Card read error -- recovery

"Tzortzakakis Dimitrios" wrote:
Well, the actual memory chip is 512 MB, but the memory controller chip of
the card reports to your system 2GB, and your computer "believes" it. After
filling the 512 MB up, it cannot "lie" any more, and you get card error.

Well, maybe. The somewhat more advanced fakes will just map the
remaining 1.5GB into the same address space as the first 512MB, such
that simple memory check utilities will believe everything is fine. Only
when you write more than 512 MB of actual data you will wonder why your
older files or even the file system are being destroyed.
More advance fakes will even exclude the first few MB from remapping,
such that the file system info and root directory will never be
overwritten and stay intact, making the card's failure even more
mysterious.

jue

On 2008-04-25, Jürgen Exner wrote:
"Tzortzakakis Dimitrios" wrote:
Well, the actual memory chip is 512 MB, but the memory controller chip of
the card reports to your system 2GB, and your computer "believes" it. After
filling the 512 MB up, it cannot "lie" any more, and you get card error.

Well, maybe. The somewhat more advanced fakes will just map the
remaining 1.5GB into the same address space as the first 512MB, such
that simple memory check utilities will believe everything is fine. Only
when you write more than 512 MB of actual data you will wonder why your
older files or even the file system are being destroyed.
More advance fakes will even exclude the first few MB from remapping,
such that the file system info and root directory will never be
overwritten and stay intact, making the card's failure even more
mysterious.

jue

That's the reason why I no longer buy flash cards on eBay...

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