Thursday, January 26, 2012

Are you sure it's my flash?

How to Find the Culprit of a Duplication Failure

If you frequently use flash duplicators to copy usb drives, it’s probably not unusual that you have experienced a duplication failure in the middle of the process.  Let us assume your duplicators are built with quality, so the culprit is really the USB drive, source or target (or both).For those who really want to know more about the causes, we take this opportunity to share our troubleshooting experiences. Before we dig in, bear in mind that a standard USB drive consists of two chips: controller and NAND flash.

And when we conclude a drive is responsible for failed duplication, it’s got to be some glitch over one or a combination of these three: 1) controller; 2) flash; 3) connection in between.To narrow down on the culprit, we advise you to conduct further read/write testing on a PC.  With help from flash testing tool such as H2testw, you can repeatedly write and read on your drive to the full capacity.  If there’s any bad sector on your drive (interpreted as NAND flash issue), you’ll hardly come through the test; if you experience unpredictable outcome, good runs mixed with failures, it is most likely the controller or its connection to NAND is flawed. Based on our years of experiences supporting customers, flash of inferior quality usually lead to duplication failures, which is why we suggest customers conduct pre-production testing of their flash on their duplicators, and adjust copy speed to accommodate quality discrepancies if necessary.  Bottomline, go with flash of known quality to save time and money for the long run!


How to Duplicate Your USB

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