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Are The Samsung 840 Pro Models Defective?

post #1 of 6
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I have been reading around lately and noticing a larger trend of people saying the Samsung 840 pros might have some hardware related issues that are causing them to fail. I was wondering if anyone currently owns one of these drives and has done any extensive testing on them to try and replicate the drive failures?

Here are some threads that are talking about the drive failures:

http://forums.anandtech.com/showthread.php?t=2282016&page=4
http://hardforum.com/showpost.php?p=1039315534&postcount=34

Would love to hear some feedback from anyone.

-Mike
Edited by Twisterman - 11/13/12 at 6:15pm
    
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post #2 of 6
Quote:
That argument, while strictly true, is completely useless.

In the real world, we know that products often do have defects, and both consumers and manufacturers would like to have the defects fixed.

So a more useful question is how do defects get fixed after a product has already undergone its initial validation testing, and some units have passed production testing and been released into the field?

A common answer is that units that fail in the field can be carefully analyzed to determine the cause of failure, and if a widespread or serious failure mode is recognized, then the search for a remedy begins.

Also, it is interesting to try to frame your specious argument quantitatively, to try to make it actually worth something. So, note that a failure rate of about 0.5% per year is commonly considered very good for SSDs (Intel and Plextor have claimed to have failure rates of about 0.5% per year).

If the failures of the two 840 Pro SSDs at anandtech were random and independent (uncorrelated) and the chance of failure of each is less than 0.5% (technically, significantly less since they failed in less than a week each, but for argument sake I will skip that complication), then the probability that two out of two failed is longer than 1 in 40,000. That already makes any reasonable person question our initial assumption of random and independent failures. Add to that the observation that the two SSDs failed with similar symptoms and after running similar workloads, and it looks even more likely that the two failures were correlated in some manner.

So, if the failures were correlated, what can we conclude? Still nothing definite, since it is possible that the two SSDs were both exposed to some stress outside of their specification that caused them to fail. But I tend to discount that possibility since Anand is experienced at testing SSDs and I would expect that if he changed his test equipment recently (or had his test equipment fail in a way that causes undue stress on the SSDs) that it is likely he would have corrected it before now. Therefore, the most likely cause of the correlated failures is a defect in the 840 Pro SSDs.

Now it is incumbent upon Samsung to do a failure analysis on the units, and hopefully get back to anandtech with a failure report.
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post #3 of 6
Go with an 830 if your worried. I love mine tongue.gif.
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post #4 of 6
Its sheep mentality. Everyone seems to jump on board that since Anandtech had his two drives failing, it means there is something wrong with the product in general. People are unable to think for themselves

Just google up all 840 Pro reviews you can find. There are probably 10-20 of them. Anandtech was the only one who had issues with his. Nobody else.

Look at the ratings at newegg. Nobody had them fail yet
http://www.newegg.com/Product/Product.aspx?Item=N82E16820147193

http://www.newegg.com/Product/Product.aspx?Item=N82E16820147192
post #5 of 6
Mine has been solid.

People on OCN bash OCZ drives the same way, and I've got 8-10 OCZ drives without a single problem. 4 of them in RAID arrays. You'd think reading the threads that every Vertex drive dies within two weeks, but it's just the internet where a few loud unhappy people start scaring everyone.
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post #6 of 6
Quote:
Originally Posted by 2thAche View Post

but it's just the internet where a few loud unhappy people start scaring everyone.

+9999
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