Cannot format micro SDcard after installed Android-x86_CM-14.1-r2 on it

[Feisheng Gu]

Hello everyone 

I got so trouble formatting my Sony 16G micro SDcard after I successful install CM-14.1-r2 on it. How I might cause this situation, well after install finished I got Wechat install on it to test the system's function, it work perfectly exciting RIGHT? and then I reboot, BOOM all setting is back to first time install. User's data didn't saved so I reinstall CM, when there is asking to chose Read-Write file system, I might stupidly selected NO, damnit. And here we are, I'd tried many things to get this SDcard back to normal :

the SDcard is using GPT two partition (one is EFI partition fat32 formatted, the other is Linuxfile-system partition ext4 formatted)

1. regular Windows disk right-click formatting? NOOp ;

2.CMD Windows DiskPart formatting? NOPE 

also tried rm -rf * after booted up CM-14.1-r2 no luck :(

Could somebody help me out with it? much appreciated.

[Feisheng Gu]

   tried format tool such as SDformatter/Diskgenius...still no

[Kossuth]

Have you tried booting from some kind of Linux rescue image on a USB stick and then running for example Gparted? I usually get everything done with it. You can try the following image

http://www.system-rescue-cd.org/

You can make the bootable USB-disk for example with

https://www.linuxliveusb.com/

[Feisheng Gu]

Thanks for answering. i did right after you reply, but i used Gparted you posted link still not working. i'd tried Ubuntu Live ISO it has Gparted too and a physical Ubuntu installed machine attempt to delete/format partition no luck at all. i started to wonder if it had something to do the whole file system are read-only at SDcard. Cause we dont have permission to change it at all ? What can we do something to change those system files Read-Writeable while we boot up CM-14.1-r2 ? THANKS

[Kossuth]

I googled "read only sd card" and got a following link

https://www.quora.com/How-do-I-fix-my-micro-SD-card-that-became-a-read-only-memory-card

First is to check that does your card or card adapter have physical readonly switch? If not, then there are some other stuff you can try form the link.

[Feisheng Gu]

sadly I try all of those method before I posted this :( . So I wonder what I can actually do while I'm in CM system , maybe change system read-write permission by using 'chmod' command ; or developer mode ? debug mode? to erase all file/partitions? idk 

[Chih-Wei Huang]

Feisheng Gu <gufei...@gmail.com> 於 2018年10月4日 週四 下午6:19寫道：

>
> sadly I try all of those method before I posted this :( . So I wonder what I can actually do while I'm in CM system , maybe change system read-write permission by using 'chmod' command ; or developer mode ? debug mode? to erase all file/partitions? idk

Have you tried the auto-install function of the android-x86 installer?
Choose "Advanced options" -> "Auto Install to specified harddisk",
then choose the sdcard as the destination.
It should work if your sdcard is not physically damaged.

[Feisheng Gu]

thanks for replay. sadly i tried that many times :(.