Quote:
Originally Posted by frostschutz
Yes, it's possible and should work fine as long as the partition numbering remains the same and the reserved bootloader+kernel area is untouched. That's where the hard coded offsets are, everything else depends on the partition table. Even so it's a risky modifcation that should not be done without sdcard access and a good backup of the original state.
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I did this a couple of years ago when I replaced a 16 GB microSD card in my GloHD with an even bigger 64 GB one. After cloning, I increased both rootfs and recoveryfs to 1 GB each (you never know...) - and the user partition to 40 GB. I did this under linux so I didn't notice at first that the user partition was no longer active. Everything worked fine until I connected the Kobo to a Windows computer that just wouldn't mount the user partition. I just initiated a factory reset (at that time and firmware version it was still a "full" factory reset) because I also wanted to check if this would still work okay after resizing rootfs and recoveryfs. It did and this also set the user partition to active again, my Kobo was recognized again by Windows. So far, I haven't noticed any problems with the larger rootfs and recoveryfs.
Of course, such experiments are always less "dangerous" if you know that you can just put in your old microSD card if something goes horribly wrong...