hnyman
January 7, 2020, 9:45pm
5
Did you use the TFTP recovery flashing method?
Normal sysupgrade is not enough as the ubi size does not get modified in the sysupgrade process, although the new firmware might say a different new size for it.
Reference to my old analysis:
I think that I tracked that down: the sysupgrade process uses ubi-based write tool "ubiupdatevol" instead of the old good mtd. Kernel and rootfs are written separately using that tool into an existing mtd partition, and the tool reads the mtd partition info from the currently running firmware. (there is no practical way to check inside the image for the new partition structure)
Apparently that tool also sets the ubi volume size info, so even if the new mtd partition is larger, the ubi volume i…
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