Can I? Dumping partitions of PR1.1, restoring them to PR1.3 N9 - Page 2 - maemo.org

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nieldk	2013-11-08 , 08:15
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Originally Posted by peterleinchen

So you tried to boot PR1.1 SW with PR1.3 kernel?

I thinkg going the way juiceme described may work ...

No. I flashed my second N9 (to restore on) completely stock->openmode full flash. backup was 1.3 FW, and I tried a restore to a completely similar kernel/rootfs.

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	peterleinchen	2013-11-08 , 08:42
	Posts: 4,118 \| Thanked: 8,901 times \| Joined on Aug 2010 @ Ruhrgebiet, Germany	#12

Cause maybe is the different HW revision? (also on N900 there are reports that a full backup cannot be restored on another device)

--
could be worked around with ubiboot.

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	Rusnak-COBRA	2013-11-11 , 17:25
	Posts: 218 \| Thanked: 151 times \| Joined on Dec 2011 @ Slovakia	#13

Hmm, my HW is also a different, as I plan to migrate from 16GB to 64GB...

anyway, 2 of 3 partitions are exactly the same.

Correct me if I am wrong, isn't kernel also stored on the phones memory, in one of system partitions?
Moreover, this is why I'd like to make a dd (bit to bit) copy a restore it in same way, so everything would be stored exactly the same way as was in old N9.

but reading your answers, i amf afraid more and more...

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juiceme	2013-11-11 , 18:24
Community Council \| Posts: 4,920 \| Thanked: 12,867 times \| Joined on May 2012 @ Southerrn Finland	#14

Originally Posted by Rusnak-COBRA

Hmm, my HW is also a different, as I plan to migrate from 16GB to 64GB...

anyway, 2 of 3 partitions are exactly the same.

Correct me if I am wrong, isn't kernel also stored on the phones memory, in one of system partitions?
Moreover, this is why I'd like to make a dd (bit to bit) copy a restore it in same way, so everything would be stored exactly the same way as was in old N9.

but reading your answers, i amf afraid more and more...

The booting kernel is normally stored on MTD chip partition, it is a different than the MMC device that your OS and runtime SW reside.
However, with ubiboot it is a bit different. Ubiboot kernel replaces the original kernel on MTD, and the actual runtime kernel is stored on your OS partition. (this way you can change kernels without reflashing the device)

To copy the device functionality from one to another (or to copy different PR level SW on the same device) you do not need to deal with MTD partition at all.
All that is required is that you back up and restore your mmcblk0p2 (rootfs partition) and mmcblk0p3 (home partition)
You do not need to do anything to mmcblk0p1 (MyDocs partition)

Because the filesystems on partitions 2 and 3 are normal ext4fs, you do not need a bit-to-bit-exact copy, for example a TAR archive is enough.

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	Rusnak-COBRA	2013-11-11 , 19:44
	Posts: 218 \| Thanked: 151 times \| Joined on Dec 2011 @ Slovakia	#15

Can I do any harm to my N9 if I only restore the saved partition and try how it runs? Thanks.

btw, can I do the "ubiboot magic" on devices as I have them now? with no flashing / changing / erasing data?

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juiceme	2013-11-11 , 22:30
Community Council \| Posts: 4,920 \| Thanked: 12,867 times \| Joined on May 2012 @ Southerrn Finland	#16

Originally Posted by Rusnak-COBRA

Can I do any harm to my N9 if I only restore the saved partition and try how it runs? Thanks.

I'd say you cannot very easily harm it permanently, if that's what you are asking.

Originally Posted by Rusnak-COBRA

btw, can I do the "ubiboot magic" on devices as I have them now? with no flashing / changing / erasing data?

Yes, you can also run ubiboot in maintanance mode without flashing it to MTD, just turn the device off and restart it with flasher like this;

Code:

"sudo flasher -k zImage_2.6.32.54-ubiboot-02_301013 -l -b"

The flasher will push the ubiboot kernel to the device without flashing it, and if you do not disconnect the USB cable you will get straight to maintanance mode.