>>10244
>Now running this
Fug, seems that I got a kernel panic:
>$ sudo zpool import -f -FX zb # PID 101848
>
>Message from syslogd@ubuntu-Laptop-main-computer at Apr 26 00:34:40 ...
> kernel:[279654.540599] PANIC: zfs: adding existent segment to range tree (offset=a011368c000 size=8cb000)
>

That command has been running for nearly 2 days:
>$ ps -o etime 101848
> ELAPSED
> 1-22:12:47
>$ # HDD LED is still on
That 18TB HDD isn't making noise and it feels cold to the touch - symptoms consistent with being dead. (Think happy thoughts, like the dream I just had where a blonde girl basically went on vacation with me.)

Things could have been worse, obviously. It could have been more entrenched before it "died" + other things I thought of before. For >24 hours now, "zpool list" does not show anything and the only way to end that command is to close the terminal tab (ctrl+c doesn't work). This behavior is indicative of the current kernel session being tainted. Fix a tainted kernel: restart the computer. See info on the tainted kernel: I probably I forgot the command to do that.