[Bug 221077] Boot from ZFS fails following freebsd-update

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=221077

--- Comment #7 from Jason Bacon <bacon4000 at gmail.com> ---

The problem occurred when booting from ZFS.

Since I had to get this system back online and reliable ASAP, I backed it up
and reinstalled with a UFS boot partition.

I had a similar issue twice on another system booting from ZFS a couple years
ago, but it was easily worked around by recreating the contents of /boot.  That
little hack didn't work this time.

As I mentioned, I will continue to boot from ZFS on some of my development
systems and "hope" the problem returns so we can properly diagnose it.

I'll add that the problem seems to occur after particularly heavy writes to the
pool, if 3 times qualifies as a pattern.

In this case, I had just installed a few hundred ports from source.

In the previous case, I had done an rsync backup to the system from another
server I was upgrading.

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