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Root Custom MTD

ducky1979

ducky1979

Android Expert
Just wondering if someone can tell me the optimal sizes for a custom MTD running GV 2.1 and also the easiest/best way to do it. Cheers. Lots of love from Talula!
 
Not sure how much gv 1.5 and 2.1 differ in size, but you could check out the size of your current system and data partition using root explorer.
And where is Talula?
 
25-30MB cache. Check current sizes with quick system info for system. Then leave about 5MB extra to play with
 
Had a look at that, so do you do this through adb? And what's the script it refers to? Do you have to write your own? Sorry for all the questions but this is verging onto the very technical for me.
 
script is already there, those 2 zip files. you need to have the txt file mentioned in 5th step in sdcard. you do all this stuff from recovery.

if you dont understand that thread clearly, I suggest you not to go further.

may be you can try alpharev tables at first for some experience
 
I understand 90% of it, it was the txt file that confused me. Did you just use the one on the thread? Or did you modify it? Does the txt file just tell it what size to make the partition. Oh and thanks for the recommendation, I might just play with the alpharev ones first. I can't believe how much stuff there is to learn to all this.
 
I didnt try custom tables till now as I change roms too often :D
yes, text file will tell the partition sizes to phone.

may be Suroot can give you more knowledge on this
 
Its quite simple but the thread on XDA isn't really clear.

You have a file on the sd card called "mtdpartmap.txt"

This contains your layout like below:

"mtd 130 25" (without quotations). Thats it. That gives 130MB system and 25MB cache. Everything else goes to data.

Then you have 2 patch files. One to patch recovery and one to patch boot. You only need to use the recovery patch the first time you use a layout (but if you change the layout, you patch recovery again).

Every time you flash a rom (update included) you patch boot so the boot.img of teh rom knows the same layout as recovery.

The patches read the text file (so it must always remain in place) and patch recovery or boot with that layout information

So this is how to do it.

Set up your mtdpartmap.txt on SD
Nandroid backup.
Format system, cache and data
Install the recovery patch zip
Reboot recovery
format system, cache and data to make sure
Nandroid restore
Patch boot

After patching boot, its worth taking a nandroid so you have a backup thats good to go straight away. Obviously the last backup was pre boot patch

Hope that helps
 
Sorry when I say an update, I mean a new rom like from GV 2.1 to GV 2.2, you need to repatch boot. Flashing kernels, themes etc, nothing needs to be done.

If you dont paqtch boot, the rom wont boot.

Yes the file literally has the word mtd a space, the size of system, space, size of cache

eg

mtd 130 25
 
How easy is it to return it back to stock if I ever needed to, and does the phone still run as fast with the custom MTD?
Also, so I would have to create the txt file using notepad? Flash the zip's and that's it, but would need to flash the boot zip on every install?
 
ducky1979 said:
Just wondering if someone can tell me the optimal sizes for a custom MTD running GV 2.1 and also the easiest/best way to do it. Cheers. Lots of love from Talula!
Click to expand...
I'm running GV v2.1, and it is using (nothing modified from the original ROM) 142MB space.
So, it would be safe to keep at least 150MB in System partition.
 
ducky1979 said:
How easy is it to return it back to stock if I ever needed to?
Click to expand...

Fastboot flash an unmodified (unpatched) clockwork mod ro replace the patched one, then format cache, system and data again.

Not sure about putting a nandroid back on. But once you have it, you have it. Even if you're not using it to run a custom layout, may aswell keep it.

ducky1979 said:
does the phone still run as fast with the custom MTD?
Click to expand...

Yes

ducky1979 said:
Also, so I would have to create the txt file using notepad? Flash the zip's and that's it, but would need to flash the boot zip on every install?
Click to expand...

Yes (or create it on your phone), flash the zips but dont forget about the format and backup / restore and finally - yes. Every time you flash a rom.
 
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