Unable to unmount zfs

[tmati]

'm trying to install Proxmox using ZFS on a software-based RAID1 installation

When an installation is complete, receive a small pop-up window that says:



"Could not unmount zfs"



When ctrl + alt + f2, you see the attachment.

 

[Stoiko Ivanov]

* if you change the screen to ctrl+alt+f1 or f3 do you see any other messages?
* anything in the `dmesg` or journal output?