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StuartMW
Who Is John Galt?
Premium
join:2000-08-06
Galt's Gulch
kudos:2
reply to Blackbird

Re: Securedly erase memory cards?

Flash memory usually has bulk (entire chip) and sector/page erase functionality. Depending on whether they use NAND or NOR cells they're programmable on a block or individual word basis. Cells have to be erased before being (re)programmed so there's constant erase/program cycles no matter what data you write.

PS: I've written a bunch of code over the years to do all this. Some chips/devices are easier to manage than others.
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