Looks like I finally made it but it was a long journey.
I do not understand why I always have trouble with freenas on this creepy box.
What I did:
- Install 9.2.1.5 on a new stick since the old one had only 4GB.
- Update to 9.3 went wrong using the update image.
- Then I made it somehow to use 9.3 installer for installation which also failed on first two tries.
- Tried to update the crossflashed LSI HBA to the same version as the driver uses which was also a bit difficult since this box does not accept booting a freedos image for flashing like the three other boxes I tried.
- Finally updated the HBA from inside freenas with BSD installer (great idea to have sas2flash preinstalled).
- Last but not least updated freenas to 9.10 using the online update mechanism.
Thanks for your help!
I think next time this box makes problems I'll throw it out of the window.