[Bug 167685] ZFS on USB drive prevents shutdown / reboot

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=167685

Mark Millard <marklmi26-fbsd@yahoo.com> changed:

           What    |Removed                     |Added
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                 CC|                            |marklmi26-fbsd@yahoo.com

--- Comment #19 from Mark Millard <marklmi26-fbsd@yahoo.com> ---
In my simple ZFS context I'v enver gotten such behavior. Here I'm using a da0
based
UFS boot and later adding da1 and importing its pool:

# gpart show -p da1
=>        40  1875384928    da1  GPT  (894G)
          40      532480  da1p1  efi  (260M)
      532520        8152         - free -  (4.0M)
      540672    62914560  da1p2  freebsd-swap  (30G)
    63455232   184549376  da1p4  freebsd-swap  (88G)
   248004608    20971520         - free -  (10G)
   268976128  1468006400  da1p3  freebsd-zfs  (700G)
  1736982528   138402440         - free -  (66G)

# zpool import
  pool: zwdk23
    id: 8373431646426325674
 state: ONLINE
status: Some supported features are not enabled on the pool.
(Note that they may be intentionally disabled if the
'compatibility' property is set.)
action: The pool can be imported using its name or numeric identifier, though
some features will not be available without an explicit 'zpool upgrade'.
config:

zwdk23               ONLINE
  gpt/wdk23CA78Czfs  ONLINE

Note: I historically use a /usr/share/zfs/compatibility.d/openzfs-2.*-freebsd
as the feature set
-- or the likes of /usr/share/zfs/compatibility.d/openzfs-2.2 when there is no
linux vs. freebsd
distinction for where I have things set. Thus main tends to produce the
some-not-enabled message.

# zpool import -t -f -R /zptemp-mnt/ zwdk23 zptemp

# zpool list -v
NAME                  SIZE  ALLOC   FREE  CKPOINT  EXPANDSZ   FRAG    CAP 
DEDUP    HEALTH  ALTROOT
zptemp                696G   574G   122G        -         -    20%    82% 
1.00x    ONLINE  /zptemp-mnt/
  gpt/wdk23CA78Czfs   700G   574G   122G        -         -    20%  82.5%     
-    ONLINE

# zfs list # shortened listing via ". . ." for omissions
NAME                                      USED  AVAIL  REFER  MOUNTPOINT
zptemp                                    574G   100G    96K 
/zptemp-mnt//zwdk23
. . .
zptemp/ROOT                              4.94G   100G    96K  none
zptemp/ROOT/build_area_for-main-CA76      364K   100G  3.00G  none
zptemp/ROOT/main-CA76                    4.94G   100G  2.88G  none
zptemp/poudriere                          516G   100G   112K 
/zptemp-mnt//usr/local/poudriere
zptemp/poudriere/data                     516G   100G   128K 
/zptemp-mnt//usr/local/poudriere/data
zptemp/poudriere/data/.m                  112K   100G   112K 
/zptemp-mnt//usr/local/poudriere/data/.m
zptemp/poudriere/data/cache              16.4M   100G  16.4M 
/zptemp-mnt//usr/local/poudriere/data/cache
. . .
zptemp/poudriere/ports                     96K   100G    96K 
/zptemp-mnt//usr/local/poudriere/ports
zptemp/tmp                               14.8M   100G  14.8M  /zptemp-mnt//tmp
zptemp/usr                               13.9G   100G    96K  /zptemp-mnt//usr
. . .
zptemp/usr/home                           906M   100G   906M 
/zptemp-mnt//usr/home
zptemp/usr/local                         2.37G   100G  2.37G 
/zptemp-mnt//usr/local
. . .
zptemp/usr/ports                         6.81G   100G  6.81G 
/zptemp-mnt//usr/ports
zptemp/usr/src                             96K   100G    96K 
/zptemp-mnt//usr/src
zptemp/var                               47.0M   100G    96K  /zptemp-mnt//var
zptemp/var/audit                          360K   100G   360K 
/zptemp-mnt//var/audit
zptemp/var/crash                          184K   100G   184K 
/zptemp-mnt//var/crash
zptemp/var/db                            42.0M   100G    96K 
/zptemp-mnt//var/db
zptemp/var/db/pkg                        41.8M   100G  41.8M 
/zptemp-mnt//var/db/pkg
zptemp/var/db/ports                       148K   100G   148K 
/zptemp-mnt//var/db/ports
zptemp/var/log                           2.75M   100G  2.75M 
/zptemp-mnt//var/log
zptemp/var/mail                          1.24M   100G  1.24M 
/zptemp-mnt//var/mail
zptemp/var/tmp                            404K   100G   404K 
/zptemp-mnt//var/tmp

Over the years I've never had a problem with shutdown or reboot for such a
context.
But I've not used mirroring or other such. I experimented with ZFS to
experiment
with bectl use, not other usage that is typical.

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