Need help renaming Partitions in Dual Boot kernel!! Please Help!!

[ketut.kumajaya]

How do you manage nandroid create/restore of secondrom then?

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By manipulating block devices.
Code snipped:

  losetup /dev/block/loop0 /.secondrom/media/.secondrom/system.img
  # Delete /system block device
  rm -f /dev/block/mmcblk0p20
  # Delete /cache block device
  rm -f /dev/block/mmcblk0p19
  # Link /system block device to /dev/block/loop0
  ln -s /dev/block/loop0 /dev/block/mmcblk0p20
  # Link /cache block device to /dev/block/mmcblk0p16
  ln -s /dev/block/mmcblk0p16 /dev/block/mmcblk0p19

My English not good enough to explain, feel free to unpack my PhilZ Touch repack from http://forum.xda-developers.com/showpost.php?p=47342530&postcount=2 . I have no chance to build Android from source before, this limitation has made me creative to reuse existing resource (PhilZ Touch, AROMA, etc).

 

[DerTeufel1980]

That's enough, but unfortunately not working for us. We don't have enough block devices large enough to have data partition on it.
I need to share default data partition between both roms by bind mounting (Well I could use data.img, but then the size would be fixed, what I don't like)

Edit: what's the size of your p16?

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[ketut.kumajaya]

My solution based on gokhanmoral's solution with different implementation, strictly follow his "rule" but simpler. Used bind mounted /data/media/.secondrom/data as 2nd ROM data storage and hidden partition p16 as /cache partition. My dual boot works on Tab 2 (OMAP4) and Tab 3 8.0 (Exynos 4212), there's no reason not work on another device.

 

[DerTeufel1980]

I see, but then there is no block device for secondary data. How do you manipulate/nandroid it? (I initially thought you are using hidden part for data)

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[ketut.kumajaya]

Nandroid backup for emulated sdcard device recursive copy /data excluding /data/media, so what the problem? I used scripting mount replacing mount binary for 2nd recovery, always lock /data (/data/media/.secondrom/data actually) for safety. To prevent a bad flashable zip wrong mounting /data partition.

 

[kkemp31]

If you get this to work what's the chance of creating a hijacking at the beginning of booting like safe strap for phones with out unlocked bootloader

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