I suggest to retry the dd command on a fresh zvol (if there would have been errors then they would have shown here). It depends on the disks speed, but it would take several minutes until completion. Can you check the size of the img file?
Also, you might want to delete the last printscreen from your post.
Been trying to do this on TrueNAS-12.0-U8.1. I have used the generic x86 image and have tried the converted image method from the original guide. Issue is I keep getting Boot Failed. EFI Misc Device or Boot Failed. EFI Hard drive.
I have no idea what I am missing - anyone else had this issue?
EDIT - Worth adding that if I add the generic or converted VDI image as a raw file it boots fine into the image file so I know the images are all good
I’ve been trying this for a couple hours. When copying to dev using the web shell, running as root I get the following output: dd /dev/zvol/bulwark/haos-chars: Operation not supported
where chars is the random set of characters assigned to my vm zvol.
Any help with sorting this out appreciated
So update on this, as soon as I got it to ‘work’ it couldn’t detect the root device. This was because I had used VirtIO as the disk instead of AHCI when creating the VM. As soon as I set the disk to ACHI, the NIC to use the hardware adapter, and created a DHCP reservation in my router, it worked like a charm and took all of 5 minutes to get to run.