Zitat
Optional write-protect tabWhen looking at the card from the top (see pictures) there is one required notch on the right side (the side with the diagonal notched corner). On the left side there is usually a tab. This is the write-protect tab. The MMC card has neither notch. The tab / notch works the same way as the notches on compact audio cassettes and videotape cassette tapes or floppy disks.
When this write-protect tab is in the down position (away from the end that is inserted) then it is write protected and read-only. When the tab is in the up position it is write enabled. Since the tab is optional then the card can have no switch and no notch, which makes the card always writable, or it can have an empty notch and be a ROM card, or always write-protected and read-only. If the tab becomes broken or falls off then the card will become a write-protected ROM card and no longer be writable. A possible troubleshooting solution would be to apply tape over the notched area (avoiding the connectors and the other notch) to configure the card in a permanent writable state.
The write protect tab feature is optional within the Secure Digital Association guidelines. Some manufacturers claim that the write switch is easily broken, and do not include it on all their card models[1].
Some users have reported data loss when the switch was worn down or broken especially on early sockets where manufacturing process was not perfected or due to firmware bugs[citation needed].
http://en.wikipedia.org/wiki/Secure_Di…ite-protect_tab
Es ist so wie bei Disketten nur ein Hinweis an das Lesegerät und nicht an sich eine Schreibsperre.
Es spricht eigentlich nichts dagegen das mit dem Tixo auszuprobieren, allerdings mußt du aufpassen, das sich nichts verkeilen kann, sonst kriegst es nicht mehr raus, solltest du auf jeden Fall nur in einem 5€ Lesegerät und nicht im Internen Lesegerät vom Laptop ausprobieren. Ansonsten könntest du mit Epoxy-Harz was "dranmodelieren", Exzesse abschneiden/abschmirgeln. Ist aber viel umständlicher und da abtragende Verfahren notwendig sind richtest event. noch mehr Schaden an der Karte an.
mfg Oliver