Dual boot from SD and EMMC with Windows

This is how I got dual booting from windows working and am now dual booting Nottachtrix4G from sdcard with stable

cam and WEBTOP along side AOKPCB

I was only able to achieve this after following sendust7 linux guide for dual boot and adapting to windows so all

credit goes to him.

Again these are the steps I took. If you try this and break something I'm not responsible.

Pre-requisites

Notepad++
Minitool partition wizard
Android SDK (google adb for dummies to get everything you need)
Cygwin (if you dont have it start install now and it might be done when its time to use it)
The rom zip you want on your sdcard and the rom zip you want on your phone
Moto-fastboot (search this forum)
Knowledge of ADB and fastboot
Fully Charged Battery



Backup everything from internal and external sdcard

Reboot to recovery

Flash the rom that you want on your sdcard to your phone like you would do normally.

Reboot phone and set it up if you like or just reboot back to recovery. If you set your rom up at this point, this

is how it will look on your sdcard at first boot.

Reboot back to recovery

adb shell

~ #mount /cache
~ #mount /system
~ #mount /data

~ #mount

Take note of system data and cache file systems (ext3 or ext4)


Power off phone and pull sdcard

Insert sdcard into computer and open minitool partition wizard.

Partition and format sdcard with same filesystem as noted before

These are the partition sizes I went with and only because i didnt feel like adjusting the slider anymore. But

These values did ensure they were big enough to hold the phone partitions. The first partition is whats left over

after resizing other partitions and will be formatted to fat32


system=384 MB <second partition on sdcard
cache=700 MB <third
data=2.6 GB <fourth


Insert sdcard and boot to recovery

adb shell

PATIENCE IS KEY FOR NEXT STEPS

~ # dd if=/dev/block/mmcblk0p12 of=/dev/block/mmcblk1p2 bs=1M
655360+0 records in
655360+0 records out
335544320 bytes (320.0MB) copied, 115.626214 seconds, 2.8MB/s

~ # dd if=dev/block/mmcblk0p15 of=/dev/block/mmcblk1p3 bs=1M
dd if=dev/block/mmcblk0p15 of=/dev/block/mmcblk1p3 bs=1M
640+0 records in
640+0 records out
671088640 bytes (640.0MB) copied, 206.557368 seconds, 3.1MB/s


~ # dd if=/dev/block/mmcblk0p16 of=/dev/block/mmcblk1p4 bs=1M
dd if=/dev/block/mmcblk0p16 of=/dev/block/mmcblk1p4 bs=1M
2048+0 records in
2048+0 records out
2147483648 bytes (2.0GB) copied, 658.327418 seconds, 3.1MB/s


Now get boot.img

While still in adb shell

~ #mount /dev/block/mmcblk0p18 /emmc

~ #cp /dev/block/mmcblk0p11 /emmc/boot.img

~ #exit

~ #adb pull /emmc/boot.img boot.img

Go here and follow this step by step and stop after you've got your boot image unpacked

http://xdaforums.com/show....php?t=1630130

If you have any problems with cpio run cygwin installer again and search for cpio and install

Once boot image is unpacked go to the out directory and find init.rc

Edit init.rc with notepad++ (NOT NOTEPAD) and change these lines

ONLY CHANGE THE /dev/bloc/mmcblk part. LEAVE EVERYTHING ELSE THE SAME


From

mount ext4 /dev/block/mmcblk0p12 /system noatime nodiratime wait ro barrier=1
mount ext4 /dev/block/mmcblk0p16 /data nosuid nodev noatime nodiratime wait barrier=1 noauto_da_alloc
mount ext4 /dev/block/mmcblk0p15 /cache nosuid nodev noatime nodiratime wait barrier=1 noauto_da_alloc

TO

mount ext4 /dev/block/mmcblk1p2 /system noatime nodiratime wait ro barrier=1
mount ext4 /dev/block/mmcblk1p4 /data nosuid nodev noatime nodiratime wait barrier=1 noauto_da_alloc
mount ext4 /dev/block/mmcblk1p3 /cache nosuid nodev noatime nodiratime wait barrier=1 noauto_da_alloc

Once you have made these changes you can finish the tutorial posted above or below for repacking and make sure to

click thanks. If the boot_new.img is a different size than original that's okay.

http://xdaforums.com/show....php?t=1630130

Move your boot_new.img to your moto-fastboot and reboot phone to fastboot.


moto-fastboot boot boot_new.img

If you're booted into your sdcard rom you're almost done.

Reboot to recovery and install any rom you want and boot to it.

Now create this directory on your internal sdcard

/sdcard/Boot/sdrom/

Copy your boot_new.img you used to boot your sd rom earlier to this directory and rename it to sdrom.img

Now create this directory on your internal sdcard

/sdcard/Boot/emmcrom/

Now open the rom zip you installed to your phone and copy the boot.img to this directory and rename it to

emmcrom.img

Use attached script with scriptmanager to commense dual booting. (Rename to modified-boot-rom.sh)

Run script as root with argument 1 to reboot to sdcard rom and argument 2 to reboot to phone rom. Argument 3 will

send you to recovery.

All done from windows even though it would be twice as easy and fast to do with linux but there ya go.


I take no credit as all I did was find the right resources and none of this would even be possible without

sendust7. If this helped you Please go to his guide and thank him TOO!!!!

http://xdaforums.com/show....php?t=1642185

95rr900 said:

I get everything up to get boot image. when I run that command, it runs for a few seconds then adb stops responding.

Any advice? I waited the one time for 15 minutes hoping it would respond...but it didn't.

thanks!

Sent from my MB860 using xda premium

Click to expand...

Click to collapse

What rom are you putting on sdcard

EDIT: look in your rom.zip.....boot img may be in there. If it is you can just use that

Edit: could try to make sure sdcard is mounted.......mount /sdcard



Sent from my MB860 using Tapatalk 2

Ryou_Concord said:

I appreciate it, guys!


Man, if you could do that, I'm so sure I wouldn't be the only one to be infinitely grateful for it. Hopefully, once I figure this out I'll get my feet wet in Ubuntu (jaunty, though it may be) out of necessity. It goes without saying that I'm very stoked to have a phone/laptop for use at college.


Also, thanks for that. I can now continue my quest.

Click to expand...

Click to collapse

Today I ported my auto-boot image modifier from Linux/Ubuntu to Windows. Please see my updated thread: http://xdaforums.com/showthread.php?p=28628649#post28628649

So far I've tested NottachTrix 1.3.1 AT&T boot image, and it worked

Gonna see if I can make a flashable version of sd nottachtrix this weekend...will update

Sent from my MB860 using Tapatalk 2

Using CM10 from SD Card

For anyone looking to run NottachTrix (or other rom) from internal memory and CM10 from external. You'll run into the same problem I did. The init.rc and init.olympus.rc files don't contain the partition information. You need to update the fstab.olympus file in the boot.img. I've attached mine for comparison. (note, after repartitioning my SD Card several times I ended up with a phantom partition (mmcblk1p4) therefore my data is actually on mmcblk1p5.

SD card partition sizes:
System: 340mb
Cache: 700mb
Data: 1.25gb

Additional notes about my partitioning experience:
The DD command in linux (and ADB) copies the entire partition exactly to the SD card's partition, therefore you lose space if you leave it this way. I used DD, but then used fsarchiver to backup all of the sd card's partitions, repartitioned the card again, and restored the partition info with fsarchiver. This made my SD card a lot cleaner and avoided wasting any space.

Everything's running great now. Thank you everyone who made dual booting possible!