Hi, I've got an E8450 and did an upgrade using owut a few days ago. After upgrading, the router got stuck in recovery mode, and I couldn’t recover it by reflashing the UBI installer or sysupgrade firmware from OpenWRT.
I knew there must be something wrong with either the partition table or system volume, but fdisk wasn’t working on the built-in flash. After some research, when I tried to evaluate all UBI partitions, I found that ubi0_5 and ubi0_7 were missing. Maybe this was caused by a firmware larger than the size of ubi0_5.
So I tried to manually create these two UBI volumes using the following commands:
ubimkvol /dev/ubi0 -n 5 -N fit -s 40MiB
ubimkvol /dev/ubi0 -n 7 -N rootfs_data -m
These commands create:
- A UBI volume 5 with a size of 40MiB and the partition name
fit. - A UBI volume 7 that takes all remaining free space, named
rootfs_data.
The partition numbers and names are from the device page.
After manually creating these two UBI partitions, I was able to flash the new firmware and restore the router to normal operation.
I hope this helps anyone facing the same issue!