Do firmware upgrades need to be in sequence? ZyWall USG 100
I have a ZyWall USG 100 which I haven't used much the last few years.
Firmware was 2.20 AQQ.0 released 04-06-2010.
Tried to upgrade to 3.00 AQQ.4 released 01-30-2013.
Received error errno: -42008 Firmware Not Compatible!
Tried upgrade to 2.20 AQQ.1 released 05-17-2010.
This was successful.
Now I wonder, will the upgrade to 3.00 AQQ.4 eventually work if I apply all the preceding firmware releases in sequence? That would be
2.20 AQQ.2 released 10-01-2010
2.20 AQQ.3 released 11-05-2010
2.20 AQQ.4 released 04-25-2011
2.20 AQQ.5 released 06-29-2011
2.20 AQQ.6 released 10-11-2011
3.00 AQQ.0 released 03-02-2012
3.00 AQQ.2 released 05-08-2012
3.00 AQQ.4 released 01-30-2013
just read the readme in the firmware zip
Please first jump to 2.20Patch2 C0, 2.20Patch3 C0 or 2.20Patch4 C0 before upgrade firmware from above 2.20Patch2 C0 to 2.20Patch5 C0 and later.
Done. Successfully applied one firmware release after the other. Now running ZyWall USG 100 3.00 (AQQ.4) CO.