LTM upgrade to v11 from v10

any recommendations between clean install or convert within v10 first?

if you do not want 10.x anymore, i think clean installation is good to go.

sol15459: BIG-IP systems that use partition disk style cannot be upgraded to versions 11.0.0 or later

http://support.f5.com/kb/en-us/solutions/public/15000/400/sol15459.html

thanks - no plan to return to 10 need to get ltms and gtms on to 11.

yes read that KB - but came across the below - but still think clean is better:-

Partitions caused the subsequent upgrade from 10.2.4 to 11.3.0 to fail. I believe v11 is volume-only. It could neither install on partition nor convert the existing partition to volume. Upgrade fails instantly, both via the web interface and using image2disk –format=volumes.

SOLUTION: Using image2disk, I applied the 10.2.4 iso image overtop of the existing 10.2.4 install. image2disk –format=volumes BIGIP-10.2.4.577.0.iso This converted disk config from partitions to volumes. Once that conversion completed, then the upgrade to 11.3.0 worked automagically via the web interface.