This isn't a fun start to Saturday

kernel: Solaris: WARNING: can't open objset 95, error 5

root@mfsbsd:~ # zpool import -f -R /dst zroot_dst
cannot import 'zroot_dst': I/O error
	Destroy and re-create the pool from
	a backup source.


Jun 20 11:40:19 mfsbsd kernel: ZFS filesystem version: 5
Jun 20 11:40:19 mfsbsd kernel: ZFS storage pool version: features support (5000)
Jun 20 11:40:22 mfsbsd ZFS[2371]: vdev state changed, pool_guid=$10443359089269485823 vdev_guid=$14936720131378251566
Jun 20 11:40:22 mfsbsd ZFS[2372]: vdev state changed, pool_guid=$10443359089269485823 vdev_guid=$4713809697672316496
Jun 20 11:40:22 mfsbsd ZFS[2373]: vdev state changed, pool_guid=$10443359089269485823 vdev_guid=$14936720131378251566
Jun 20 11:40:22 mfsbsd ZFS[2374]: vdev state changed, pool_guid=$10443359089269485823 vdev_guid=$4713809697672316496
Jun 20 11:40:22 mfsbsd kernel: Solaris: WARNING: 
Jun 20 11:40:22 mfsbsd kernel: can't open objset 95, error 5
Jun 20 11:40:22 mfsbsd ZFS[2375]: vdev state changed, pool_guid=$10443359089269485823 vdev_guid=$14936720131378251566
Jun 20 11:40:22 mfsbsd ZFS[2376]: vdev state changed, pool_guid=$10443359089269485823 vdev_guid=$4713809697672316496
Jun 20 11:40:22 mfsbsd ZFS[2377]: vdev state changed, pool_guid=$10443359089269485823 vdev_guid=$14936720131378251566
Jun 20 11:40:22 mfsbsd ZFS[2378]: vdev state changed, pool_guid=$10443359089269485823 vdev_guid=$4713809697672316496
Jun 20 11:40:22 mfsbsd kernel: Solaris: WARNING: 
Jun 20 11:40:22 mfsbsd kernel: can't open objset 95, error 5
Jun 20 11:40:22 mfsbsd kernel: GEOM_LABEL
Jun 20 11:40:22 mfsbsd ZFS[2379]: vdev state changed, pool_guid=$10443359089269485823 vdev_guid=$14936720131378251566
Jun 20 11:40:22 mfsbsd kernel: : Cannot create slice 8a57407f-ab1b-11ea-8a52-94de80aad24a.
Jun 20 11:40:22 mfsbsd ZFS[2380]: vdev state changed, pool_guid=$10443359089269485823 vdev_guid=$4713809697672316496
Jun 20 11:40:22 mfsbsd ZFS[2381]: vdev state changed, pool_guid=$10443359089269485823 vdev_guid=$14936720131378251566
Jun 20 11:40:22 mfsbsd ZFS[2382]: vdev state changed, pool_guid=$10443359089269485823 vdev_guid=$4713809697672316496
Jun 20 11:40:22 mfsbsd kernel: Solaris: WARNING: 
Jun 20 11:40:22 mfsbsd kernel: can't open objset 95, error 5

root@slocumnew:~ # gpart show
=>    40  180208  da0  GPT  (119G) [CORRUPT]
      40     472    1  freebsd-boot  (236K)
     512  179736    2  freebsd-ufs  (88M)

=>       40  488397088  ada0  GPT  (233G)
         40       1024     1  freebsd-boot  (512K)
       1064        984        - free -  (492K)
       2048   41943040     2  freebsd-swap  (20G)
   41945088  446451712     3  freebsd-zfs  (213G)
  488396800        328        - free -  (164K)

=>       40  488397088  ada1  GPT  (233G)
         40       1024     1  freebsd-boot  (512K)
       1064        984        - free -  (492K)
       2048   41943040     2  freebsd-swap  (20G)
   41945088  446451712     3  freebsd-zfs  (213G)
  488396800        328        - free -  (164K)

root@slocumnew:~ # 

To fix da0 from above:

root@slocumnew:~ # gpart recover da0
da0 recovered
root@slocumnew:~ # gpart show
=>       40  250068912  da0  GPT  (119G)
         40        472    1  freebsd-boot  (236K)
        512     179736    2  freebsd-ufs  (88M)
     180248  249888704       - free -  (119G)

=>       40  488397088  ada0  GPT  (233G)
         40       1024     1  freebsd-boot  (512K)
       1064        984        - free -  (492K)
       2048   41943040     2  freebsd-swap  (20G)
   41945088  446451712     3  freebsd-zfs  (213G)
  488396800        328        - free -  (164K)

=>       40  488397088  ada1  GPT  (233G)
         40       1024     1  freebsd-boot  (512K)
       1064        984        - free -  (492K)
       2048   41943040     2  freebsd-swap  (20G)
   41945088  446451712     3  freebsd-zfs  (213G)
  488396800        328        - free -  (164K)

root@slocumnew:~ # 

zdb -lu /dev/ada0p3

Thank you.

I've since wiped those drives, they were the new ones. New ones are in place and now in use. It was much faster this time around now that I 'know' what I'm doing.