topic Re: mount sdcard in i.MX Processors

mount sdcard

yoonseok — Thu, 09 Jan 2025 06:55:04 GMT

cpu : imx8m mini

android:13

I'm trying to use sdcard by mounting it in user mode

If you look at Gaga's stuff after booting up, it's as follows
brw------- 1 root root 179, 25 1970-01-01 00:00 /dev/block/mmcblk1p1
drwxrwxrwx 2 root system 3452 1970-01-01 00:00 sdcard

in this state
su root mount /dev/block/mmcblk1p1 /data/sdcard
After the actual release, the following results are obtained.
drwx------ 4 root root 131072 2024-12-19 20:13 sdcard

It is not available to all users in this state.

Is there any way I can use it in user mode?

Re: mount sdcard

Chavira — Thu, 09 Jan 2025 16:40:32 GMT

HI @yoonseok!

The issue arises because the default permissions after mounting the SD card are restrictive (drwx------), allowing access only to the root user. To make the SD card accessible to all users, you need to adjust the permissions and ownership after mounting.

Try changing the ownership of the mounted directory to a specific user or group (e.g., system or media_rw) and modify the permissions to make it accessible to other users

Best Regards!

Chavira

Re: mount sdcard

yoonseok — Mon, 13 Jan 2025 07:59:19 GMT

Run as follows

su root chown root system /dev/block/mmcblk1p1
su root chmod 777 /dev/block/mmcblk1p1
ls -l /dev/block/mmcblk1p1
==> brwxrwxrwx 1 root root 179, 25 1970-01-01 00:00 /dev/block/mmcblk1p1

su root chmod 777 /data/sdcard
su root chown root system /data/sdcard
==> chown: 'system' to 'root:': Read-only file system

su root ls -l /data
==> drwxrwxrwx 2 root system 3452 1970-01-01 00:00 sdcard

su root mount /dev/block/mmcblk1p1 /data/sdcard
su root ls -l /data
==> drwx------ 4 root root 131072 2024-12-19 20:14 sdcard

What's wrong?

Re: mount sdcard

yoonseok — Mon, 13 Jan 2025 08:08:22 GMT

I tried to change it

The results are as follows

su root chown root system /data/sdcard

su root chmod 777 /data/sdcard

su root ls -l /data

==> drwx------ 4 root root 131072 2024-12-19 20:21 sdcard