Bad UFS Volume preventing a complete startup

[kipfrey]

Whatever happened on my FreeNASv8, the initial mount process announces that there is an inconsistency in my last volume, and forces me into single user mode, making the gui unavailable. I tried removing the entry from /etc/fstab, but apparently that gets overwritten at startup, and since I can't access the gui, I am stuck. Running fsck from the # prompt gives the message that it can't stat that volume. I don't particularly care about that volume, but I need to get the system back up. How do I manually remove that volume or get the system to ignore it, so that I can get to the gui and see if the drive is usable and rebuild that volume.