Android Emulator sdcard push error: Read-only file system

Question

I am developing under Android 1.6 (Android SDK 2.1). I create a avd by using avd manager in Eclipse. When I launch this avd, I found that the /sdcard directory's permisson is "d---------". So I can't push file to the sdcard.

Does anyone know how to solve this problem?

Try this: http://stackoverflow.com/questions/2083709/android-emulator-sdcard-push-error-read-only-file-system/40449314#40449314 — intrepidis, Nov 06 '16 at 12:41

score 132 · Answer 1 · edited Dec 17 '15 at 06:58

132

I found this works

$./adb shell
$su
mount -o rw,remount rootfs /
chmod 777 /mnt/sdcard
exit

Source: http://www.coderanch.com/t/611842/Android/Mobile/Android-emulator-sdcard-writable

edited Dec 17 '15 at 06:58

Jay Wick

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answered Oct 07 '13 at 09:48

user2002993

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mount: 'rootfs' not user mountable in fstab – Jakob Alexander Eichler Jul 31 '18 at 13:37
1

su not available for non-rooted device – HendraWD Sep 20 '19 at 06:53

score 47 · Answer 2 · edited May 30 '13 at 07:55

47

Once you started the Emulator from one shell, login to another shell & type

adb shell

You should see # prompt displayed, this is your device(emulator) shell. Now , type following command at adb shell.

mount -o remount rw /sdcard

This will now remount /sdcard with rw(read-write) permission & now you can push your files into /sdcard by using following command from your host shell.

`adb push filename.mp3 /sdcard,`

where filename.mp3 could be any file that you want to push into Android Emulator.

Hope this helps :)

edited May 30 '13 at 07:55

Pratik Butani

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answered Jul 21 '10 at 06:04

ashutosh

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Even if remount does not work, see if the link is proper. That is `/sdcard -> /mnt/sdcard`. If that is properly linked, check the permissions of the directory `/mnt/sdcard`. If necessary permissions are not there, issue the chmod command to do it. For example `# chmod 0777 /mnt/sdcard` should work. PS : You don't need the execution permission normally. – C-- Nov 28 '12 at 11:07
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I had the same problem as @Hissain. I was able to make it work with these commands in stead: `mount -o rw,remount rootfs /` and `chmod 777 /mnt/sdcard`. Hope this helps. – TragedyStruck Jun 17 '14 at 21:21
su: not found ... mount: Permission denied – Marek Bernád Aug 18 '17 at 12:30

score 18 · Answer 3 · answered Oct 09 '12 at 09:59

18

Ensure two things in the AVD manager utility for the emulator:

SD Card size is mentioned e.g. 512.
From the Hardware tag, press New and select "SD Card Support" from the drop down menu.

Now, start the emulator. SD Card shall now support writing as well.

answered Oct 09 '12 at 09:59

Sumit

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Where is hardware tag? i dont see that in Edit Android Virtual device (AVD) – tumbudu Apr 26 '13 at 05:12
I see hardware tag for avds which created on command line only. – tumbudu Apr 26 '13 at 05:44

score 10 · Answer 4 · edited Nov 08 '14 at 04:16

10

Android studio version 0.8.9 and above has a bug creating AVDs.

See Issue 78434.

Workaround

go to your ADV folder in .android folder and find your AVD config.ini
open it with a text editor that can handle unix newlines. (Notepad will run the lines together since they don't have CR-LFs.)
change hw.sdCard=no to hw.sdCard=yes

this should work for everyone in new builds

edited Nov 08 '14 at 04:16

Jerry101

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answered Oct 31 '14 at 14:07

afra mehrparvar

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Thanks for the link, this helped me out. The recommended solution now is to find your AVD config.ini and change hw.sdCard=no to hw.sdCard=yes. This worked for me. – Tim Malseed Nov 03 '14 at 22:37
yes that's new solution . u welcome :) really happy it helped u . yeah this is vry good solution . because no way one can put even with all this linux codes as long as this issue persist :) – afra mehrparvar Nov 04 '14 at 14:42
Amazing how much time I just lost because of this... Thanks a lot! – rectummelancolique Nov 10 '14 at 00:33

score 7 · Answer 5 · edited Sep 10 '13 at 06:35

7

I think the problem here is that you forgot to set SD card size

Follow these steps to make it work:

step1: close running emulator
step2: open Android Virtual Device Manager(eclipse menu bar)
step3: choose your emulator -> Edit -> then set SD card size

This works well in my emulator!

edited Sep 10 '13 at 06:35

tipycalFlow

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answered Jul 28 '13 at 19:03

tan

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score 7 · Answer 6 · answered Mar 14 '10 at 10:02

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Maybe it sounds stupid but it worked for me when I had the same problem: delete the created avd and create one again through AVD Manager with a sd card of, for example, 512MB.

Check that both have the correct permissions and if not, try to change them with chmod.

And if everything still fails, repeat the process but creating both avd and sd card manually via terminal:

android create avd -n my_avd -t 7
mksdcard -l e 512M mysdcard.img
emulator -avd my_avd -sdcard mysdcard.img

Hope that helps!

answered Mar 14 '10 at 10:02

Edu Zamora

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@AnkitSrivastava You should execute this commands in your terminal (bash, in my case). – Edu Zamora Aug 29 '13 at 12:08
Didn't need to recreate the AVD, just reboot it. – jab Feb 12 '14 at 18:57
Yes. Creating an other type AVD works. Thank you. This fixed an other problem as well. Now I can use the camera. – makkasi Oct 02 '18 at 20:11

score 4 · Answer 7 · edited Sep 26 '18 at 18:50

I tried @user2002993 great help but it one place it need to be a little edit so I edited and here what worked for me on Android Studio, emulator android 5.

Go to your adb folder right click on blank area and select "open command window here" or if you installed adb by adb-installer open cmd and type these commands:

adb devices

It should show your emulator number and detail. Then followed command here:

adb shell

Now it should show you prompt #

su

mount -o rw,remount rootfs

chmod 777 /mnt/sdcard

exit

exit

Yeah double exit needed, now your prompt of adb shell is gone. Put a file in to your adb folder and give this command and see if it got fixed.

adb push "your file name like : 1.jpg" /sdcard/

or

adb push "your file name like : 1.jpg" /storage/sdcard/

Now in cmd it shoudl show you transfer time instead of creepy read-only thing

and as i see unfortunately .. android studio version 8.10 and above that change a little bit studio structure give this error ...i tested with studio 8.09 and there was no such an read-only error google should fix this — afra mehrparvar, Oct 30 '14 at 11:12

score 4 · Answer 8 · answered Jul 10 '11 at 12:56

4

Make sure that you had given a value which is greater than zero for SD Card size in the Create AVD Window for that particular emulator.

answered Jul 10 '11 at 12:56

Dipin

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score 3 · Answer 9 · answered Oct 20 '11 at 23:19

3

mount -o remount, rw /sdcard

this is the correct way to remount your sdcard using your emulator.

answered Oct 20 '11 at 23:19

teddy

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score 2 · Answer 10 · answered Jul 21 '13 at 20:25

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I increased the virtual memory of sdcard up to 512 MB for the emulator and that was enough

answered Jul 21 '13 at 20:25

user2604908

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score 1 · Answer 11 · answered Jan 30 '14 at 09:36

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I guess, you didn't insert memory size at the time of creating avd. you can do that by editing the avd. screenshot

answered Jan 30 '14 at 09:36

Suresh Sharma

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score 0 · Answer 12 · answered May 18 '13 at 14:50

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Windows uses backward slashes, linux uses forward slashes.

answered May 18 '13 at 14:50

nomapp

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score 0 · Answer 13 · answered Dec 04 '13 at 21:44

0

sometimes this can cause of a very simple reason, go to your list in eclipse and check whether you have set SDCard size

answered Dec 04 '13 at 21:44

score 0 · Answer 14 · answered Oct 24 '14 at 12:34

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I had this problem on Android L developer preview, and, at least for this version, I solved it by creating an sdcard with a size that had square 2 size (e.g 128M, 256M etc)

answered Oct 24 '14 at 12:34

Eli

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score 0 · Answer 15 · answered Dec 20 '14 at 05:09

In adb version 1.0.32 and Eclipse Luna (v 4.4.1).

I found a directory in the avd /mnt/media_rw/sdcard that you can write to using the adb command. adb push {source} /mnt/media_rw/sdcard

There appears to be rw access to this directory.

Hope this helps :-)

score 0 · Answer 16 · answered Mar 29 '15 at 11:00

0

Alternate way: Dismount the drive (from settings/storage) and re-mount the sdcard also fixes the problem. (verify by moving a file from internal storage to sdcard) In any case, this simple method saved my butt this time :)

answered Mar 29 '15 at 11:00

Raymond Fraikin

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score 0 · Answer 17 · answered Apr 06 '15 at 12:41

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Give any size to Sdcard in Emulator
unchecked the read only option from c:\user...android\avd -> properties
push a file through file explorer
restart the Emulator

It will definitely works

answered Apr 06 '15 at 12:41

Kamleshwer Purohit

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score 0 · Answer 18 · answered Mar 03 '16 at 22:01

0

With me in the end helped In the emulator to run applications manager and setting permissions for storage.

answered Mar 03 '16 at 22:01

momik bęc

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score 0 · Answer 19 · answered Nov 06 '16 at 12:26

0

Try this in a Terminal Emulator as root:

restorecon -v -R /data/media

answered Nov 06 '16 at 12:26

intrepidis

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score 0 · Answer 20 · answered Apr 15 '23 at 10:34

In Latest AVD just remove the sd card, it will work as charm. I also faced the same when it has studio managed sd card=512mb, When i selected continue with NO SD Card then its working fine. I am attaching the config.ini file of emulator

AvdId=Pixel_6_Pro_API_28
PlayStore.enabled=false
abi.type=x86
avd.ini.displayname=Pixel 6 Pro API 28
avd.ini.encoding=UTF-8
disk.dataPartition.size=4G
fastboot.chosenSnapshotFile=
fastboot.forceChosenSnapshotBoot=no
fastboot.forceColdBoot=no
fastboot.forceFastBoot=yes
hw.accelerometer=yes
hw.arc=false
hw.audioInput=yes
hw.battery=yes
hw.camera.back=virtualscene
hw.camera.front=emulated
hw.cpu.arch=x86
hw.cpu.ncore=4
hw.dPad=no
hw.device.hash2=MD5:a8abfd3536f3d35e4ba2041a7b99f40e
hw.device.manufacturer=Google
hw.device.name=pixel_6_pro
hw.gps=yes
hw.gpu.enabled=yes
hw.gpu.mode=auto
hw.initialOrientation=Portrait
hw.keyboard=yes
hw.lcd.density=560
hw.lcd.height=3120
hw.lcd.width=1440
hw.mainKeys=no
hw.ramSize=1536
hw.sdCard=no
hw.sensors.orientation=yes
hw.sensors.proximity=yes
hw.trackBall=no
image.sysdir.1=system-images\android-28\google_apis\x86\
runtime.network.latency=none
runtime.network.speed=full
sdcard.size=512 MB
showDeviceFrame=yes
skin.dynamic=yes
skin.name=pixel_6_pro
skin.path=C:\Users\User\AppData\Local\Android\Sdk\skins\pixel_6_pro
tag.display=Google APIs
tag.id=google_apis
vm.heapSize=384

score -1 · Answer 21 · answered Feb 13 '12 at 19:52

-1

make sure that you have the correct permissions.

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

answered Feb 13 '12 at 19:52

esse

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Here users are not asking to write, they want to see the contents of files inside emulator. – Durgesh Kumar Apr 15 '23 at 10:36

Android Emulator sdcard push error: Read-only file system

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