Please help! Restore pictures from Low Level formated Card.

Started Nov 11, 2013 | Questions thread
baxters Veteran Member • Posts: 5,156
Re: Please help! Restore pictures from Low Level formated Card.

Pontoneer wrote:

There may be something in the post about the way SD cards are structured . Apart from the G11 , all my other Pentax and Nikon cameras use CF cards so may not be directly comparable ( they take of the order of 5-10 seconds to format cards as well ( which should only be wiping the directory ) . I sometimes take my CF cards and do a low level format in my computer using Disc Utility / Erase / Zero out data before formatting again in whichever camera .

A decade ago, I designed circuits with memory chips similar to those used in SD cards.  I recall the memory had a mode where a single command erased entire sectors, as opposed to bit by bit access.

I would guess that SD card controller standard provides a command sequence to access that mode.

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