cinereus

For future reference, I had to do an unclean shutdown, cancel the parity check then use the unsafe shrink array method.
 
It seems the Unraid docs are out of date as the dd shrink array method is not reliable enough to use in practice.

Thanks. I worked it out myself. It turns out you don't even need to do that.
 
If you just set DNS in eth0, even if it's a different subnet to eth1 and eth0 is not active unraid will happily use this DNS for eth1.

EDIT:
 
Solved the issue. Removed exec zsh from .bash_profile using a userscript 
 
And the issue occurs because NerdPack is silently disabled even though release notes don't mention it no longer works and the plugin remains installed.