Can't mirror boot (USB) disk

[knubbze]

I'm running Solaris 11.1 with napp-it from an ultrafast USB flash drive (Sandisk Extreme 32GB), and I'm trying to use napp-it's 'mirror bootdisk' menu feature to create a mirror of my boot disk onto another identical flash drive, but it says that there are no mirror disks available:

This is the 'Disks' menu:

I figured that maybe I need to initialize the disk, but the Disks->Initialize screen shows 'none' available disks:

Any ideas what the problem is?

 

[gea]

I would:
- initialize the stick an a Mac or PC and retry
- read Managing Your ZFS Root Pool - Oracle Solaris Administration: ZFS File Systems

The napp-it mirror menu is ok with Illumos and Solaris Express based systems. Solaris 11.1 behaves different.

 

[knubbze]

Do I initialize the stick in Drive Management in Windows? I have already partitioned and formatted the stick with FAt32 to test it on my Windows machine before I plugged it into my Solaris 11.1 Microserver.