There was a recent thread on [PIC] about EEPROM and not losing data. Here's one on trying to get rid of data. :-) http://www.infoworld.com/t/solid-state-drives/flash-based-solid-state-drive= s-nearly-impossible-erase-263 "Flash-based solid-state drives nearly impossible to erase Think you got rid of that confidential information on your SSD? The=20 results of a new study will come as a rude awakening" Section 2 of the paper on the inner workings of the drive and the list of references at the end were good reading. Full paper here: http://www.usenix.org/events/fast11/tech/full_papers/Wei.pdf --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .