You don't need to export the pool on shutdown. Even an unclean shutdown
should survive automatically on the reboot.

I can't think of a reason ZFS would fail like you describe.

On Wed, Feb 21, 2018 at 12:23 PM, Walter Parker <walt...@gmail.com> wrote:

> Hi,
>
> I have 2.4.2 installed on an SG-2220 from Netgate [nice box]. I just bought
> a 6TB powered USB drive from Costco and it works great (the drive has its
> own power supply and a USB hub). I want to use it take ZFS backups from my
> home server.
>
> I edited /boot/loader.conf.local and /etc/rc.conf.local to load ZFS on boot
> and created a pool and a file system. That worked, but the memory ran low
> so I restricted the ARC cache to 1G to keep a bit more memory free and
> rebooted. When the system rebooted it did not remount the pool (and
> therefore the file system) because the pool what marked as in use by
> another system (itself). That means that the pool was not properly
> exported/umounted at shutdown.
>
> Taking a quick look a rc.shutdown, I notice that it calls a customized
> pfsense shutdown script at the beginning and then exits. Is there a good
> place in the configuration where I can put/call the proper zfs shutdown
> script so that the pool is properly stopped/exported so that it imports
> correctly on boot?
>
>
> Walter
>
> --
> The greatest dangers to liberty lurk in insidious encroachment by men of
> zeal, well-meaning but without understanding.   -- Justice Louis D.
> Brandeis
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