Thank you, pljvaldez
I found out the card is definitely physically damaged.
After trying dd(1) and testdisk four, five times I tried rebooting the box with the card pluged in, but than the maschine hangs and gave me a lot of "no partition table found" errors. "Hangs" here means the maschine did not going on within the boot process I hat to press the reset button.
Before that, some times I found also the maschine was frozen when I pluged the stick in a slot: Scroll and Pause keyboard keys were blinking and no mouse nor the keyboard were responding, anymore.
Clear, I first thought it's the card reader, so I tried some other cards, but they all worked fine.
And finaly running dd and testdisk without any positive results, I gave up.
To my luck, there's no big loss, the physical card itself only.
Again Thank you.
Last edited by tuxboom747; 06-08-2011 at 04:40 PM.