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RE: OK, Thanks..... Would a USB Drive be more Reliable?........

Not sure there's any difference between a USB stick and an SD card. I have an adapter that takes an SD card on one end and plugs into a USB socket on the other. I use this to backup and restore SD cards that plug directly into a Raspberry Pi. The card that had Alzheimers showed the same symptoms used both ways.

I have heard that these cards have an embedded 8051 microprocessor that controls buffering, block erasing and remapping. If the data tables used by the firmware got confused in a crash situation this would explain various failure modes. While it might be possible to recover from some, doing so without any benefit of documentation would be extremely time wasting considering the low prices of these devices. I have come across web pages that describe how to hack the embedded microprocessors in SD cards. This might be amusing if you are into such things, but probably not an effective use of one's time if one has gotten beyond the curious teenager stage or is a professional spook.



Tony Lauck

"Diversity is the law of nature; no two entities in this universe are uniform." - P.R. Sarkar



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