Hi friends!!!
Anyone know how to delete or format a microsd card with these Android partitions?
I’ve tried everything dd, testdisk, fdisk, gpart, etc…nothing could remove those damn partitions.
Thanks in advance,
Marcelo
CAUTION!
Always double check the device name!
# dd if=/dev/zero of=/dev/da0 bs=1M
will destroy all data and partition tables on that device (/dev/da0).
If you only want to delete the two partition entries:
# gpart delete -i 1 da0
# gpart delete -i 2 da0
In addition, after deleting the partitions, you can delete the partition scheme:
# gpart destroy da0
You must delete the partitions first, as I wrote in the previous post.
Hello friend, I did this before but without success! See the prints >
I think Android writes some write protection.
Freezes and after a few minutes it displays the IO error
But you didn’t eject the media (as you did here) before trying to access it, right? Did you check the write-protection-switch on the SD card or it’s adapter?
Are there any error messages regarding da0 (dmesg | grep da0)?
Hi friend mk1,
Yes, after performing the commands to remove partitions 1 and 2 I am forced to eject the card because it freezes, remembering that it is not an SD but a microsd so there is no physical lock.
Surely Android wrote on microsd an encrypted security GPT partition that I believe no one on the face of the earth can remove.
I’ve been reading about the subject but at the learning level because I don’t intend to spend our time with it anymore.
The only way to solve this I believe is by reprogramming the microsd card controller, but unfortunately I couldn’t get the microsd’s CID because it would depend on directly accessing the microsd without using a reader.
USBDEV.RU has several apps related to this theme.
Thank you very much friend for the attempts!!!
Best wishes!!! 
Marcelo
Thank you, Marcelo. I have wondered about that issue since I first downloaded NomadBSD.
Hi Donald, how are you?
Glad to help you!
Best wishes,
Marcelo