Hovatek Forum MOBILE Android Question - About ROM_0
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Question - About ROM_0

Question - About ROM_0

blackhaikal
blackhaikal
blackhaikal
Enthusiastic Member
5
23-05-2019, 06:31 AM
#1



Another question from me Smile,
about understanding the ROM_0 that I pull using MTK Droid Tool.

Im able to pull out ROM_0 from my phone via MTKDT (Backup button on root, backup, recovery section) by using scatter file (same phone model) which I downloaded from the internet.

The size of the ROM_0 : 924 Mb

Using the same scatter and used *To Process file ROM_from flash Tool* (on root, backup, recovery section) and this results was out:
##################################################
uboot
preloader
nvram
logo
MT6582_Android_scatter
seccfg
reserve1
reserve2
protect_f
protect_s
pro_info
oppo_custom
misc
MBR
expdb
EBR2
EBR1
secro (.img)
recovery (.img)
boot (.img)
A11w_160813_boot_patced_190519-134448  (.img)
##################################################


* I checked all the above size in total are : 134 Mb
* While ROM_0 size : 924 Mb
* Missing size 924 - 134 = 790 Mb

My Question:
1. Why does this happen (the missing size) ?
2. What type of file extension is that ROM_0?
3. How to successfully extract all inside ROM_0? 
4. Any other way or tools able to pull out file inside ROM_0?
5. Does unlocking bootloader is needed? (just knew about unlock bootloader today but still don't know the function)
 
Thanks and Sorry newbie questions
This post was last modified: 23-05-2019, 06:36 AM by blackhaikal.
X3non
X3non
X3non
Recognized Contributor
22,062
23-05-2019, 11:09 AM
#2
(23-05-2019, 06:31 AM)blackhaikal ...
My Question:
1. Why does this happen (the missing size) ?
2. What type of file extension is that ROM_0?
3. How to successfully extract all inside ROM_0? 
4. Any other way or tools able to pull out file inside ROM_0?
5. Does unlocking bootloader is needed? (just knew about unlock bootloader today but still don't know the function)
 
Thanks and Sorry newbie questions

1. seems mtk droid tool didn't extract system.img , i can only guess that the 900mb + size you used is wrong. you should perform a ramtest on your phone to ascertain the full size of emmc_user region OR readback length way above system
2. rom_0 is a concatenated file consisting of all partitions in emmc_user region
3 & 4. you can use wwr_mtk tool @ https://www.hovatek.com/forum/thread-21970.html
5. No, you don't need to unlock bootloader (its mostly only needed if you need to flash using fastboot)


PS: i take it the scatter file you're referring to is the same @ https://www.hovatek.com/forum/thread-27788.html
use 0x68280000 as the readback length for ROM (that's where system ends and cache begins)

i.e
start addr: 0x0
length : 0x68280000
region: emmc_user
filename: rom_0

process it with mtkdt and see if includes system
This post was last modified: 23-05-2019, 11:09 AM by X3non.
blackhaikal
blackhaikal
blackhaikal
Enthusiastic Member
5
24-05-2019, 09:47 AM
#3
(23-05-2019, 11:09 AM)X3non 1. seems mtk droid tool didn't extract system.img , i can only guess that the 900mb + size you used is wrong. you should perform a ramtest on your phone to ascertain the full size of emmc_user region OR readback length way above system
2. rom_0 is a concatenated file consisting of all partitions in emmc_user region
3 & 4. you can use wwr_mtk tool @ https://www.hovatek.com/forum/thread-21970.html
5. No, you don't need to unlock bootloader (its mostly only needed if you need to flash using fastboot)


PS: i take it the scatter file you're referring to is the same @ https://www.hovatek.com/forum/thread-27788.html
use 0x68280000 as the readback length for ROM (that's where system ends and cache begins)

i.e
start addr: 0x0
length : 0x68280000
region: emmc_user
filename: rom_0

process it with mtkdt and see if includes system

Hi X3non, thank you for your time for comparing those 2 scatter files and answering all my questions.
Now im able to understand a bit about those complicated android stuffs xD
I will try to do as you suggested above and see how it goes Big Grin
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