Performance Tips
Notice 5901 : CD 1x= 150kB/s; Exercise caution when comparing measured versus published ratings.
Notice 5008 : To change benchmarks, click Options.
Notice 5004 : Synthetic benchmark. May not tally with 'real-life' performance.
Notice 5006 : Only compare the results with ones obtained using the same version!
Notice 5207 : Consider using the File System Benchmark for non-Flash devices.
Notice 5900 : Endurance factor can only be used on the same type of device (SLC or MLC).
Tip 11 : Use the 'Switch Chart Type' button to switch between Detailed and Combined charts.
Tip 2 : Double-click tip or press Enter while a tip is selected for more information about the tip.

Regular 512mb Kingston

SiSoftware Sandra

Benchmark Results
Combined Index : 944 operation(s)/min
Endurance Factor : 8.3
Results Interpretation : Higher index values are better.

Performance Test Status
Run ID : STEVEN on Friday, December 22, 2006 at 3:20:07 PM
System Timer : 3.6MHz

512B Files Test
Read Performance : 32832 operation(s)/min (274 kB/sec, 1x)
Write Performance : 334 operation(s)/min (2850 bytes/sec)
Delete Performance : 957 operation(s)/min
File Fragments : 1.0
Combined Index : 981 operation(s)/min

32kB Files Test
Read Performance : 8357 operation(s)/min (4457 kB/sec, 29x)
Write Performance : 469 operation(s)/min (250 kB/sec, 1x)
Delete Performance : 954 operation(s)/min
File Fragments : 1.0
Combined Index : 1225 operation(s)/min

256kB Files Test
Read Performance : 1272 operation(s)/min (5427 kB/sec, 36x)
Write Performance : 315 operation(s)/min (1344 kB/sec, 8x)
Delete Performance : 955 operation(s)/min
File Fragments : 1.0
Combined Index : 654 operation(s)/min

2MB Files Test
Read Performance : 162 operation(s)/min (5530 kB/sec, 36x)
Write Performance : 76 operation(s)/min (2594 kB/sec, 17x)
Delete Performance : 947 operation(s)/min
File Fragments : 1.0
Combined Index : 129 operation(s)/min

64MB Files Test
Read Performance : 5 operation(s)/min (5461 kB/sec, 36x)
Write Performance : 3 operation(s)/min (3277 kB/sec, 21x)
Delete Performance : 894 operation(s)/min
File Fragments : 1.0
Combined Index : 4 operation(s)/min

Endurance Test Status
Operating System Disk Cache Used : No
Use Overlapped I/O : No
Test File Size : 32MB
Block Size : 512 byte(s)
File Fragments : 1

Endurance Benchmark Breakdown
Repeated Sector ReWrite : 192 kB/s
Sequential Sector Write : 190 kB/s
Random Sector Write : 16 kB/s

Drive
Total Size : 483MB
Free Space : 492MB, 102%
Cluster Size : 16kB

Performance Tips
Notice 5901 : CD 1x= 150kB/s; Exercise caution when comparing measured versus published ratings.
Notice 5008 : To change benchmarks, click Options.
Notice 5004 : Synthetic benchmark. May not tally with 'real-life' performance.
Notice 5006 : Only compare the results with ones obtained using the same version!
Notice 5207 : Consider using the File System Benchmark for non-Flash devices.
Notice 5900 : Endurance factor can only be used on the same type of device (SLC or MLC).
Tip 11 : Use the 'Switch Chart Type' button to switch between Detailed and Combined charts.
Tip 2 : Double-click tip or press Enter while a tip is selected for more information about the tip.

As you can see the results were awful from the test. Additionally I gave the card a "real-life" test by shooting in continuous mode with raw.







zzyzx409

There are 3 types of counterfeit SanDisk

" The first one is the SanDisk OEM which failed the QC process. The manufacturer in China dumps those cards in the market. The person complained in the website you posted bought this type of card.

The second one is the production overrun. The manufacturer re-sells those card in the local market. The performance of the card is the same as the genuine card.

The third type is the worst. It is not even from SanDisk manufacturer. The is the real fake card. The card will be corrupted very soon after the first usage. I had a friend who bought a 4GB card which failed after she dump a large file into it."
http://toroncolor.com/forum/viewtopi...d56573c37a4974
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Old Dec 22, 2006, 11:26 PM   #6
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I received a SanDisk 1GB Extreme III card today. I looks OK, but who knows. It even came in a package with one of those SanDisk zipper cases for carrying extra SD cards. Fake or not, I just can't tell.

I did some more testing on the SD standard ans the SD Extreme III. I copied about 950 MB of jpeg files to and from the cards a couple of times and the copy seemed to go without error.

I then decided to copy some large Quicktime video files, I had some 360 MB files, so I copied two of them to each card. I was even able to play the video from the card and it seemed OK. I did this a couple of times, copying the file to the card, playing and deleting, then copying and playing and deleting again.

Both cards seem OK. If the cards turn out to be unreliable, I do not want to use them and I will just chalk the experience up to looking for the elusive "free lunch". Next time I will only purchase from a Brick and Morter store, even if I pay more.

Anyway, are there any other tests I can try to determine if the cards will indeed be usable, and reliable and dependable?

BTW: I'm using Mac OS X, so I can't do Windows only tests, any Mac OS X tests, or application tests using a card reader would be helpful.

Thanks,

Andy
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Old Dec 23, 2006, 8:56 AM   #7
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I'd just like to add that there is a ebay seller who is selling Sandisk 8GB Etreme III 150x speed compact flash cards that are FAKE!!!! A mate bought one and tha sticker fell off and also it was only 4GB and about 80x speed...So Folks just be aware there are lots of really orignal looking pics on there and the thing is those photos of the sellers items are real....But not what He or She sends out!!!!!

Caution!!!!
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Old Dec 23, 2006, 10:45 AM   #8
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2gb sandisk ultra II sd - fake as well ebay
got it almost a year ago, and have had no problems, except i recently realized that it is only 1gb!!!!!!!!!!!!!!
it is missing the notch at the bottom, and if it is supposed to have a recess for the sticker, it doesnt.

i read that great link to fake cards and noticed it had a link to pictures of "real" sandisk cards, but i also noticed the pic it gave shows a slightly different shape notch than the pic from the online sandisk catalog. ?
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Old Jan 14, 2007, 11:07 AM   #9
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Send to Sandisk serial # of the card. They'll answer if it fake of real.
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Old Jan 15, 2007, 4:19 PM   #10
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im sure SOME people on ebay sell the cards and them themselves not knowing that it was fake, but with people whole selling them should know... But hey, as long as it works right? and it works the way it was ment to...
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