468
people found this helpful, as of 2023
ranked #40,701 most helpful
out of 571,544,897 reviews
★★★★★
Professional Test Results - Highly Recommended.
I have been in the USB business for almost 10 years. We always test the work of factories before we buy mass quantities for use in industrial processing. I get a chance to be a “mystery shopper” when a factory sells on Amazon. I can test their product without them knowing. There is no better way to get a true sense of their quality then by testing their normal, average, everyday output. No way for them to send me "cherry picked" product! :-)
I tried the product from this supplier and am very impressed at their quality. I can recommend them without reservation, and that is rare in this business!
Here is what I found:
1) The product came professionally packaged. I sometimes receive drives stuffed in polybags... as if someone just took a handful and shipped them to me. Not this time. This created a great first impression. Of course, the real measure is in the product quality, which I describe next.
2) They use SMI controllers, which is THE premium controller. It costs a bit more, but performs reliably and is worth the extra cost. Most factories will use lower-grade controllers like Alcor or Chipsbank. The cost savings with the other controllers is not worth the stability risk.
3) They used a brand name memory. In this case it was Hynix. It’s not so much the brand per se, but it’s that they are using identifiable memory. Most of the low-cost sellers on Amazon other online sites use generic bulk memory to save money.
4) They use premium grade memory, not the “promo-grade” memory preferred by low-cost sellers. The premium grade, aka “Gooddie” is known for stability and high read/write speeds. Quite frankly, I do not often see such high grade memory used in these kinds of sales and I was quite impressed. The promo-grade memory is often downgrade memory that cannot pass at higher capacities. A 8GB drive, for example, often uses 16GB memory that cannot pass testing at that capacity. The factory will then program the controller chip to downgrade it to 8GB. Not this factory... they used high-grade from the start.
For our testing methods, we use a dedicated $35,000 machine from IMI to conduct read/write tests. We test for speed. We then burn-in the drives by writing test patterns and reading them back for comparison. The “promo-grade” memory will typically see a lot failure rate of 17% or more. My test lot from this supplier showed ZERO failures after a 100% test.
The read/write speed test were quite impressive as shown here. The real capacity is shown in bytes, and the speeds are shown in MB/s. These are the individual results from the 10-pack I purchased. The review does not allow for tables, so I included a screen capture.
Test TestDate Testing Real_Bytes Read Write
7243 1/9/2016 Passed 8053063680 24535 8813
7243 1/9/2016 Passed 8053063680 24595 8487
7243 1/9/2016 Passed 8053063680 24647 8560
7243 1/9/2016 Passed 8053063680 24635 8412
7243 1/9/2016 Passed 8053063680 24569 8801
7243 1/9/2016 Passed 8053063680 24590 8724
7243 1/9/2016 Passed 8053063680 24684 8890
7243 1/9/2016 Passed 8053063680 24632 8982
7243 1/9/2016 Passed 8053063680 24605 9732
7243 1/9/2016 Passed 8053063680 24673 8791
These are very good results and these are very high quality drives.
I welcome questions.
January 2016 · Electronics · verified purchase