Thread: Can I? Dumping partitions of PR1.1, restoring them to PR1.3 N9
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juiceme is offline juiceme
2013-11-08 , 05:50
Community Council | Posts: 4,920 | Thanked: 12,867 times | Joined on May 2012 @ Southerrn Finland
#6
Originally Posted by Hurrian View Post
CMT firmware differences don't really matter - e.g. China flashed CMTs more-or-less work just fine on say, PR_LEGACY 001.
I kind of assumed this is so but have not got definite proof on it, as I have not tried this myself. (that's just because I do not have any devices other than PR1.3...)
Other than (possible) CMT incompability I do not see any real roadblocks in doing it.


Originally Posted by Hurrian View Post
Restoring partitions using BackupMenu and loading the kernel with ubiboot will work, though.
It is better to do both saving and restoring under ubiboot rather than BackupMenu, IMHO, as when you run the traditional BackupMenu you have rootfs mounted. It's good for backups of the home partition but as ubiboot runs orthogonally to all filesystems on mmcblk0 it is preferred when you want to grab everything from it.


Originally Posted by Hurrian View Post
You might want to apply the L2 enable patch onto the PR1.1 sources, though!
That's a good point! However at least I do not have sources for kernels of earlier PR's.


Originally Posted by Hurrian View Post
NOTE: Flasher-3.5 will still recognize the device firmware as PR 1.3, software version is stored in CAL, IIRC.
Yes, but that should not be visible for any userland software unless it really wants to dig the version out from the system basement. All OS SW will be on PR1.1.

One thing to note, the kernel command line given by NOLO when the device boots might be different between PR1.1 and PR1.3
If that is so, then you have to patch the differences in ubiboot loader where it handles the input and output command line.
(fortunately the newest ubiboot can also replace the whole command line, not just inject parameters into it like previous versions...)