I installed FreeNAS to my 8 GB USB drive from the FreeNAS 11 iso which I created. The install proceeded without error. But when I removed the CD and plugged theUSB drive into the Gigabyte board and rebooted, bios would hang at the Gigabyte splash screen. Over a day I tried many things. The F8 firmware allows boot from a "USB HDD" and I was certain I had booted many varieties of Linux on that board. Even the Windoze install drive booted normally. But my FreeNAS USB refused.
Finally, I got out my copy of GParted which I always have installed on my Ubuntu Linux machines, and looked at what was on the FreeNAS boot drive. Yes, that USB drive that hangs my PC. The First partition of 512.00 KiB was flagged bios_grub. Clicking Ignore at the "Not all of the space available to /dev/sd*" warning, I changed the flags to read boot,legacy_boot,esp using the GParted command Partition->Manage Flags, and then choosing one by one from the drop down menu. So now reading from the FreeeNAS Web interface Boot reads :
Boot Volume Condition: HEALTHY
Size: 7.4 GiB
Used: 750.3 MiB (9%)
Hope this is useful for someone else.
Finally, I got out my copy of GParted which I always have installed on my Ubuntu Linux machines, and looked at what was on the FreeNAS boot drive. Yes, that USB drive that hangs my PC. The First partition of 512.00 KiB was flagged bios_grub. Clicking Ignore at the "Not all of the space available to /dev/sd*" warning, I changed the flags to read boot,legacy_boot,esp using the GParted command Partition->Manage Flags, and then choosing one by one from the drop down menu. So now reading from the FreeeNAS Web interface Boot reads :
Boot Volume Condition: HEALTHY
Size: 7.4 GiB
Used: 750.3 MiB (9%)
Hope this is useful for someone else.