To ask you, the problem is that our products haven't upgraded, recently want to upgrade directly from 6.0 to 9.0,
I look at the partition table 6.0/partition location and 9.0 there are a lot of different, 9.0 has such as the security of partition,
Please make a ota whole package, to make its upgrade to 9.0 6.0, so that you can achieve?
I can think of one problem is that the data partition data to do, is 9.0 upgrade script to erase? Including moved to the new location?
Consult done ota bosses grant instruction!