On 3/15/2011 11:29 AM, Krisjanis Linkevics wrote:
SD cards have controllers inside as well. This is "hard data" from an Apacer datasheet of 2005: "The SD Memory Card includes an intelligent controller that manages interfaced protocols and data storage and retrieval as well as Error Correction Code (ECC) algorithms, defect handling and diagnostics, power management and Content Protection for Recordable Media related functions".
I stand corrected. Thanks for the clarification.
Controllers in modern cards are designed so as to balance writes across the card. That coupled with good error detection and correction routines should make the card last forever under normal load. That is assuming "normal" error rate. Could happen that the memory on the cards is produced from crappy materials or shipped with some obvious faults (like the first batch of K-5 sensors) - that makes this discussion a purely theoretical one, we have no knowledge of what quality materials are used for which cards
So, it effectively implies that using brand names such as SanDisk or Lexar is a good idea even if their cards cost somewhat more than those produced by second tier manufacturers... That is, it is equivalent to hope or belief that SanDisk has ability and inclination to invest in proper R&D, QA and QC so as to roll out quality products to market...
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