MrRose wrote:Still nobody could answer why 1.2GB partition is being locked for any changes but it allows r/w operations in the same time?
It is write protected all time but because of OS cache you think that some changes are made.
Tinderbox (UK) wrote:I download a Sandisk microsd product manual, and it says you can enable write protection temporarily or permanently, though it does not explain how, though it has to do with software as there is no physical switch.
I have seen usb memory sticks show as write protected, I downloaded an app that unlocked the stick, this was a few years ago and the app did not work on a stick a friend had as i think it only worked for a certain brand.
There are 2 flags (bits) in CSD - temporary and permanent write protect. You can change them with low level SD commands (Program CSD). But the problem here is that TempWriteProtect is disabled and the card is write protected for some other reason. You can disable the write protection (see my other post: viewtopic.php?p=1058730#p1058730
), unfortunately after few written KB or MB the SD card is returned in the old state.