Very often when you want to write files to a particular partition on ADP1, you will get a "Permission Denied" if the partition is mounted read-only.
To get around this, you need to mount the partition read-write. Typically this is done with /system partition
$ adb shell
$ su
$ mount -o rw,remount -t yaffs2 /dev/block/mtdblock3 /system
(Replace /dev/block/mtdblock3 & /system with appropriate device path and mount point, as obtained from cat /proc/mounts)
Display X windows on X11.app from another linux box
15 years ago
thanks, very helpful
ReplyDeleteEven simpler:
Deletemount -o rw,remount /system
i got an android hero Espresso 2.2 booting from SD, and for some reason cant mount -o rw ,remount -t yaffs2 /dev/block/loop1 /system
ReplyDelete, command silently and no output. /system is still ro!
grunt!
discovered a workaround : now i wanna find a version of android better than the 3 i tried, cause its so slow on my touchpro!
ReplyDeletePlease DO NOT GLOAT ..
ReplyDeletepeople need help, just as you do in asking the above question .. but you are not willing to help others ..
what is your "workaround"? what did you do to make it work - or what did you do wrong the first time? the answers will benefit others ..
if you do not want to share - then don't post "I HAVE MADE MINE WORK" stuff ..
How do you get access to the files? Is there a jailbreak procedure first?
ReplyDeleteif you have busybox in your device then 1 line for this:
ReplyDeletegrep " /system " /proc/mounts | awk '{system("mount -o rw,remount -t "$3" "$1" "$2)}'
this will take the right mount path and the right fs type from /proc/mounts and remount /system as read-write
Thanks man you saved me a ton of time! This is the best way to do this. used your on liner then used busybox to chmod -777 system and viola it worked! Thanks
DeleteThanks for this blog and comments. Worked greatly for me (Motorola Defy + Cynagenmod 7)
DeleteI don't have busybox, but I'll Google for it. Thanks.
ReplyDelete@dmanbuhnik
ReplyDeleteDoesn't work for me, but i like the method!
Perfect
ReplyDeleteHi all, I've never posted...but this is what worked for me, and I did not need anything but a TERMINAL EMULATOR on my (rooted) HTC HERO:
ReplyDeletefrom the TERM type:
$ su
# mount -o rw,remount -t yaffs2 /dev/block/mtdblock3 /system
# CHMOD 777 /SYSTEM
and then you can modify anything in /SYSTEM
I used this trick to replace my BOOT ANIMATION, because I had enough perms to modify after doing the CHMOD above.
cp /SDCARD/bootscreen/* /SYSTEM/MEDIA/bootscreen/*
The HTC HERO with 2.1 will boot with either a BOOTANIMATION.ZIP or a BOOTSCREEN folder in /System/Media/
I used TERMINAL EMULATOR from Android Market.
I hope I saved someone some time! :o)
thanks!!!
DeleteOr just install Root Explorer from the Market and click on Mount R/W...
ReplyDeleteWow, Vlada, I should have read your comments earlier. Can't believe it was as simple as that. I used it to delete the cyanongen mod Music.apk because it was giving me problems. Sound would go off and on while playing. Now I will install the stock Music player. Thanks - ag
ReplyDeletenot working guys:
ReplyDeletemount -o rw,remount -t yaffs2 /dev/block/mtdblock3 /system
getting following error:
Permission denied
$ mount: Operation not permitted
Please help
You need root first to remount. Most phones can be rooted with adb and the bluetooth toggle trick. Google search devour root with bluetooth. Should get you root.
ReplyDeleteLooks like he needs superuser permissions, try typing su into terminal first. You should have a # symbol before the line not $
ReplyDeleteThis comment has been removed by the author.
ReplyDelete# mount
ReplyDeletemount
rootfs / rootfs ro,relatime 0 0
tmpfs /dev tmpfs rw,relatime,mode=755 0 0
devpts /dev/pts devpts rw,relatime,mode=600 0 0
proc /proc proc rw,relatime 0 0
sysfs /sys sysfs rw,relatime 0 0
tmpfs /mnt/asec tmpfs rw,relatime,mode=755,gid=1000 0 0
/dev/block/mtdblock4 /system yaffs2 ro,relatime 0 0
/dev/block/mtdblock6 /data yaffs2 rw,nosuid,nodev,relatime 0 0
/dev/block/mtdblock5 /cache yaffs2 rw,nosuid,nodev,relatime 0 0
/dev/block/mtdblock7 /data/HWUserData yaffs2 rw,nosuid,nodev,relatime 0 0
hwvefs /data/hwvefs fuse.hwvefs rw,nosuid,nodev,relatime,user_id=0,group_id=0,al
low_other 0 0
# umount /data/HWUserData
umount /data/HWUserData
# mount -o rw,remount -t yaffs2 /dev/block/mtdblock7 /mnt/sdcard
mount -o rw,remount -t yaffs2 /dev/block/mtdblock7 /mnt/sdcard
mount: Invalid argument
I want to mount inner space as SDcard but failed, do you know how to do to deal with it? thx
Hi,
ReplyDeleteCan I do that through Code???
Dear All,
ReplyDeleteFirst thankyou so much for the great forum we have here, I am using Huawei Ideos u8150, the fone is network locked so I played around, being a total noob I started with installing sdk, and rooted my fone using z4root, rooting was successful
No when I try to copy a modified build.prop to the systems folder in root explorer, the file is copies but is not visible, also I have deleted the original build.prop & I am afraid to reboot the fone,
can restoring the fone to factory settings solve this ? also how come I copy the file to system folder, it gets copied and I still cant see it ?
I have tried pushing the file using ADB command line but the device refuses to mount (persmission denied)
I would really be thankful to anyone who can guide a noob like me, if you dont this forum has enough reasons to love it already,
cheers !
@**: your method worked great on my HTC MyTough4G (HTC Glacier). I did one modification though. People might want to use
ReplyDeletechmod -R 777 /system
The option -R makes it that all the files and subfolders contained in the folder /system can be modified. Cheer!
In a few short years, the Google Android operating system has gained immense foothold in the smartphone market.
ReplyDeletebest android apps
best iphone apps
This is exactly what I was looking for, thanks!
ReplyDeletehw to create a file system.............for android...............
ReplyDeleteplz.....sugest.....me........
ReplyDeleteI had this annoying problem... couldn't delete stuff from /cust on a huawei u8800 and in mounts i didn't find the directory, but i added some things to some files and voila. Heres what i did:
ReplyDeletein /proc/filesystems" I added: "nodev cust" above ext3
then in "/proc/mounts" I wrote:
cust /cust cust rw,relatime 0 0
And it worked perfectly... could now delete those stupid stock apps... :-)
hello , followed ur instructions , rooted my ideos x5 with superoneclick, and trying now to give command lines through cmd to my device in adb mode in order to mount the system partition... but i still cannot give a $ su command , so i cant by result mount any file system as read - write. i was thinking if there is any other file system , except /system in device, that can be mounted as rw .
ReplyDeletepersonaly i want to get in the HWvolumeFactor.cfg
( /system/etc/HWvolumeFactor.cfg) so i can change the variable 60 of the headset volume. what i was trying in the command line was :
c:/Android/android-sdk/tools/>adb shell
$ su
Permission denied
$ mount -o rw, remount -t yaffs2/dev/block/mtdblock0/system
Permission denied
PLZ HELP ME !!!!
I have to root android emulator. I've found some articles, but I've got the same error every time! It's 'cannot create su: Out of memory'!
ReplyDeleteWhat I did:
1. adb push su /data/local
2. adb shell
3. #su
4. #mount -o remount,rw -t yaffs2 /dev/block/mtdblock3 /system
5. # cd /system/xbin
6. # mv su osu
7. # cat /data/local/su > su // I've got an error!!! Cannot create su: Out of memory!
What do I wrong?
Just a guess,but SU is a command, try changing the output file to something else.
DeleteWINSTON
when i tried to install fonts using some applications it gives me error 0x103 cannot install font, rooted
ReplyDeletemount[-r][-w][-o options][-t type] device directory
Hi ,Could you please tell how to change the file permission of a sdcard through DDMS. I have no external Andriod Device and am on Windows+Eclipse.
ReplyDeleteWill this (re)mount sdcard as r/w
ReplyDeletemount -o rw,remount -t yaffs2 /sdcard
And what command can be used to determine when sdcard is mounted as r/o? To combine in cron to auto set back to r/w
Will
mount -o rw,remount -t yaffs2 /sdcard
Work on Droid x? Work on all android phones?
$ adb shell
ReplyDelete$ su
$ mount -o rw,remount -t yaffs2 /dev/block/mtdblock3 /system
(Replace /dev/block/mtdblock3 & /system with appropriate device path and mount point, as obtained from cat /proc/mounts)
##I am trying to determine what mount point is the correct one based on the above advice. Below is my list of mount points. Can anyone offer advice?
rootfs / rootfs ro,relatime 0 0
proc /proc proc rw,relatime 0 0
sys /sys sysfs rw,relatime 0 0
/dev/block/stl10 /system ext4 rw,noatime,barrier=0,data=writeback,noauto_da_alloc 0 0
/dev/block/mmcblk0p3 /cache ext4 rw,noatime,barrier=0,data=writeback,noauto_da_alloc 0 0
/dev/block/stl11 /dbdata ext4 rw,noatime,barrier=0,nodelalloc,data=ordered,noauto_da_alloc 0 0
/dev/block/mmcblk0p1 /data ext4 rw,noatime,barrier=1,data=ordered,noauto_da_alloc 0 0
tmpfs /dev tmpfs rw,relatime,mode=755 0 0
devpts /dev/pts devpts rw,relatime,mode=600 0 0
none /acct cgroup rw,relatime,cpuacct 0 0
tmpfs /mnt/asec tmpfs rw,relatime,mode=755,gid=1000 0 0
tmpfs /mnt/radio tmpfs rw,relatime 0 0
tmpfs /mnt/obb tmpfs rw,relatime,mode=755,gid=1000 0 0
none /dev/cpuctl cgroup rw,relatime,cpu 0 0
/dev/block/mmcblk0p2 /preinstall rfs rw,nosuid,nodev,relatime,vfat,llw,check=no,gid/uid/rwx,iocharset=utf8 0 0
/dev/block/stl3 /efs rfs rw,nosuid,nodev,relatime,vfat,llw,check=no,gid/uid/rwx,iocharset=utf8 0 0
/dev/block/stl7 /mnt/.lfs j4fs rw,relatime 0 0
/sys/kernel/debug /sys/kernel/debug debugfs rw,relatime 0 0
/dev/block/vold/179:9 /mnt/sdcard vfat rw,dirsync,nosuid,nodev,noexec,noatime,nodiratime,uid=1000,gid=1015,fmask=0002,dmask=0002,allow_utime=0020,codepage=cp437,iocharset=iso8859-1,shortname=mixed,utf8,errors=remount-ro 0 0
/dev/block/vold/179:9 /mnt/secure/asec vfat rw,dirsync,nosuid,nodev,noexec,noatime,nodiratime,uid=1000,gid=1015,fmask=0002,dmask=0002,allow_utime=0020,codepage=cp437,iocharset=iso8859-1,shortname=mixed,utf8,errors=remount-ro 0 0
tmpfs /mnt/sdcard/.android_secure tmpfs ro,relatime,size=0k,mode=000 0 0
it's the same mounting point that label system, in your list:
ReplyDelete/dev/block/stl10 /system ext4 rw,noatime,barrier=0,data=writeback,noauto_da_alloc 0 0
nice, I had to try this four times because I typed /dev/block/st19 instead of /dev/block/stl9 a (1) one instead of the letter el (l) ! opps!
ReplyDeleteThanks! My touchscreen driver broke (I tried to edit touchpad.cfg) and I couldn't get to root explorer! Luckily I ADB'd into the system and change it to my backup. The system wouldn't write (r/o) so I used your command and it works! Thanks again, everything works now!
ReplyDeleteThanks buddy....
ReplyDeleteI couldn't add new fonts to my android. Now via your tip, it was so helpful.
Very interesting post. Really a lot of useful information. création et gestion de société à Hong Kong
ReplyDeleteafter the "su" command I get a "su: unknown user root
ReplyDeleteI need help
I tried mounting data partition again just before shutdown in my (rooted)android device.
ReplyDeleteMount succeeded, but chmod and chown failed[operation not permitted]. Any idea about how to solve this?
How do mount through programmatically. Is it possible?
ReplyDeleteThank you very much!
ReplyDeleteFor me - (from windows command prompt)
adb shell
mount -o rw,remount /system
cd /system/customize/resource
mv BoltAnimation.mp3 BoltAnimation.mp3.bak
Now my phone doesn't shout at me if it reboots during work!
after the "su" command I get a "su: unknown user root
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I couldn't add new fonts to my android. Now via your tip, it was so helpful.
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Jonathan Osorio a complété l'un de ces mouvements avec un but emblématique de ce qui a permis à Toronto de s'élever au sommet de l'Amérique du Nord et centrale. Sebastian Giovinco et Jozy Altidore, les PDD et les stars du TFC, se sont alliés pour libérer Marky Delgado à droite. Delgado et Osorio, qui font partie de la fondation talentueuse construite par TFC sous ses PDD, ont obtenu le niveau de pays organisateur. maillot de foot pas cher 2019 Et Toronto a eu plusieurs occasions de prendre une avance qui aurait mis la égalité à égalité lors du retour à Guadalajara. Altidore a bien failli mettre un terme à une attaque frontale brillante:
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