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Honey, I broke my ZFS USB SATA SSD 1 TB disk, Oops. What can I do to fix this ZFS to boot again?

 Honey, I broke my ZFS  USB SATA SSD 1 TB disk, Oops.  What can I do to fix this ZFS to boot again? mountroot>  zfs:arm64pool/ROOT/default  I do have a USB to 3.3V TTL serial port from a Linux computer running minicom 115200 baud connected to 3.3V pins serial port (UART0 or UART1) on Raspberry Pi 4B: Pin    Function 6      Ground 8      RXD 10     TXD  I have debug messages on.   It did mount the ZFS disk files, read-only, so we can not edit files like /boot/loader.conf   or  /etc/rc.conf  We can check the ZFS parameters. root@:/ # df -h Filesystem                Size    Used   Avail Capacity  Mounted on arm64pool/ROOT/default    779G     23G    756G     3%  ...