| Version 7 (modified by , 6 years ago) ( diff ) |
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Modify Internal SDcard storage to External SDcard
The Samsung Galaxy XCover2 (S7710) has only roughly 500MB left on emulated internal storage which is not enough these days if you like to install a lot of applications. There are many tricks around to move data/cache/applications to the external SD card, but all of them has it quirks. Since large SDcard these days are fast and cheap enough having I think this could be done better, by simply discarding the internal /data storage and use an sdcard partition instead.
Requirements
- Linux envirionment with compiler tools
- split-bootimg.pl found ar http://www.enck.org/tools.html
- Android Tools mkbootfs mkbootimg (optional simg2img)
- Android SDK Environment
- Heimdall http://glassechidna.com.au/heimdall/
- Stock S7710 firmware http://live.samsung-updates.com/index.php?device=GT-S7710
What I will do is modify the /fstab.samsungskomer to change the mount of the ext4 /data of the internal location /dev/block/mmcblk0p25 to the second partition of the external SDCard /dev/block/mmcblk1p2. Technically speaking you do not even need to root your device, but by flashing firmware you will need to do some pretty advanced stuff.
Steps
Format SD Card
Format 32GB class 10 or higher SDcard with two partitions:
- 20GB vfat partition, this will serve as the normal extSdCard
- 12GB ext4 partition, this will serve as the new /data partition (make sure it is the second and last partition)
Compile Android Tools
$ git clone https://android.googlesource.com/platform/system/core $ cd core $ git checkout android-4.2.1_r1 $ cd libmincrypt $ gcc -c *.c -I../include $ ar rcs libmincrypt.a *.o $ cd ../mkbootimg $ gcc mkbootimg.c -o mkbootimg -I../include ../libmincrypt/libmincrypt.a $ cd ../mkbootfs $ gcc mkbootfs.c -o mkbootfs -I../include $ cd ../libsparse $ gcc -o simg2img -Iinclude -lz simg2img.c sparse_crc32.c backed_block.c output_file.c sparse.c sparse_err.c sparse_read.c
Modify stock kernel
I assume you have a stock kernel laying around if not download it from the links below.
$ ./split_bootimg.pl boot.img
$ mkdir ramdisk; cd ramdisk
$ gzip -dc ../boot.img-ramdisk.gz | cpio -i
# Alter {{{ fstab.samsungskomer }}} and change /data mountpoint from {{{/dev/block/mmcblk0p25}}} to {{{/dev/block/mmcblk1p2}}}
$ vim fstab.samsungskomer
$ cd ..
$ mkbootfs ./ramdisk | gzip > ramdisk-new.gz
$ mkbootimg --cmdline 'no_console_suspend=1 console=null' \
--kernel boot.img-kernel \
--ramdisk ramdisk-new.gz \
-o boot-new.img
Upload kernel
- Put device in download mode (VolumeDown+Home+Power) on power-on.
- $ sudo heimdall flash --pit S7710.pit --Kernel ./boot-new.img # FYI: Pit file retrieval below
Enjoy your new device
The phone will need to be rebooted a few times and it will be complaining about corruption and encryption, just go will the flow and acknowledge the notifications. Ones completed enjoy your improved Samsung Galaxy XCover 2 (S7710).
Misc
Retrieve PIT file
- Put device in download mode (VolumeDown+Home+Power) on power-on.
- $ sudo heimdall download-pit --output S7710.pit
- Reboot device to perform other heimdall actions as other actions will fail after this.
Root Device
- Install recovery ROM found at http://forum.xda-developers.com/showthread.php?p=43294839#post43294839 some background at http://forum.xda-developers.com/showthread.php?t=2384015
- Install UPDATE-SuperSU-v2.46.zip (or latest) http://forum.xda-developers.com/showthread.php?t=1538053 via recovery mode (Hold VolumeUp+Home+Power on boot).
- Enjoy your rooted phone
Reset to factory defaults
$ unzip XEN-S7710XWAOB1-20150206063723.zip $ tar -xf S7710XWAOB1_S7710XENAOA2_HOME.tar.md5 $ ls *.img
boot.img cache.img hidden.img recovery.img STE_boot1.img STE_boot2.img system.img
Use the PIT file to find out the mapping between image files and partition name to use: $ heimdall print-pit --file ./S7710.pit | grep -e '---' -e 'Partition Name' -e 'Flash Filename'
--- Entry #0 --- Partition Name: MBR,GPT Flash Filename: --- Entry #1 --- Partition Name: MasterTOC Flash Filename: STE_boot.bin --- Entry #2 --- Partition Name: PIT Flash Filename: skomerxx.pit --- Entry #3 --- Partition Name: MD5HDR Flash Filename: md5.img --- Entry #4 --- Partition Name: STEboot1 Flash Filename: STE_boot1.img --- Entry #5 --- Partition Name: STEboot2 Flash Filename: STE_boot2.img --- Entry #6 --- Partition Name: Dnt Flash Filename: dnt.ssw --- Entry #7 --- Partition Name: reserved Flash Filename: --- Entry #8 --- Partition Name: CSPSAFS Flash Filename: cspsa.img --- Entry #9 --- Partition Name: CSPSAFS2 Flash Filename: cspsa2.img --- Entry #10 --- Partition Name: EFS Flash Filename: EFS.img --- Entry #11 --- Partition Name: ModemFS Flash Filename: modemfs.img --- Entry #12 --- Partition Name: ModemFS2 Flash Filename: modemfs2.img --- Entry #13 --- Partition Name: Fota Flash Filename: ssgtest.img --- Entry #14 --- Partition Name: IPL Modem Flash Filename: ipl.bin --- Entry #15 --- Partition Name: Modem Flash Filename: modem.bin --- Entry #16 --- Partition Name: Loke4 Flash Filename: normal.bin --- Entry #17 --- Partition Name: 2ndLoke4 Flash Filename: normal2.bin --- Entry #18 --- Partition Name: PARAM Flash Filename: param.lfs --- Entry #19 --- Partition Name: Kernel Flash Filename: boot.img --- Entry #20 --- Partition Name: Kernel2 Flash Filename: recovery.img --- Entry #21 --- Partition Name: SYSTEM Flash Filename: system.img --- Entry #22 --- Partition Name: CACHEFS Flash Filename: cache.img --- Entry #23 --- Partition Name: HIDDEN Flash Filename: hidden.img --- Entry #24 --- Partition Name: DATAFS Flash Filename: userdata.img
Ensure device is connected using a good quality USB cable, battery is changed and turn it on to download mode using simultaneous press of Volume Down + Home + Power.
Now flash the device:
$ sudo /usr/local/bin/heimdall flash --pit ~/S7710.pit --STEboot1 ./STE_boot1.img --STEboot2 ./STE_boot2.img --Modem ./modem.bin --Kernel ./boot.img --Kernel2 ./recovery.img --SYSTEM ./system.img --CACHEFS ./cache.img --HIDDEN ./hidden.img
Heimdall v1.4.2 Copyright (c) 2010-2017 Benjamin Dobell, Glass Echidna http://www.glassechidna.com.au/ This software is provided free of charge. Copying and redistribution is encouraged. If you appreciate this software and you would like to support future development please consider donating: http://www.glassechidna.com.au/donate/ Initialising connection... Detecting device... Claiming interface... Setting up interface... Initialising protocol... Protocol initialisation successful. Beginning session... Some devices may take up to 2 minutes to respond. Please be patient! Session begun. Downloading device's PIT file... PIT file download successful. Uploading STEboot1 100% STEboot1 upload successful Uploading STEboot2 100% STEboot2 upload successful Uploading Modem 100% Modem upload successful Uploading Kernel 100% Kernel upload successful Uploading Kernel2 100% Kernel2 upload successful Uploading SYSTEM 100% SYSTEM upload successful Uploading CACHEFS 100% CACHEFS upload successful Uploading HIDDEN 100% HIDDEN upload successful Ending session... Rebooting device... Releasing device interface...
References
- Heimdall 1.3.1 is NOT working, make sure to use a higher version.
- Disable power on by home key: http://forum.xda-developers.com/showthread.php?t=2204889&page=15
- Rooting guide hints (windows only): http://forum.xda-developers.com/showpost.php?p=40232503&postcount=45
- Compile simg2img and make_ext4fs http://muzso.hu/2012/08/10/how-to-pack-and-unpack-system.img-and-userdata.img-from-an-android-factory-image
Attachments (1)
- S7710.pit (4.0 KB ) - added by 8 years ago.
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