Is it possible to add another drive to the boot pool for raid1?

[flashdrive]

If this is not possible:

what is the best way to set up a raid1 boot pool for an already running system?

And yes, I am using USB thumb drives - don't want to start that discussion.

 

[NugentS]

Yes you can.

 

[danb35]

Boot

Provides reference descriptions of the boot environment screens and settings.

www.truenas.com

 

[flashdrive]

Thank you @NugentS and @danb35

classic case of "read the manual first..."

 

[sfatula]

You can't do raid1 but you can do a mirror!