For #3 officially, nesting TrueNAS in another hypervisor and then using it as a hypervisor is not really recommended, especially with any kind of virtual drives. It could lead to challenges. Virtualizing drives is definitely not recommended and the most stable choice is passing pcie through with a hba card.
Given that, I have a similar setup and I’ve made backups for important data, I passed a pcie data/SAS hba card that I connect any TrueNAS drives to directly instead of a virtualized drive.
For #3 officially, nesting TrueNAS in another hypervisor and then using it as a hypervisor is not really recommended, especially with any kind of virtual drives. It could lead to challenges. Virtualizing drives is definitely not recommended and the most stable choice is passing pcie through with a hba card.
Given that, I have a similar setup and I’ve made backups for important data, I passed a pcie data/SAS hba card that I connect any TrueNAS drives to directly instead of a virtualized drive.
https://www.truenas.com/blog/yes-you-can-virtualize-freenas/