Develop Bugs

[Q] Unable to mount /sdcard as rw

I'm currently trying to use adb to push a ROM to my sdcard on my Verizon Galaxy Nexus. However, it keeps failing due to /sdcard being a read-only filesystem.
When I adb shell into the phone and type mount, i get this (among others):
Code:
/dev/block/mmcblk0p12 on /sdcard type ext4 <ro,relatime,barrier=1,data=ordered>
Attempting to mount /sdcard as read-write is not proving fruitful:
Code:
mount -o remount rw /sdcard
Can anyone help? I'm just trying to get a rom on there so i can install it. Unfortunately, the phone never leaves the google screen when i try to boot, so recovery and fastboot are my only options.

mount -o rw,remount /dev/block/mmcblk0p12 /sdcard
try that

DonDizzurp said:
mount -o rw,remount /dev/block/mmcblk0p12 /sdcard
try that
Click to expand...
Click to collapse
Thanks for the help. It now mounts as rw. However, when i try to
Code:
adb push C:\rom.zip /sdcard/rom.zip
It fails and i get a Fil I/O error.

ttremblay said:
Thanks for the help. It now mounts as rw. However, when i try to
Code:
adb push C:\rom.zip /sdcard/rom.zip
It fails and i get a Fil I/O error.
Click to expand...
Click to collapse
To make things easier, copy the .zip file to the folder where you have ADB then try
adb push ./rom.zip /sdcard/rom.zip

I never could get things to push to sdcard while in recovery mode no matter what I tried.
adb sideload was how I always did I
---------- Post added at 04:52 AM ---------- Previous post was at 04:51 AM ----------
Or maybe instead of using "/sdcard" use "/data/media"?

Hello there, my samsung galaxy s2 i9100's internal sdcard suddenly became read-only shortly after updating it to 4.1. I've tried using the command: ''mount -o remount, rw /sdcard'' which works until i reboot or connect it to an external usb storage device. I'm kindly asking if anyone knows a permanent solution to my problem. P.S- I'm a bit new to this android thing so make your explanations as easy as possible. Please help

Device or resource busy

Hi,
I have rooted my pixel c running android 7 but am unable to remount /system as rw. I get "Device or resource busy" after running mount -o remount,rw /system
Can anyone confirm this? What can I do to resolve this issue?

I am getting the same issue on my Pixel XL

Have a try this way ...
Code:
mount -o rw,remount /system

followmsi said:
Have a try this way ...
Code:
mount -o rw,remount /system
Click to expand...
Click to collapse
Thanks a thousand!

followmsi said:
Have a try this way ...
Code:
mount -o rw,remount /system
Click to expand...
Click to collapse
Thanks mate

[Guide] How to disable Virtual CDrom on OOS

Just wanted to know if anyone knows how to disable the virtual cdrom in OOS when you plug in usb to pc. I have looked and there is no cdrom.iso like other phones i had.
Edit: Just overlooked the file.
If anyone is interested in disabling the virtual cdrom upon usb connection, navigate to /system/etc with a root filemanager and rename usb_drivers.iso to usb_drivers.iso.bak and reboot. or enter the following commands in adb shell and reboot. Phone MUST be rooted.
Code:
adb shell
su
mount -o remount,rw /system
mv /system/etc/usb_drivers.iso /system/etc/usb_drivers.iso.bak
mount -o remount,ro /system
Revert
Code:
adb shell
su
mount -o remount,rw /system
mv /system/etc/usb_drivers.iso.bak /system/etc/usb_drivers.iso
mount -o remount,ro /system
Edit: fixed a typo

for everyone getting this Error:
mount: '/dev/block/bootdevice/by-name/system_b'->'/system': Device or resource busy
Click to expand...
Click to collapse
You have to use this Command
mount -o rw,remount /system
Click to expand...
Click to collapse
instead of
mount -o remount,rw /system
Click to expand...
Click to collapse

Thanks!
That worked for my OnePlus 6.

Thanks!
That worked for my OnePlus 7 pro.

[Q] Anyone know how to access System_Root from ADB when in Recovery?

Anyone know how to access System_Root from ADB when in Recovery?
Code:
# mount -o rw,remount /system_root
mount: can't find /system_root in /proc/mounts
Boogered up my SystemUIGoogle and wanted to replace it via ADB since I can't get back into the OS and TWRP's file manager can't access system_root either.

that should be in regular system/privapp

flex360 said:
that should be in regular system/privapp
Click to expand...
Click to collapse
Ahh, thank you but the one we modify is actually in /system_root/system/priv-app for the Pixel and 7.1.x.

Startup Scripts

Stock ROM, oreo.
How do you execute scripts on startup? Either by init.d or some other means, doesn't matter as long as it works. The /system/etc/init.d folder isn't there. Remounting /system for me doesn't work:
mount -o remount,rw -t ext4 /dev/block/platform/hi_mci.0/by-name/system /system
I get: '/system': Device or resource busy
I reboot into TWRP, I get the same error as above. Any help please?

TouchOdeath said:
Stock ROM, oreo.
How do you execute scripts on startup? Either by init.d or some other means, doesn't matter as long as it works. The /system/etc/init.d folder isn't there. Remounting /system for me doesn't work:
mount -o remount,rw -t ext4 /dev/block/platform/hi_mci.0/by-name/system /system
I get: '/system': Device or resource busy
I reboot into TWRP, I get the same error as above. Any help please?
Click to expand...
Click to collapse
For mounting you use these command.
In local terminal
HWBND-H:/ $ su
HWBND-H:/ # mount -o rw,remount /system
In adb terminal
adb shell su -c mount -o rw,remount /system
And to see how is mounted
HWBND-H:/ # mount | grep system
It should return like this.
/dev/block/mmcblk0p51 on /system type ext4 (rw,seclabel,relatime,data=ordered)
And to go back to ro do this or reboot:
HWBND-H:/ # mount -o ro,remount /system
HWBND-H:/ # mount | grep system
/dev/block/mmcblk0p51 on /system type ext4 (ro,seclabel,relatime,data=ordered)

mrmazak said:
For mounting you use these command.
In local terminal
HWBND-H:/ $ su
HWBND-H:/ # mount -o rw,remount /system
In adb terminal
adb shell su -c mount -o rw,remount /system
And to see how is mounted
HWBND-H:/ # mount | grep system
It should return like this.
/dev/block/mmcblk0p51 on /system type ext4 (rw,seclabel,relatime,data=ordered)
And to go back to ro do this or reboot:
HWBND-H:/ # mount -o ro,remount /system
HWBND-H:/ # mount | grep system
/dev/block/mmcblk0p51 on /system type ext4 (ro,seclabel,relatime,data=ordered)
Click to expand...
Click to collapse
Thank you for your response I appreciate it. I ended up making my problem more complicated than it had to be. The solution was to open terminal and do:
adb shell
su
mkdir /system/etc/init.d
cp /storage/emulated/0/Downloads/script.sh /system/etc/init.d/script.sh
If I tried to create the folder through a rooted app (Total Commander), it didn't work. Copying the file through an app didn't work either.