trouble here too, flashed recoveryV1 into the phone using fastboot, rebooted into recovery V1, tried to install from the ROM of 20th from USB: Still same issue "e: failed mounting dataroot".
Tried wiping data/factory reset. tried again, same issue.
Recovery log shows me:
I: can't partition non-vfat: /storage/sdcard0 (ext4)
mount: mounting/dev/part_backup_userdata on /data_root failed: invalid argument
W: Failed to mount /dev/part_backup_userdata (File exists)
Whatever I try in the so called recovery V1 (flashed from fastboot), no go. Any help ?
How can I see in the Recovery what EXACT version of the recovery I have? Now it just shows 6.0.5.0, no further indication V1 or V2 ...
Thanks