Related
Ok, I posted this question in 2 other threads that had info on the process (will delete the posts when this one goes live), but no responses after a couple of days. One of them is old though.
I have TWRP 2.1.1 installed. ADB seems to be working normally. Superuser is working fine after booting to android. I'm running a custom ICS ROM (Energy); read that stock ROM can cause issues repartitioning.
I started with this How-to as it looked very straight forward.
I start throwing the commands at ADB and here's what I got for my efforts:
Code:
C:\Program Files (x86)\Android\android-sdk\platform-tools>adb shell
~ # su
su
/sbin/sh: su: not found
~ # cd /data
cd /data
/data # ls
ls
/data #
decided to go ahead and check the mount command:
Code:
~ # mount
mount
rootfs on / type rootfs (rw)
tmpfs on /dev type tmpfs (rw,relatime,mode=755)
devpts on /dev/pts type devpts (rw,relatime,mode=600)
proc on /proc type proc (rw,relatime)
sysfs on /sys type sysfs (rw,relatime)
~ #
and parted just for giggles:
Code:
~ # parted /dev/block/mmcblk0
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
print
print
Model: MMC MMC08G (sd/mmc)
Disk /dev/block/mmcblk0: 7818MB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Number Start End Size File system Name Flags
1 131kB 262kB 131kB xloader
2 262kB 524kB 262kB bootloader
3 524kB 11.0MB 10.5MB dkernel
4 11.0MB 212MB 201MB ext4 dfs
5 212MB 229MB 16.8MB recovery
6 229MB 296MB 67.1MB ext4 backup
7 296MB 307MB 10.5MB boot
8 307MB 312MB 5243kB ext4 splash
9 312MB 849MB 537MB ext4 system
10 849MB 2041MB 1192MB ext4 userdata
11 2041MB 2309MB 268MB ext4 cache
12 2309MB 7690MB 5380MB fat32 media
(parted)
Ok, so that much worked. Now I tried to shrink 12 so I could double the size of 9. I want to get Switchme set up for his/her profiles and 500MB just isn't going to cut it.
That's when I hit a brick wall:
Code:
(parted) resize 12 2846 7690
resize 12 2846 7690
resize 12 2846 7690
Error: Unable to satisfy all constraints on the partition.
(parted)
One thing that jumps out at me right away is this:
Code:
adb shell
~ # su
su/sbin/sh: su: not found
It seems you are not actually rooted.
To check, enter:
Code:
adb shell
ls /system/xbin
If you don't see "su" in the list, then you don't have root permissions, which would probably prevent you from doing what you need to accomplish.
That's what I was wondering, but apps are able to ask for and receive root permission from within the ROM. SU does exist, just not where the shell is looking when in recovery.
Code:
C:\Program Files (x86)\Android\android-sdk\platform-tools>adb shell
~ # ls /system/xbin
ls /system/xbin
ls: /system/xbin: No such file or directory
~ #
I did an ls /system/xbin from adb shell and from Terminal Emulator within Android and both returned a long list containing SU.
TWRP provides an unsecured (unsecure? insecure?) boot. Whatever the terminology, it gives you immediate access to root privileges. Apparently CWMR (which was used in the OP of the thread you used) does not and so that author had to use su. For TWRP, it's not necessary and not even available. You already have root privileges as indicated by the hash prompt.
I tried resizing my /sdcard partition and it worked fine with the command you tried. I'm not sure what's going on with your storage device that it wouldn't resize it for you. At first I thought it might be mounted, but your mount command shows otherwise and parted gave me a different error when I had it mounted.
I don't know if this is going to help you, but you might try giving it the "MB" suffix in your numbers....
Code:
resize 12 2846MB 7690MB
Maybe even try changing units to bytes and giving the resize command byte sized boundaries.
Code:
unit B
print
will show you the numbers in bytes and you'd have to use the "B" suffix as in the "MB" example above.
If none of that works, you can always remove and remake the partition. For example...
Code:
rm 12
mkpartfs primary fat32 <start> <end>
name 12 media
You'd obviously need to insert acceptable boundaries for the start and end into that command. It might even be easier to just remove all 9, 10, 11, and 12 and remake/rename them, but remember 9, 10, and 11 are ext4 filesystems so the above mkpartfs command needs to be tweaked accordingly.
One thing I noticed while I was experimenting with the partition table this morning... all of the existing partitions have been allocated in 128MB chunks. I have no idea if this affects performance. I'd imagine you'd only need to stick to the 512B sector sizes, but you might want to stay with those conventions if it's not too inconvenient for you.
If you mess up the partition table, you can always go back to fastboot mode in FFF and use the...
Code:
fastboot oem format
feature to bring your partition table back to stock.
Good luck.
Wow, excellent response. Just the kind of detail I was hoping to get and it confirmed a few suspicions I had while searching the kindle threads. I'll report back on my degree of success when I get some free time to tinker.
I have a nandroid backup (also saved to PC) just in case and saved the partition table as-found. If everything gets hosed and I do an oem format I can just restore that and go or try from square one again, yes?
Sent from my TBolt with the XDA App using 1 opposable thumb
ProfEngr said:
Wow, excellent response. Just the kind of detail I was hoping to get and it confirmed a few suspicions I had while searching the kindle threads. I'll report back on my degree of success when I get some free time to tinker.
I have a nandroid backup (also saved to PC) just in case and saved the partition table as-found. If everything gets hosed and I do an oem format I can just restore that and go or try from square one again, yes?
Sent from my TBolt with the XDA App using 1 opposable thumb
Click to expand...
Click to collapse
I'd say that's a safe bet. Just be very careful about handling partitions 1 and 2 because those two are critical to getting anything to boot on your device. As long as you don't touch the xloader in partition 1 and have FFF installed in partition 2, you can rebuild the rest of it.... in theory. I only say "in theory" because I've never actually had to do it, but I don't see why it wouldn't work.
A couple of additional things I figured out after you put me to work with parted....
It looks like parted doesn't know how to make an ext4 filesystem, so mkpartfs balks if you tell it to make one. You'll have to use mkpart which just makes the partition, but not the filesystem. Then exit out of parted and use mke2fs, which despite its name knows how to make an ext4 filesystem. Like this for the cache partition...
Code:
mke2fs -T ext4 /dev/block/mmcblk0p11
The other thing is that parted sets a "msftres" flag on the fat32 filesystem it makes. The flag apparently is to tell the OS that it's reserved for Windows, or something like that. I didn't have a problem mounting in Linux and MacOS X, but the stuff I've read seems to indicate that older OS's have a problem with it. Unfortunately, the version of busybox on TWRP doesn't have a module to make a fat32 filesystem. I'm looking around to see how to get around that.
In any case, this should get you most of the way there. I'll followup if I find something out.
Ok. I used to run n*x, but use only M$ right now. Haven't touched a 'mac' since Jr High (IIgs)
Sent from my TBolt with the XDA App using 1 opposable thumb
ProfEngr said:
Ok. I used to run n*x, but use only M$ right now. Haven't touched a 'mac' since Jr High (IIgs)
Sent from my TBolt with the XDA App using 1 opposable thumb
Click to expand...
Click to collapse
I have a IIgs sitting in the basement... but it's not a mac, it's an Apple ][.
Found the last piece...
Code:
/system/bin/newfs_msdos /dev/block/mmcblk0p12
will make a fat32 filesystem correctly. I think that's all you'll need.
EDIT: OK, I must have been half asleep when I posted the above. That binary is on the stock system software I had mounted. There's nothing on TWRP to create a fat32 filesystem correctly.
Yeah, ][e was my first computer that didn't crash at the drop of a keystroke. Had an Adam tape drive model, but it froze up constantly.
Sent from my TBolt with the XDA App using 1 opposable thumb
So, I met with success following the repartition thread and tweaking it with your suggestions. I didn't quite move and many MB around as I thought, but it was enough to move me a little farther down the road with SwitchMe. At least it doesn't tell me I don't have enough memory for a 2nd profile now.
I still think it has issues with ICS or EnergyROM itself. When I created a new profile and rebooted to it I was stuck on Nova launcher instead of GO like the main profile. Strange.
I'll consider this thread to have fulfilled its usefulness. Thanks again for the help.
no device found
ProfEngr said:
So, I met with success following the repartition thread and tweaking it with your suggestions. I didn't quite move and many MB around as I thought, but it was enough to move me a little farther down the road with SwitchMe. At least it doesn't tell me I don't have enough memory for a 2nd profile now.
I still think it has issues with ICS or EnergyROM itself. When I created a new profile and rebooted to it I was stuck on Nova launcher instead of GO like the main profile. Strange.
I'll consider this thread to have fulfilled its usefulness. Thanks again for the help.
Click to expand...
Click to collapse
I get
(parted)
Error: No device found
Retry/Cancel
Hi
this is from the BoardConfig.mk
Code:
# fix this up by examining /proc/mtd on a running device
BOARD_BOOTIMAGE_PARTITION_SIZE := 0x105c0000
BOARD_RECOVERYIMAGE_PARTITION_SIZE := 0x105c0000
BOARD_SYSTEMIMAGE_PARTITION_SIZE := 0x105c0000
BOARD_USERDATAIMAGE_PARTITION_SIZE := 0x105c0000
BOARD_FLASH_BLOCK_SIZE := 131072
I want to find the actual size partition adb shell cat /proc/mtd" or "adb shell cat /proc/emmc" or "adb shell cat /proc/dumchar_info" doesn't work !
Steps:
*root your device;
*install TWRP or CWM for your device ;
*install busybox tools ( Busybox Free Goolge Play);
After this, enter to recovery mode. Mount /system into TWRP or CWM.
Plug USB cabe, and in your computer input these commands:
adb devices --> verify if device is connected
Now, install parted into /system/bin:
adb push <path-to-file>/parted /system/bin
Now, insert this command:
parted /dev/block/mmcblk0 unit B print
The output is similar :
Code:
~ # parted /dev/block/mmcblk0 unit B print
Model: MMC 008GE0 (sd/mmc)
Disk /dev/block/mmcblk0: 7818182656B
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Number Start End Size File system Name Flags
1 4194304B 6291455B 2097152B MRD
2 6291456B 8388607B 2097152B MRD_BK
3 8388608B 10485759B 2097152B MEP2
4 10485760B 31457279B 20971520B ext4 EFS
5 31457280B 46137343B 14680064B Reserved
6 46661632B 48234495B 1572864B LOKE_2ND
7 48758784B 50331647B 1572864B LOKE_1ST
8 50331648B 67108863B 16777216B PARAM
9 67108864B 83886079B 16777216B RECOVERY
10 83886080B 100663295B 16777216B KERNEL
11 100663296B 125829119B 25165824B MODEM
12 125829120B 142606335B 16777216B ext4 NVM
13 142606336B 352321535B 209715200B ext4 HIDDEN
14 352321536B 713031679B 360710144B ext4 CACHE
15 713031680B 2307915775B 1594884096B ext4 SYSTEM
16 2307915776B 7817134079B 5509218304B ext4 USER
Use the column size to fill in the BoardConfig values.
The first column it refers to the mount point.
Ex.: the kernel partition has 16.777.216 bytes mounted in /dev/block/mmcblk0p10
Links references:
http://forum.xda-developers.com/showthread.php?t=2450045
http://stackoverflow.com/questions/...ormation-for-android-device/15639867#15639867
http://forum.xda-developers.com/attachment.php?attachmentid=2397268&d=1384688569
naufragoweb said:
Now, install parted into /system/bin:
adb push <path-to-file>/parted /system/bin
Click to expand...
Click to collapse
Path to.. what file?
Nicofisi said:
Path to.. what file?
Click to expand...
Click to collapse
Path to the "parted" file in your PC
Hi everybody,
I'm in deep troubles with my nexus (maguro).
Yesterday, it started to reboot after showing for about 5-10 seconds the lock screen.
the phone is rooted, Iand the last rom (cyanogenmod) was running stable in the last 6 months.
twrp 2.8.0.1 was installed, so I Rebooted to fastboot to flash the 2.8.6.0.
And then the weird part begins:
it's like every partition is read only, but from the mount command it doesn't look like it.
flashing the new recovery is a success, but after reboot the 2.8.0.1 is still there.
factory reset successful, and everything is like before.
wiping sdcard, nothing happens.
if I try to create a backup in twrp, it fails after 20 seconds or so. (I've copied everything to the pc using the pull command in adb).
Try to fix or to change the partitions filesystem in twrp doesn't change anything.
I tried also to change the file system in parted, through the adb shell,this happens:
Code:
~ # ←[6nparted /dev/block/mmcblk0p12 mkfs ext2
parted /dev/block/mmcblk0p12 mkfs ext2
Warning: The existing file system will be destroyed and all data on the
partition will be lost. Do you want to continue?
parted: invalid token: ext2
Yes/No? yes
yes
yes
Partition number? 1
1
1
File system type? [ext2]?
Error: File system was not cleanly unmounted! You should run e2fsck. Modifying
an unclean file system could cause severe corruption.
Ignore/Cancel? i
i
i
Error: File system has an incompatible feature enabled. Compatible features are
has_journal, dir_index, filetype, sparse_super and large_file. Use tune2fs or
debugfs to remove features.
You found a bug in GNU Parted! Here's what you have to do:
Don't panic! The bug has most likely not affected any of your data.
Help us to fix this bug by doing the following:
Check whether the bug has already been fixed by checking
the last version of GNU Parted that you can find at:
...
Please check this version prior to bug reporting.
If this has not been fixed yet or if you don't know how to check,
please visit the GNU Parted website:
...
for further information.
Your report should contain the version of this release (1.8.8.1.179-aef3)
along with the error message below, the output of
parted DEVICE unit co print unit s print
and the following history of commands you entered.
Also include any additional information about your setup you
consider important.
Error: SEGV_MAPERR (Address not mapped to object)
Aborted
and of course nothing changes.
so, I have access to adb in recovery and to fastboot, there is a way to wipe completely the filesystem and start from scratch, or load a different kernel, that would help?
If I send with adb push a new rom to the sdcard, twrp fails and at the next reboot the files disappear.
this is my mount result:
Code:
~ # ←[6nmount
mount
rootfs on / type rootfs (rw)
tmpfs on /dev type tmpfs (rw,seclabel,nosuid,relatime,mode=755)
devpts on /dev/pts type devpts (rw,seclabel,relatime,mode=600)
proc on /proc type proc (rw,relatime)
sysfs on /sys type sysfs (rw,seclabel,relatime)
selinuxfs on /sys/fs/selinux type selinuxfs (rw,relatime)
tmpfs on /tmp type tmpfs (rw,seclabel,relatime)
/dev/block/mmcblk0p11 on /cache type ext4 (rw,seclabel,relatime,user_xattr,barri
er=1,data=ordered)
/dev/block/mmcblk0p12 on /data type ext4 (rw,seclabel,relatime,user_xattr,barrie
r=1,data=writeback)
/dev/block/mmcblk0p12 on /sdcard type ext4 (rw,seclabel,relatime,user_xattr,barr
ier=1,data=writeback)
/dev/block/mmcblk0p10 on /system type ext4 (rw,seclabel,relatime,user_xattr,barr
ier=1,data=ordered)
and remounting in rw the partitions has no effect.
Even the parted, e2fsck, etc files disappear from /sbin after each reboot.
thank you
edit:
Having a second nexus, I could take a look at the partitions, and the difference seems to be the data=writeback options.
I'm looking for a procedure to make them "ordered" as the other phone.
edit2:
Code:
/tmp # ←[6ntune2fs -l /dev/block/mmcblk0p12 | grep features
tune2fs -l /dev/block/mmcblk0p12 | grep features
__bionic_open_tzdata: couldn't find any tzdata when looking for localtime!
__bionic_open_tzdata: couldn't find any tzdata when looking for GMT!
__bionic_open_tzdata: couldn't find any tzdata when looking for posixrules!
Filesystem features: has_journal ext_attr resize_inode filetype needs_recov
ery extent sparse_super large_file
/tmp # ←[6ne2fsck -f /dev/block/mmcblk0p12
e2fsck -f /dev/block/mmcblk0p12
e2fsck 1.42.9 (28-Dec-2013)
/dev/block/mmcblk0p12: recovering journal
Superblock needs_recovery flag is clear, but journal has data.
Run journal anyway<y>? y
y
yes
e2fsck: unable to set superblock flags on /dev/block/mmcblk0p12
/dev/block/mmcblk0p12: ********** WARNING: Filesystem still has errors *********
*
/tmp #
/tmp # ←[6ntune2fs -O ^has_journal /dev/block/mmcblk0p12
tune2fs -O ^has_journal /dev/block/mmcblk0p12
tune2fs 1.42.9 (28-Dec-2013)
The needs_recovery flag is set. Please run e2fsck before clearing
the has_journal flag.
Stuck here at the moment, cannot set superblock flags..
edit3:
Tested every possible superblock position, no luck.
I'm starting to think that the internal memory could be dead, but the phone in fastboot and recovery mode works fine.
I forgot to say that I've tried also the fastboot -w command, it works a lot (about 270 seconds) but no effect.
[How to] determine dd parameters for all LG G4 models
IMPORTANT:
Only for advanced users!
You are an advanced user if you know exactly what you are doing.
You are an advanced user if you know what to do if something went wrong.
You are NOT an advanced user if you know how to do copy+paste.
You can bring your smartphone into a state, so it no longer works.
I am not responsible for anything. The following instructions are only suggestions.
Hello,
everyone knows how to root the LG G4 with the "low effort root" method.
They copied the system partition to an ".img" file, rooted it and copied it back to the "system" partition.
Many users wonder how to get the right parameters for the "dd" commands.
Please read the complete guide and be sure that you understand it until you execute a command!
Information:
Code:
dd if=/inputfile bs=8192 count=12345 of=/outputfile
if = Input File
of = Output File
bs = Blocksize in bytes (default is 512 - to increase copy speed use multiple of 512 e.g. 8192)
count = how many blocks
skip = skip blocks before start reading
seek = skip blocks before start writing
more info: http://man7.org/linux/man-pages/man1/dd.1.html
There are different models of the LG G4 on the market.
We know that the system partition is different depending on the model of the G4.
As an example I will show you how to calculate the parameters for the LG G4 H815 (International Model).
What you need:
Windows with Send_Command.exe
Instructions:
At first we need to know where the "system" partition starts (first sector) and how big it is (partition size).
I used the first method to find these values. But I recommend the second method because it's easier.
First method (difficult method, extracting the GPT and using "gdisk" in linux to read the partition info)
What you need:
Linux with "gdisk" installed
Instructions:
Put your smartphone to "Download Mode" and connect it to the Send_Command.exe command prompt.
We need to copy the partition table to the internal storage.
The partition table of GPT (GUID Partition Table) has a size of 16384 bytes and starts at LBA2.
Each LBA has a size of 512 bytes. Because we start at LBA0 we need to add 1024 bytes.
In summary 16384 + 1024 = 17408 (bytes).
Execute the following command:
Code:
dd if=/dev/block/mmcblk0 bs=1 count=17408 of=/data/media/0/gpt_backup.img
Enter "LEAVE" to restart your phone.
You will find the (very small) file "gpt_backup.img" on your internal storage.
Switch to Linux:
Copy the file to your Linux and open the terminal. Then type this:
Code:
gdisk /yourpath/gpt_backup.img
Some warnings will occur. Ignore them.
You will see:
Code:
Command (? for help):
Enter "p" and hit "enter".
You will get a list of the partitions.
Scroll up a bit and check that you see:
"Logical sector size: 512 bytes"
Scroll down and look for the "system" partition.
You will find a line similar to this:
Code:
47 884736 9363455 4.0GiB FFFF system
Now you know the number of the "system" partition is "47".
You will see:
Code:
Command (? for help):
Type "i" and hit "enter".
You will be asked the partition number.
Enter it and hit "enter".
You will see something conatining lines similar to this:
Code:
First sector: 884736
Last sector: 9363455
Partition size: 8478720
Partition name: 'system'
We need the values from "First sector" and "Partition size".
Second method (easier method, just using "adb shell" to read the partition info)
What you need:
adb shell
usb debugging enabled
To get the "logical sector size" use:
cat /sys/block/mmcblk0/queue/logical_block_size
It should be 512
smason said:
To find in any smartphone the offset and the size of /system:
$ adb shell
[email protected]:/ $ ls -la /dev/block/bootdevice/by-name/system
ls -la /dev/block/bootdevice/by-name/system
lrwxrwxrwx root root 2015-01-02 10:50 system -> /dev/block/mmcblk0p47
[email protected]:/ $ cd /sys/block/mmcblk0/mmcblk0p47
cd /sys/block/mmcblk0/mmcblk0p47
[email protected]:/sys/block/mmcblk0/mmcblk0p47 $ cat start
cat start
884736
[email protected]:/sys/block/mmcblk0/mmcblk0p47 $ cat size
cat size
8478720
[email protected]:/sys/block/mmcblk0/mmcblk0p47 $
so:
offset = 512 * 884736 = 452984832
partition size = 512 * 8478720 = 4341104640
Cheers!
Click to expand...
Click to collapse
So "first sector" is the value from "cat start" (884736).
The "partiton size" is the value from "cat size" (8478720).
Now the mathematics (using the values from above):
Logical sector size = 512 (I never saw something different on LG G4 smartphones)
Assuming bs=8192
skip and seek: "First sector" * "Logical sector size" / bs
884736 * 512 / 8192 = 55296
count: "Partition size" * "Logical sector size" / bs
8478720 * 512 / 8192 = 529920
That was an example for the H815 (International Model).
Use your own values to calulate the "dd" parameters!
Back to Windows:
Put your smartphone to "Download Mode" and connect it to the Send_Command.exe command prompt.
Now you can copy your "system" partition to "system.img" with the following command:
Code:
dd if=/dev/block/mmcblk0 bs=8192 skip=55296 count=529920 of=/data/media/0/system.img
Replace the values with the ones you calculated for your model!
Now you could copy the "system.img" to your Linux and root it or do everything else you want.
Important: Do NOT delete the original "system.img" from your internal storage as long as you are not 100% sure your G4 is stable.
If your modifications don't work, you can copy back the original "system" partition (with "dd").
To copy the modified "system_changed.img" back to the "system" partition use the following command:
Code:
dd if=/data/media/0/system_changed.img bs=8192 seek=55296 count=529920 of=/dev/block/mmcblk0
Replace the values with the ones you calculated for your model!
Important: Be sure to use "skip" when reading and "seek" when writing.
The "dd" command should take about a minute.
Did the instructions help you?
Please give a "Thanks!"
Thank you
Hi,
thanks for this great post.
I just have one question. With your formulas and using 8K block size, I get a floating point number as result. So I used a block size of 4K instead, and I get an even number. This seems better to me so I went with it, as I believe smaller block sizes are always ok?
I'm just wondering one thing which seems not right to me. My system partition is reported to be 2.5GB:
Partition number (1-42): 39
Partition GUID code: EBD0A0A2-B9E5-4433-87C0-68B6B72699C7 (Microsoft basic data)
Partition unique GUID: A8725BAA-9E45-B2F8-8FA3-8C972F60F0CF
First sector: 836608 (at 408.5 MiB)
Last sector: 6074573 (at 2.9 GiB)
Partition size: 5237966 sectors (2.5 GiB)
Attribute flags: 1000000000000000
Partition name: 'system'
So with the formulas:
FACTOR 512 / 4096 = 0.125
skip and seek: "First sector" * "Logical sector size" / bs
836608 *FACTOR = 104576
count: "Partition size" * "Logical sector size" / bs
8478720 * FACTOR = 1059840
If I now run the dd command:
dd if=/dev/block/mmcblk0 bs=4096 skip=104576 count=1059840 of=/storage/external_SD/system.img
I get a file system.img which is 4096 MB. Should it not be 2.5GB as my original system partition?
If I use bs=512 (the default) and type
dd if=/dev/block/mmcblk0 bs=512 skip=836608 count=8478720 of=/storage/external_SD/system.img
I get a system.img of the right size (bit over 2.5GB).
I think the block size to use for "skip" is to be specified with the option ibs=XXX, not bs=XXX which only applies to "count" (according to man dd). I tried the ibs option, but the command then just doesn't work on Send_Command.exe. It doesn't even print an error but simply returns immediately.
Cheers
Jen
Hi,
which phone do you have?
Your calculation seems wrong. It's ok to use BS with 4k. I could be a bit slower then 8k, but that doesn't matter.
BUT: Look at your "count" value. Your partition size is 5237966. You used 8478720 (the value from my G4(H815EU) example). Thats wrong!!!
How to calculate with 1k and your values:
bs=1024
skip=836608*512/1024=418304
count=5237966*512/1024=2618983
Please check my calulation!!!
It's interesting, that the Send_Command shell has access to your external sd card...
I think the block size to use for "skip" is to be specified with the option ibs=XXX, not bs=XXX which only applies to "count" (according to man dd).
Click to expand...
Click to collapse
No. "bs" is the right parameter.
If you use "bs" it sets "ibs" and "obs" to the value of "bs".
Just do "dd --help" on a linux system for more details.
Hi Dominik,
oh my, how embarrassing I actually did take the wrong value from the example you posted. I used my value (the 5237966) for calculating the parameters with bs=8K, and got a floating value, so tried 4K instead... and the wrong value must have snug in. Oups.
I also get floating value on 4K now that you've pointed my mistake out:
5237966 * 512/4096= 654745.75
If I rounded this up, would this not mean that I copy a tiny bit of the next partition on the image? And if I then use the image to restore, would I not run the risk to damage something in the following partition?
Anyway, it's not a huge drama as I can just use bs=512 and it works.
Yes I have access to the SD card, the image also has copied there successfully. I was also surprised because I read in the forums that it's not possible.
I found it out with the "df" command, as the SD was listed there. I needed to use it because there's no room on my internal storage (it's a ridiculous 8GB on the LG H735) to store the image there.
My system partition is only 2.5GB so I don't think I have to reformat, but you are right it would be better to use ext4.
Ok
I removed my information about formatting the sd card.
You dont't have to format it. FAT32 is ok.
So you can use your sd card on systems which don't support ext4 too.
I have the LG G4S (H735). It's unusable without rooting as it only has 8GB internal memory. That's why I'm trying to root it now.
jen.magnolis said:
I have the LG G4S (H735). It's unusable without rooting as it only has 8GB internal memory. That's why I'm trying to root it now.
Click to expand...
Click to collapse
Ok, good luck.
Please open a new thread if you have questions about rooting your phone.
Or is there already one? Maybe these?
http://forum.xda-developers.com/g4/help/rooting-lg-h735-g4-beat-t3192491
http://forum.xda-developers.com/g4/general/lg-g4s-world-root-lg-devices-t3231759/page7
Oh. Just saw that you are already there
dominik-p said:
Ok, good luck.
Please open a new thread if you have questions about rooting your phone.
Or is there already one? Maybe these?
http://forum.xda-developers.com/g4/help/rooting-lg-h735-g4-beat-t3192491
http://forum.xda-developers.com/g4/general/lg-g4s-world-root-lg-devices-t3231759/page7
Oh. Just saw that you are already there
Click to expand...
Click to collapse
I just created a new thread too to focus on the particular problem I have:
http://forum.xda-developers.com/g4/general/rooting-lg-g4s-h735-t3243549
this guide helped in dumping boot and recovery partitions.
thank you very much sir! i successfully dumped my boot and recovery partition using dd in my mediatek device by following your guide.
sparksthedev said:
thank you very much sir! i successfully dumped my boot and recovery partition using dd in my mediatek device by following your guide.
Click to expand...
Click to collapse
Congratulations
Did you use the first (more komplex) oder the second method for your device?
I saw that you had problems in this thread:
http://forum.xda-developers.com/showthread.php?p=65907557#post65907557
And you wrote a guide for MTK devices here:
http://forum.xda-developers.com/general/general/guide-dumping-boot-img-recovery-img-t3339530
This doesn't work with the LG G4, but I think it will help many others.
Thank you
My sister asked me to root her phone. It seems more complicated than anything I did in the past (HTC Wildfire, Galaxy Core Plus, Xperia M4A).
I tried this tutorial and it kinda worked, but I can't mount image I got, so it's useless (image, not tutorial!).
Phone is LG-H736 (Beat). I got this result in gdisk:
Code:
Partition number (1-42): 39
Partition GUID code: EBD0A0A2-B9E5-4433-87C0-68B6B72699C7 (Microsoft basic data)
Partition unique GUID: A9520AE6-ABC6-F107-E8FE-B37C4C30CB77
First sector: 836608 (at 408.5 MiB)
Last sector: 6074573 (at 2.9 GiB)
Partition size: 5237966 sectors (2.5 GiB)
Attribute flags: 1000000000000000
Partition name: 'system'
The 8K bs gave me floating point result, so I used 0,5K.
So the dd command were:
Code:
dd if=/dev/block/mmcblk0 bs=512 skip=836608 count=5237966 of=/storage/external_SD/system.img
BTW, I had access to SDCard and I didn't need to open ports...
EDIT: I got the system.img. The problem was I haven't got enough space on SD card.
But now I bricked it...
https://forum.xda-developers.com/g4/help/softbricked-g4-beat-lg-h735-t3959237
Hi,
I am stuck in the bootloop after flashing data.img on Pixel C device.
I have done the following steps and have serached around in 100s of forums before posting this. Please bear with me.
My bootloader is unlocked and I have flashed my boot partition with dragon-boot-encryptable-rooted-01092016-1.img so that the data is not encrypted by default.
I have a freshly booted up (new setup) device with default apps installed. I installed one app so that the /data partition contains something. I am firing all commands as root on Ubuntu 14
I then flashboot into TWRP recovery so that I can access root shell through adb. This is not flashing the TWRP recovery, just booting into it.
#adb reboot bootloader
#fastboot boot twrp-3.0.0-0-dragon-ryu-02112016-1.img
#adb shell
~ # whoami
root
~ # df
Filesystem 1K-blocks Used Available Use% Mounted on
tmpfs 1420244 20 1420224 0% /dev
tmpfs 1420244 20 1420224 0% /tmp
/dev/block/mmcblk0p6 396744 452 388100 0% /cache
/dev/block/mmcblk0p7 55453060 304032 55132644 1% /data
/dev/block/mmcblk0p7 55453060 304032 55132644 1% /sdcard
Now, I am interested only in taking image backup of my /data partition which is at /dev/block/mmcblk0p7. I confirmed this by:
/dev/block/platform/700b0600.sdhci/by-name # ls -l
...
lrwxrwxrwx 1 root root 20 Oct 16 07:38 UDA -> /dev/block/mmcblk0p7
...
Now, I fire the make_ext4fs command to create the image.
~#umount /sdcard (optional)
~ # make_ext4fs -s -l 55453060K -a data mydata.img /data
SELinux: Loaded file_contexts contexts from /file_contexts.
Creating filesystem with parameters:
Size: 56783933440
Block size: 4096
Blocks per group: 32768
Inodes per group: 8176
Inode size: 256
Journal blocks: 32768
Label:
Blocks: 13863265
Block groups: 424
Reserved block group size: 1024
Created filesystem with 11/3466624 inodes and 263660/13863265 blocks
mydata.img is created. I do an adb pull on my Ubuntu and fetch the mydata.img and /file_contexts
#adb pull /file_contexts
#adb pull /mydata.img
# du *
20 file_contexts
140888 mydata.img
Now, I convert the mydata.img into raw image file with simg2img.
#./simg2img mydata.img mydata.img.raw
#ls -lrt
-rw-r--r-- 1 root root 17261 Oct 16 13:17 file_contexts
-rw-r--r-- 1 root root 144267780 Oct 16 13:18 mydata.img
-rw-r--r-- 1 root root 56783933440 Oct 16 13:21 mydata.img.raw
Now, I create a directory and mount my raw image into that directory.
#mkdir phonedata
#mount -t ext4 mydata.img.raw phonedata/
I navigate into phonedata and verify the contents. I can see that the app I installed in avaialable under /data/data.
Then, I re-create the image from phonedata mount using make_ext4fs, or I can use the mydata.img fetch by adb pull too.
If I re-create the image, I give file_contexts(fetched) as the -S option to make_ext4fs. One doubt here, if I am re-creating the sparse image, what value should be passed to -l paramtere now?
I got to fastboot and fire these commands.
#fastboot format userdata
#fastboot format data
#fastboot format cache
#fastboot flash data mydata.img { I am confused between data and userdata, which is the correct one. This is mydata.img from adb pull }
#fastboot flash vendor vendor.img { I read in one forum that vendor should be flashed again on a nexus device }
#fastboot reboot
All things take smoothly. When the tab reboot, it shows Google logo, then android flash animation, then it shows 'Android is starting', and then goes back to flash animation. That is, it's stuck in bootloop.
Kindly let me know if there is something with these steps. Or is there is any alternate way to do the same thing. My problem statement is, I need a flashable data.img. I can create TWRP backup and recovery fine, but that's not my requirement.
Thanks!
Edit 1:
I should add, at this point, if I hard boot to fastboot and do a fastboot format userdata followed by fastboot reboot, I am able to boot to device and perform new device setup.
I can also flash system,boot,vendor,recovery and cache.img and perform new device setup normally. This should mean my fastboot/adb are working fine.
Ummmmm
Did you try with smaller sparse image size ?
make_ext4fs -s -l 30000M -a data mydata.img /data
The sparse will grow until max partition size.
Did you play with "img2simg" as well ? (not simg2img)
img2simg mydata.img.raw mydata.img