how can i launch e2fsck in twrp. - Samsung Galaxy Nexus

i need to check my nand memory to see if there is any demaged sector in it (im experiencing a lot of freezing with custm and stock roms, and i think it may be related to that).. i found that i can do that with e2fsck from the terminal, /system and /data need to be unmounted (it seems those are unmounted by default in TWRP), but i dont know how to go into the terminal in TWRP, in advanced options there is an option that say terminal but when i go there looks more like a file manager... im kinda noob in all this.. plz help!

adb shell
Sent from my i9250

Related

DamageControl 3.2.2.1 Apps2SD

Hello All,
I have a rooted Evo with DamageControl's 3.2.2.1 rom. I know it has apps2sd built into the OS, yet I cannot seem to get this working at all. Would anyone be kind enough who has this OS and a2sd working to make a quick and dirty guide? Ihave tried partitioning via Rom Manager and then turning it on...tried a few things. Any help is appreciated.
I would like some help with this as well. Have tried all the same steps, just can't seem to figure it out.
Sent from Ye olde Evo
Im sure someone out there knows how to do this!
Got this from another forum:
Did you patition it on the phone? Did you upgrade EXT2 to EXT3? If the answer to either or both of these, that could be the problem.
Type this in order:
cd c:\android-sdk-windows\tools (or wherever you have installed the sdk)
adb remount
adb shell
busybox --install /system/xbin
mkdir /system/sd
a2sd
exit (wait until its done doing its thing, you should see # when its done)
restart your phone after the prompt is done spewing and you're all set.
Click to expand...
Click to collapse
Personally I don't think there's any need for this since the EVO has hugeee internal memory. This was used mostly on older phones.
Thanks I'll try it when I get home
correct, most roms using this will only use app2sd if you have the ext partition on the sdcard, otherwise it defaults to the normal app storage

[~SOLVED] Problem: Can't mount sd-ext

SOLVED: This was fixed by adding and using e2fsck, see the link in post #3. I had issues using adb push to install the tools, see the CyanogenMod thread. I do NOT believe the parted files he linked were intended to be used on ext4, so YMMV, but it did convert my fscked up ext4 partition to a over-writable ext2.
*********************************
I am having a problem with my sd-ext partition being unable to mount. After a relatively routine procedure, I suddenly have this problem (below), for example when I tried to Nandroid Restore my sd-ext partition.
Code:
E:Can't mount /dev/block/mmcblk0p2
(File exists)
Setup: HTC Desire; HBOOT 0.93, S-ON; ClockWorkMod v2.5.0.7; CyanogenMod-6.0.2; DTapps2sd
I was trying the relatively simple procedure of removing a couple of system Apps, according to the instructions on the CyanogenMod Wiki:Barebones.
I had minor problems with capitalization since I'm using Windows.
I removed Calculator, Email, and Calendar. Upon restart, all of my Apps are gone, except the few system apps and GApps that were not moved via dtapps2sd.
The phone still "works", I can send/receive SMS, make calls etc., but it's pretty highly crippled.
I've tried a Nandroid Restore, but it gives this message above (as did my attempt to do a Nandroid Backup).
The dtapps2sd "repair" command also said something about "cannot mount".
I tried to wipe and reflash CyanogenMod, which worked (in that it did re-flash). But when I tried to then Restore, I got the same "Can't mount" problem.
I also tried the following fastboot command I found in another thread, with no effect
Code:
fastboot oem enableqxdm 0
fastboot reboot
I have noticed that whey I use Terminal Emulator, the Permissions on mmcblk0p2 don't match the other blocks. Could this be related? Sadly, my Linux karate is weak :/
Code:
$ cd /dev/block
$ ls -al
..
..
brw------ .. .. .. .. .. mmcblk0p1
brw-r--r--.. .. .. .. .. mmcblk0p2
brw------ .. .. .. .. .. mmcblk0p1
..
I guess I haven't yet tried the HTC RUU, which is always a possible fallback. Or I could try to flash a stock PB99IMG.ZIP file. But those seem like just a generic "solution" that doesn't really involve any understanding. And it certainly doesn't help others with this same problem, or to figure out what I did to create this problem, so others could avoid that.
UPDATE: Link for PB99IMG.ZIP. It's ~140MB, and ROM+Radio specific, so no I won't post it here.
http://shipped-roms.com/shipped/Bravo/
Still trying
I just tried another suggestion from these threads:
http://code.google.com/p/cyanogenmod/issues/detail?id=1614
http://forum.cyanogenmod.com/index.php?/topic/253-test-builds/page__st__380__p__6124#entry6124
Code:
adb shell
# su
# tune2fs -O ^huge_file /dev/block/mmcblk0p2
# sync
# reboot
But that did nothing for me.
More info
Following along from raskolnik
http://forum.cyanogenmod.com/topic/...ternal-storage/page__view__findpost__p__56396
I now have parted (and others) added to my ClockWorkMod Recovery
Below is the partition info for my SD card
Code:
parted /dev/block/mmcblk0
GNU Parted 1.8.8.1.179-aef3
Using /dev/block/mmcblk0
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) print
Model: SD USD (sd/mmc)
Disk /dev/block/mmcblk0: 8017MB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Number Start End Size Type File system Flags
1 32.3kB 7444MB 7444MB primary fat32
2 7444MB 7979MB 535MB primary ext4
3 7979MB 8011MB 32.9MB primary linux-swap(v1)
I followed that up with a check with e2fsck
Code:
~ # e2fsck /dev/block/mmcblk0p2
e2fsck /dev/block/mmcblk0p2
e2fsck 1.41.6 (30-May-2009)
e2fsck: Group descriptors look bad... trying backup blocks...
Superblock has an invalid journal (inode 8).
Clear<y>? n
no
e2fsck: Illegal inode number while checking ext3 journal for /dev/block/mmcblk0p2
I decided NOT to go through with clearing the journal, as I don't really understand what implications that would have.
UPDATE:
Actually, I could only do adb push for the fiiles parted et al. after I had rebooted into CWM Recovery. When I rebooted normally, now the files are gone. I suppose this has something to do with the fact that I am still S-ON, since when the adb push failed, I got a response like "... read-only file system"
More Info:
I just did adb pull /etc/fstab. It looks like this
Code:
/dev/block/mtdblock4 /cache yaffs2 rw
/dev/block/mtdblock5 /data yaffs2 rw
/dev/block/mtdblock3 /system yaffs2 rw
/dev/block/mmcblk0p1 /sdcard vfat rw
/dev/block/mmcblk0p2 /sd-ext auto rw
[SOLVED] kinda
LEARN BY DOING!!!
So, I got anxious and just went ahead with the e2fsck command from above.
There were a LOT of problems (so many I had to .zip the attachment, it was waay over the forum .txt size limit) But, probly the tool wasn't meant for ext4...? I know that the actual Linux version does support ext4, but this one...?
Anyway, see the attached log if you want to check out more details. I don't really know WHAT all happened, whether anything good or bad went down.
I haven't really "Learned" anything, but the problem is fixed, more or less. After doing e2fsck, I was able to do a Nandroid Restore, and the mmcblk0p2 problem(s) were gone.
Spoiler: Semi-related minutia
Of course, since I had been careless and not done a Backup in about a week, actually ended up restoring last weeks' backup, then restoring last nights' backup sans sd-ext, then doing dtapps2sd: repair, remove, reinstall, repair. Then some manual app reinstalls, a couple widgets, and some shortcuts. Overall, tho, I think I only lost one SMS through the whole deal.
ScottHW said:
LEARN BY DOING!!!
So, I got anxious and just went ahead with the e2fsck command from above.
There were a LOT of problems (so many I had to .zip the attachment, it was waay over the forum .txt size limit) But, probly the tool wasn't meant for ext4...? I know that the actual Linux version does support ext4, but this one...?
Anyway, see the attached log if you want to check out more details. I don't really know WHAT all happened, whether anything good or bad went down.
I haven't really "Learned" anything, but the problem is fixed, more or less. After doing e2fsck, I was able to do a Nandroid Restore, and the mmcblk0p2 problem(s) were gone.
Spoiler: Semi-related minutia
Of course, since I had been careless and not done a Backup in about a week, actually ended up restoring last weeks' backup, then restoring last nights' backup sans sd-ext, then doing dtapps2sd: repair, remove, reinstall, repair. Then some manual app reinstalls, a couple widgets, and some shortcuts. Overall, tho, I think I only lost one SMS through the whole deal.
Click to expand...
Click to collapse
hi, i'm facing problem more or less just like you. I'm trying using e2fsck but it keep saying the super block can not be read or does not describe a correct ext2 system.
do you have any idea?
semi-brick.
Linking the problems
Just trying to link the thread involving my problem issue to this one as both are similar.
http://forum.xda-developers.com/showthread.php?p=44617022#post44617022
e2fsck seems to be the key to solve it as S2E log could automatically solve it. S2E is not compatible with higher android version ROMs that's all.

Apps2SD on HTC Hero with default 2.1 ROM

Hi all, i've bought an HTC Hero with HTC's 2.1 ROM, and since it's still in warranty i don't want to flash it with a custom ROM now
I can't find a way to install apps on the SD, because all i find are cusom roms which already have apps2sd enabled...
What can i do if i want to keep my warranty?
Cero92 said:
Hi all, i've bought an HTC Hero with HTC's 2.1 ROM, and since it's still in warranty i don't want to flash it with a custom ROM now
I can't find a way to install apps on the SD, because all i find are cusom roms which already have apps2sd enabled...
What can i do if i want to keep my warranty?
Click to expand...
Click to collapse
no. you need root. If you like your warranty, and your phone gets broken in some way while rooting, you can just run the official RUU and return it back to stock state, and your provider will never know.
Cero92 said:
Hi all, i've bought an HTC Hero with HTC's 2.1 ROM, and since it's still in warranty i don't want to flash it with a custom ROM now
I can't find a way to install apps on the SD, because all i find are cusom roms which already have apps2sd enabled...
What can i do if i want to keep my warranty?
Click to expand...
Click to collapse
You can't enable app2sd without root, and if I am not mistaken, it's the rooting the will void your warranty....
I don't think you can mess with anything at the system level without voiding your warranty, which makes sense.
But, Andyt95 is right, if you mess something up, the RRU should restore it to the unrooted state.
I rooted it using this guide: http://forum.xda-developers.com/showthread.php?t=645253
I followed the first part up to the fourth point (i think recovery img is needed to flash, not to root, am i wrong?)
But, now?
ya recovery image needs when you want to flash something in your mobile . But to root your phone it don't need recovery
there are many apps out there which can give you root & most of them are compatible for Hero
Yes i rooted it
But what to do next to install apps on sd?
I can't find a tutorial, my mistake?
Cero92 said:
Yes i rooted it
But what to do next to install apps on sd?
I can't find a tutorial, my mistake?
Click to expand...
Click to collapse
You need to partition your card with a EXT 2 partition. Then install any custom ROM. Most support app2SD
nirmalv said:
You need to partition your card with a EXT 2 partition. Then install any custom ROM. Most support app2SD
Click to expand...
Click to collapse
Yes, but i'd like to jeep the default ROM for a while
Sent from my HTC Hero using XDA App
Cero92 said:
Yes, but i'd like to jeep the default ROM for a while
Sent from my HTC Hero using XDA App
Click to expand...
Click to collapse
The problem is, its not a simple update, it needs support in the kernel ramdisk, busybox installed and some scripts.
Usually I don't like to recommend the Darktremor app2sd, because its a bit too bloated in my eyes, and I don't like things which are so complicated I can't understand them (and I have tried, but he has so much script for a relatively simple task...).
Anyway in this case, I think its your only bet.
DO A NANDROID BACKUP BEFORE YOU TRY ANYTHING - ESPECIALLY THIS!
EDIT: Taking another look, even it (the Darktremor app2sd) does not seem to fix the kernel's ramdisk. You might want to test it after a nandroid backup on the odd chance I am wrong (i.e. if your original ROM does run the init.d scripts - mine did not). I am afraid if I am right, the only way you can keep the original ROM and enable app2sd, is if you unpack the kernel ramdisk and edit the init.rc to run the init.d scripts - which is a bit more complicated than it sounds, but not that hard if you have the proper background....
erasmux said:
The problem is, its not a simple update, it needs support in the kernel ramdisk, busybox installed and some scripts.
Usually I don't like to recommend the Darktremor app2sd, because its a bit too bloated in my eyes, and I don't like things which are so complicated I can't understand them (and I have tried, but he has so much script for a relatively simple task...).
Anyway in this case, I think its your only bet.
DO A NANDROID BACKUP BEFORE YOU TRY ANYTHING - ESPECIALLY THIS!
EDIT: Taking another look, even it (the Darktremor app2sd) does not seem to fix the kernel's ramdisk. You might want to test it after a nandroid backup on the odd chance I am wrong (i.e. if your original ROM does run the init.d scripts - mine did not). I am afraid if I am right, the only way you can keep the original ROM and enable app2sd, is if you unpack the kernel ramdisk and edit the init.rc to run the init.d scripts - which is a bit more complicated than it sounds, but not that hard if you have the proper background....
Click to expand...
Click to collapse
I'm down to give this a try, my girl wants the stock rom and a2sd. Dam cake eaters! but is there a process to follow with this? I'm good enough to follow a process but not create it for a2sd. Any links to reference??
da-pharoah said:
I'm down to give this a try, my girl wants the stock rom and a2sd. Dam cake eaters! but is there a process to follow with this? I'm good enough to follow a process but not create it for a2sd. Any links to reference??
Click to expand...
Click to collapse
why stock though? have you considered that villainrom 13 is just like stock but better and has apps2sd? it's a full HTC sense 2.1 rom but rooted with apps2sd and a few small additions to ensure it runs as fast as possible and gives as much room as possible and runs a custom kernel ***
and you can revert by flashing an RUU which is super easy to do (I've done it before for warranty reasons) and the RUU (stock rom) works exactly the same, in fact IS exactly the same except for the features you're asking for.
***(which is pretty much required for apps2sd unless you want to hack it for a while and know how to do it yourself (it's a lot to ask the devs here to tell you everything you need to do if you're not a kernel developer already imho and even then there isn't a guarantee you wont' mess up your phone's stock rom).
dkelley said:
why stock though? have you considered that villainrom 13 is just like stock but better and has apps2sd? it's a full HTC sense 2.1 rom but rooted with apps2sd and a few small additions to ensure it runs as fast as possible and gives as much room as possible and runs a custom kernel ***
and you can revert by flashing an RUU which is super easy to do (I've done it before for warranty reasons) and the RUU (stock rom) works exactly the same, in fact IS exactly the same except for the features you're asking for.
***(which is pretty much required for apps2sd unless you want to hack it for a while and know how to do it yourself (it's a lot to ask the devs here to tell you everything you need to do if you're not a kernel developer already imho and even then there isn't a guarantee you wont' mess up your phone's stock rom).
Click to expand...
Click to collapse
Hi I am trying to find the step by step guide about how to setup Apps2SD working. But having tough time. I have done this with my HD2 but cant find much help for Hero.
I have Recovery image flashed with 8GB (class 6) SD Card.
Next I am looking to partition the card from recovery, but what should be the swap size?
Once partitioned I will try flashing Villainrom 13 ROM.
Thanks
nbhor said:
Hi I am trying to find the step by step guide about how to setup Apps2SD working. But having tough time. I have done this with my HD2 but cant find much help for Hero.
I have Recovery image flashed with 8GB (class 6) SD Card.
Next I am looking to partition the card from recovery, but what should be the swap size?
Once partitioned I will try flashing Villainrom 13 ROM.
Thanks
Click to expand...
Click to collapse
Swap does not seem to work well for the hero, therefore most ROMs will not enable it and I use 0 for the swap size when partitioning. If you still prefer to reserve room for it use something like 32 or 64.
dkelley said:
why stock though? have you considered that villainrom 13 is just like stock but better and has apps2sd? it's a full HTC sense 2.1 rom but rooted with apps2sd and a few small additions to ensure it runs as fast as possible and gives as much room as possible and runs a custom kernel ***
and you can revert by flashing an RUU which is super easy to do (I've done it before for warranty reasons) and the RUU (stock rom) works exactly the same, in fact IS exactly the same except for the features you're asking for.
***(which is pretty much required for apps2sd unless you want to hack it for a while and know how to do it yourself (it's a lot to ask the devs here to tell you everything you need to do if you're not a kernel developer already imho and even then there isn't a guarantee you wont' mess up your phone's stock rom).
Click to expand...
Click to collapse
thanks for the reply! but to answer your in short, My girl doesnt speak geek and gets pissed right away when the ROM she uses acts up. So in short stock roms is whats she likes. I have been trying to convince her to do another ROM but she is hard headed. I think i'll just flash the villainrom 13 and tell her its stock lol. Thanks again i'll check it out!
Tried multiple attempts from scratch every time.
Attempt 1 - Failed
Partitioned my SD Card for EXT 2 (512MB).
Tried flashing of Villainrom 13 ROM along with Dalvik2SD patch.
Installed bunch of apps. Checked size of EXT2 partition. Nothing changed. Its still same size as it was before installing apps. System memory reduced from its original value.
Attempt 2 - Failed
Partitioned my SD Card for EXT 3 (512MB).
Tried flashing of Villainrom 13 ROM along with Dalvik2SD patch.
Installed bunch of apps. Checked size of EXT3 partition. Nothing changed. Its still same size as it was before installing apps. System memory reduced from its original value.
Any suggestions?
nbhor said:
Tried multiple attempts from scratch every time.
Attempt 1 - Failed
Partitioned my SD Card for EXT 2 (512MB).
Tried flashing of Villainrom 13 ROM along with Dalvik2SD patch.
Installed bunch of apps. Checked size of EXT2 partition. Nothing changed. Its still same size as it was before installing apps. System memory reduced from its original value.
Attempt 2 - Failed
Partitioned my SD Card for EXT 3 (512MB).
Tried flashing of Villainrom 13 ROM along with Dalvik2SD patch.
Installed bunch of apps. Checked size of EXT3 partition. Nothing changed. Its still same size as it was before installing apps. System memory reduced from its original value.
Any suggestions?
Click to expand...
Click to collapse
System memory is still reduced with app2sd, since the /data/data folder is not moved to the SD.
Assuming you have adb working, check these two commands:
Code:
adb shell df -h
adb shell ls -ld /data/app
If you think you still have a problem please post the result of these two commands.
erasmux said:
System memory is still reduced with app2sd, since the /data/data folder is not moved to the SD.
Assuming you have adb working, check these two commands:
Code:
adb shell df -h
adb shell ls -ld /data/app
If you think you still have a problem please post the result of these two commands.
Click to expand...
Click to collapse
Do I run this command in terminal emulator on droid or use droid explorer > Terminal Command?
Can Root Explorer help? I am getting adb permission denied from terminal emulator.
nbhor said:
Do I run this command in terminal emulator on droid or use droid explorer > Terminal Command?
Can Root Explorer help? I am getting adb permission denied from terminal emulator.
Click to expand...
Click to collapse
well, I actually meant connecting the device w/ a USB cable to your computer and then from a command prompt (i.e. start -> run -> "cmd") using the "adb.exe" utility that comes with the android SDK (under the tools folder)....
You can run the same commands in a terminal windows just without the "adb shell":
Code:
df -h
ls -ld /data/app
Only problem is that then it you can't copy paste your result here.
for the "df -h" command take note of the mount of your sdcard which should start like this line:
Code:
/dev/block/mmcblk0p2 720.9M 506.3M 178.0M 74% /sd-ext
I would assume that for you the mount point (last value) would be /system/sd.
next check the "ls -ld /data/app" and make sure it is linked to the same location, in my case it is:
Code:
lrwxrwxrwx 1 root root 11 Apr 20 09:59 /data/app -> /sd-ext/app
erasmux said:
well, I actually meant connecting the device w/ a USB cable to your computer and then from a command prompt (i.e. start -> run -> "cmd") using the "adb.exe" utility that comes with the android SDK (under the tools folder)....
You can run the same commands in a terminal windows just without the "adb shell":
Code:
df -h
ls -ld /data/app
Only problem is that then it you can't copy paste your result here.
for the "df -h" command take note of the mount of your sdcard which should start like this line:
Code:
/dev/block/mmcblk0p2 720.9M 506.3M 178.0M 74% /sd-ext
I would assume that for you the mount point (last value) would be /system/sd.
next check the "ls -ld /data/app" and make sure it is linked to the same location, in my case it is:
Code:
lrwxrwxrwx 1 root root 11 Apr 20 09:59 /data/app -> /sd-ext/app
Click to expand...
Click to collapse
My results from above 2 commands
C:\Program Files (x86)\Android\android-sdk\platform-tools>adb shell df -h
Filesystem Size Used Available Use% Mounted on
tmpfs 95.6M 0 95.6M 0% /dev
tmpfs 4.0M 0 4.0M 0% /sqlite_stmt_journals
/dev/block/mtdblock3 170.0M 162.8M 7.2M 96% /system
/dev/block/mtdblock5 165.8M 11.2M 154.5M 7% /data
/dev/block/mtdblock4 130.0M 58.8M 71.2M 45% /cache
/dev/block/mtdblock4 130.0M 58.8M 71.2M 45% /data/dalvik-cache
/dev/block//vold/179:1
6.8G 4.0G 2.8G 59% /sdcard
C:\Program Files (x86)\Android\android-sdk\platform-tools>adb shell ls -ld /data/app
drwxrwx--x 1 1000 1000 2048 Apr 22 01:34 ?[1;34m/data/app?[0m
nbhor said:
My results from above 2 commands
C:\Program Files (x86)\Android\android-sdk\platform-tools>adb shell df -h
Filesystem Size Used Available Use% Mounted on
tmpfs 95.6M 0 95.6M 0% /dev
tmpfs 4.0M 0 4.0M 0% /sqlite_stmt_journals
/dev/block/mtdblock3 170.0M 162.8M 7.2M 96% /system
/dev/block/mtdblock5 165.8M 11.2M 154.5M 7% /data
/dev/block/mtdblock4 130.0M 58.8M 71.2M 45% /cache
/dev/block/mtdblock4 130.0M 58.8M 71.2M 45% /data/dalvik-cache
/dev/block//vold/179:1
6.8G 4.0G 2.8G 59% /sdcard
C:\Program Files (x86)\Android\android-sdk\platform-tools>adb shell ls -ld /data/app
drwxrwx--x 1 1000 1000 2048 Apr 22 01:34 ?[1;34m/data/app?[0m
Click to expand...
Click to collapse
Well, you really do *not* have app2sd enabled (I am sorry for my previous disbelief but I have seen many users in the past which only thought they did not have app2sd enabled).
From your previous posts I understand you are using VR13, so either ask on the VR13 thread how to enable app2sd (you can post the above as proof it is not working for you), or change to a ROM with more "stable" app2sd....

[Q][S-ON] screwing around with Wildfire S

I posted this here - http://forum.xda-developers.com/showpost.php?p=18647176&postcount=14 - but never got an answer so I'm posting it to its own thread. I would post to the development section but apparently until I clutter up the place with 10 posts I'm considered a drooling idiot.
I was playing around and I noticed that the problem is with s-on I cannot write to /system meaning no superuser etc. So I remembered from way back when I started linux you could mount over a mounted folder. So I made a small file, put ext3 on on it, transferred it to the sdcard and mounted over /system with
mount -t ext3 -o rw,loop /mnt/sdcard/test.dump /system
it worked and then of course I lost all commands (ls, reboot...) in the shell.
Would it be possible to dump /system with "cat /dev/mtd/mtd3 > /mnt/sdcard/system.img", extract it, put it in an ext3 file, mount it as readable over system and just go to town?
Somebody MUST have tried this in the past. Before I go any further can anyone tell me why this wouldn't work and save me a few hours noodling around lol
baconbacon said:
I posted this here - http://forum.xda-developers.com/showpost.php?p=18647176&postcount=14 - but never got an answer so I'm posting it to its own thread. I would post to the development section but apparently until I clutter up the place with 10 posts I'm considered a drooling idiot.
I was playing around and I noticed that the problem is with s-on I cannot write to /system meaning no superuser etc. So I remembered from way back when I started linux you could mount over a mounted folder. So I made a small file, put ext3 on on it, transferred it to the sdcard and mounted over /system with
mount -t ext3 -o rw,loop /mnt/sdcard/test.dump /system
it worked and then of course I lost all commands (ls, reboot...) in the shell.
Would it be possible to dump /system with "cat /dev/mtd/mtd3 > /mnt/sdcard/system.img", extract it, put it in an ext3 file, mount it as readable over system and just go to town?
Somebody MUST have tried this in the past. Before I go any further can anyone tell me why this wouldn't work and save me a few hours noodling around lol
Click to expand...
Click to collapse
S-on itself got nothing to do with rooting. It just means you can't flash unsigned images as much as I know.
That system is mounted as ro is also at rooted phones the standard behaviour, you have to remount it as rw, but without root it won't accomplish I think.
Cat is for text files not for binaries or whole partitions, to extract the image use the dd command.
Do you have an /dev/mtd folder? My partitions are at /dev/block and there is no /dev/mtd present.
Swyped from my HTC Desire S
Tectas said:
S-on itself got nothing to do with rooting. It just means you can't flash unsigned images as much as I know.
That system is mounted as ro is also at rooted phones the standard behaviour, you have to remount it as rw, but without root it won't accomplish I think.
Cat is for text files not for binaries or whole partitions, to extract the image use the dd command.
Do you have an /dev/mtd folder? My partitions are at /dev/block and there is no /dev/mtd present.
Swyped from my HTC Desire S
Click to expand...
Click to collapse
This issue is that when you remount it as rw you cannot write to it. I want to know if I make my own partitions and mount them after boot if that will work, probably slower but work. This is so lojack I doubt it will work, I just want to know if anyone tried it.
Also "Cat is for text files not for binaries or whole partitions" is wrong, it works fine.
baconbacon said:
This issue is that when you remount it as rw you cannot write to it. I want to know if I make my own partitions and mount them after boot if that will work, probably slower but work. This is so lojack I doubt it will work, I just want to know if anyone tried it.
Also "Cat is for text files not for binaries or whole partitions" is wrong, it works fine.
Click to expand...
Click to collapse
Then it's not rw, because rw stands for read write, but like I said without root...
And no I think no one tried it before, because using an xtc-clip is compared to your solution much less work
But if you want to try it, do it and share your experiences, maybe it helps others
That cat works doesn't mean that it's made for it, you can also hunt for birds with a bazooka
Take a look at cat and dd and choose yourself.
Tectas said:
Then it's not rw, because rw stands for read write, but like I said without root...
And no I think no one tried it before, because using an xtc-clip is compared to your solution much less work
But if you want to try it, do it and share your experiences, maybe it helps others
That cat works doesn't mean that it's made for it, you can also hunt for birds with a bazooka
Take a look at cat and dd and choose yourself.
Click to expand...
Click to collapse
is xtc-clip better? yes, not arguing that. is cat is better then dd? no, I said cat works in this instance the same as dd, the results will be the identical.
I didn't ask this question to argue unrelated linux 101. I'm just going to look into this myself. iow screw you guys, im going home...
Dude, I use Linux too though I'm probably not a guru. I think I understand what you're saying... but if I do, aren't you just talking about editing a copy of /system? How would you mount your edited partition at boot?
Time permitting, I could try a few tricks but I'm not willing to risk bricking my phone though. I'd be stranded without it.
Sent from my HTC Wildfire S A510e using XDA App
First don't blame others, because of things I wrote.
I never said it couldn't work, I just wanted to show you that there are better ways to do it, cause cat also tries to interpret the file and not only copies it, what could mess up your image in some cases.
Also be aware that if your using the same data and cache partition with both of your systems, it could be easy bricked, if you change to much at your 2. system and remember that there aren't many ways left to get it working again cause your still s-on.
I think he wants to mount it himself every time after boot.
If he can root his 2. system (but all by hand, I think) he maybe can mount his 1. system as rw and also root it, but the chance that something goes wrong is pretty high, even mounting itself could freeze the device, cause the first system is still in memory.
I'm also not even close to be a Linux guru.
Swyped from my HTC Desire S

[Guide]Functional ext4 for external microSD with just a few bumps left

Y.G. said:
I formated my sd card to Ext4 and when insert it in to my phone, it says that's it's blank and has unsupported files. Any reasons for that?
Sent from my SPH-L710 using xda premium
Click to expand...
Click to collapse
The SPH-L710 Samsung Stock LJ7 TW 4.1.1 Android doesn't understand/support the change to ext4 external SD card (microSD) without a few things being done.
I'm working this out right now. So far I have manually been able to mount the newly created ext4 partition on the microSD card through adb, and after some chown/chmod I was able to go back to "Settings and Storage" and the "Mount SD Card" picked it up, and I was up and running ext4. But this didn't persist after a restart. So I'm looking into: /etc/vold.fstab MODS to keep it after restart right Now !!
If Some one else already has this perfected please chime in. I'm wanting to do most of the devices in the house this way when I get time because better performance, having a file system with a journal, and getting rid of thins like 4 Gig per file limitations is pretty Sweet in my humble opinion *Grin*
0) Assuming you already have your microSD card formatted ext4. I also happened to label mine extSdCard for the volume label within gparted
1) Can mount with:
mount -w -t ext4 /dev/block/mmcblk1p1 /storage/extSdCard/
2) To get the correct owner and permissions run:
chown root:sdcard_rw /storage/extSdCard
chmod 775 /storage/extSdCard
3) Should make the extSdCard owner/permissons match the regular internal sdcard you can verify this like so:
cd /storage/ && ls -l
drwxrwxr-x root sdcard_rw 2013-01-12 18:16 extSdCard
drwxrwxr-x root sdcard_rw 2013-01-12 17:05 sdcard0
4) After that you can go to the "Settings and Storage" to run "Mount SD" and you will have ext4 extSdCard Show up and it bring up the File System Status !! --> Until you reboot and it goes to crap because I don't have the vold.fstab edit/MOD complete _yet_ ... So, for now a boot script has been put in place to bring our external SD card back online during restart, so the system will acknowledges it, making the world a better place.
Example of how things look file system wise: mount | grep extSdCard
/dev/block/mmcblk1p1 /storage/extSdCard ext4 rw,relatime,user_xattr,barrier=1,data=ordered 0 0
5) Have not been able to resolve the vold.fstab to make this ext4 extSdCard matter fully Legit (in my opinion), but I did manage to make it remount the card on boot, so its online when the system comes up instead of having to manually mount it. Did this by -->
Added the following lines to the very bottom of: /etc/init.qcom.post_fs.sh
## sponix MOD to match with ktoonz kernel for better power management
stop mpdecision
## sponix MOD to mount extSdCard prior to GUI work around to make ext4 function
## read and write extSdCard mount
chown root:sdcard_rw /storage/extSdCard
chmod 775 /storage/extSdCard
mount -w -t ext4 /dev/block/mmcblk1p1 /storage/extSdCard
chown root:sdcard_rw /storage/extSdCard
chmod 775 /storage/extSdCard
## if you want read only extSdCard mount
## mount -r -t ext4 /dev/block/mmcblk1p1 /storage/extSdCard
Still attempting to automate the process so the Stock+root LJ7 can pick up the extSdCard _normally_ without having to do the mount command manually, but so far its kicking my butt. Also this is more a "General, or Question and Answer type Topic" the Kernel(s) obviously support ext4 the system fs uses/requires it *Grin*.. So we might get Our Friendly Neighborhood Moderator to Migrate it to the proper place to help others. Just hoping to get the last few bumps smoothed out, or find someone that already documented the process that I've overlooked *Grin*..
Current Known Issues: If you unmount the card through the "Settings | Storage | Umount SD" or by hand with umount, you will either need to reboot for it to reattach through the /etc/init.qcom.post_fs.sh boot script script addition, or will have to mount it manually if you want to keep the system up and running. Guess you could also probably just run the /etc/init.qcom.post_fs.sh as root from a terminal emulator (or adb).
Still searching for vold.fstab bits of wisdom but that will have to continue next weekend -->
Sexy and You Know it,
Keep on Flashing,
sponix2ipfw (sponix
:fingers-crossed:
Ha! Sorry. Deleted: Didn't understand that you had it running on boot (can't read properly )
Great idea
Am I really the only one who also thinks this idea is the nuts?
Am I the only one who longs to transform the mess that passes for a filing system on the internal sd using symbolic links into a beautifully organized, encrypted and cloud synced system on my external sd?
Is it just me and a few others that want to be able to achieve the above so that we can move from one ROM to another or recover from a lost phone with the minimum of fuss?
Are we freaks? :cyclops:
Say it isn't so XDA!! :crying:
I'm gonna try this on my international S3 running Null_ Rom 25 JB 4.1.2
PS do you have any idea how the entire ExtSD or just a folder can be enrypted using Cryptonite and automatically mounted at boot time?
emp111 said:
PS do you have any idea how the entire ExtSD or just a folder can be enrypted using Cryptonite and automatically mounted at boot time?
Click to expand...
Click to collapse
Is this along the lines of what you're looking for?
http://forum.xda-developers.com/showthread.php?t=1141467
Also your idea is pretty insane, but also genius
If you get that to work please do come back and share
Insane ideas are the best lol
CNexus said:
Is this along the lines of what you're looking for?
http://forum.xda-developers.com/showthread.php?t=1141467
Also your idea is pretty insane, but also genius
If you get that to work please do come back and share
Click to expand...
Click to collapse
Thank you for your prompt reply, yes it is asking a lot I know but I think that it can be done.
Now if you really thought that idea was insane......check this out:
Imagine that we asked every Android app developer to submit the various paths used for their config (and config backup) files to a central database and had the ability to add or own custom paths (which could be added to the central database once approved).
We could build an script/app that would retrieve a list of currently installed apps on your phone then automatically build a symbolically linked file system (and/or backup file system) in the location of your choice that you could either encrypt and/or sync using your current tools or even incorporate this functionality into the app itself along with the ability to choose what was encrypted/backed up and how i.e. either synced to the Cloud or (S)FTP or SMB as either a dd copy or even a cwm flashable zip.
Could I dare hope for a Tasker module or the ability to add custom scripts?
I wish I could do this myself but my coding skills are non existent
Anyway the LUKS manager app won't automatically mount a file system, but I really like it anyways, thank you for pointing me to it!
And on the Ext4 front, the mount command (yes the 1st one ) failed, maybe the op could offer a suggestion. :angel:
BTW is there a place for people to suggest ideas for apps here?
Wait really it wont? I couldve sworn I remembering that it did
But dude....
You need to learn yourself some java and start whipping stuff up
Idk about the whole central database thing, but the rest could definitely be done with root access
I think the main problem with that is the proprietary aspects...i mean even here on XDA where binaries released are supposed to be GPL compliant, many of them arent and its sad because it deteriorates the overall quality of work thats released afterward
This whole thing is just hard work!
CNexus said:
Wait really it wont? I couldve sworn I remembering that it did
Click to expand...
Click to collapse
Doesn't seem to unfortunately
But dude....
You need to learn yourself some java and start whipping stuff up :D :D[/QUOTE said:
You make it sound soooo easy lol, and at another point in my life maybe it would have been but right now I'm operating at a reduced level due to some unforeseen circumstances that have left me lacking focus, motivation etc
You know all the things you need to be creative, learn etc lol
Anyway back to the matter at hand, I have got my ext4 SD card to the stage where I have to manually mount it from within the Settings/Storage as I'm using the international S3 and don't have the init.qcom.post_fs.sh, I think the qcom refers to Qualcomm chipset in US S3's.
As for modifying vold.fstab so we can avoid the above workaround it would seem that maybe thats a dead end as according to a German guy on android-hilfe. de, Vold may have been modified by Samsung to only deadl with exFAT on External SD's.
Looks like I'm not gonna be in Android nirvana for a while :crying:
Unless anyone else on XDA fancies getting in on this !!!!
Click to expand...
Click to collapse
Got it working ..... kinda
Got an app called ezymount (by ezynow) that automounts my ext4 64GB microSD at boot time.
I have to wait a few seconds for the boot process to complete but it's automatic, am pretty happy!!
Now gotta get symlinks, encryption and cloud synchronization sorted :/

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