Solved Remove ZFS mount points from pool

[gentoobob]

I have a simple zfs pool called NAS. It was once used in FreeNAS but I moved the hard drives over to a simpler FreeBSD 10.2 setup. The zpool had two jails on it from FreeNAS that are no longer used. Everything works great but I noticed anytime I do a mount command I can see mount points on the NAS for the jails. Below...

root@nas:~ # zpool status
  pool: NAS
 state: ONLINE
  scan: scrub repaired 0 in 0h55m with 0 errors on Sun Jan 10 00:55:21 2016
config:

        NAME                                            STATE     READ WRITE CKSUM
        NAS                                             ONLINE       0     0     0
          mirror-0                                      ONLINE       0     0     0
            gptid/015b8c6b-5582-11e5-bb5e-00248194ce35  ONLINE       0     0     0
            gptid/0234aed5-5582-11e5-bb5e-00248194ce35  ONLINE       0     0     0

errors: No known data errors

root@nas:~ # mount
/dev/da0p2 on / (ufs, local, journaled soft-updates)
devfs on /dev (devfs, local, multilabel)
NAS on /mnt/NAS (zfs, NFS exported, local, nfsv4acls)
NAS/TimeMac on /mnt/NAS/TimeMac (zfs, local, nfsv4acls)
NAS/jails on /mnt/NAS/jails (zfs, local, nfsv4acls)
NAS/jails/.warden-template-pluginjail on /mnt/NAS/jails/.warden-template-pluginjail (zfs, local, nfsv4acls)
NAS/jails/plexmediaserver_1 on /mnt/NAS/jails/plexmediaserver_1 (zfs, local, nfsv4acls)
NAS/jails_2 on /mnt/NAS/jails_2 (zfs, local, nfsv4acls)
NAS/jails_2/.warden-template-pluginjail on /mnt/NAS/jails_2/.warden-template-pluginjail (zfs, local, nfsv4acls)
NAS/jails_2/plexmediaserver_1 on /mnt/NAS/jails_2/plexmediaserver_1 (zfs, local, nfsv4acls)

How can I remove these mount points? Any ideas?

 

[gentoobob]

I actually found what I needed on this Sun systems page...http://www.datadisk.co.uk/html_docs/sun/sun_zfs_cs.htm


zfs destroy -r NAS/jails_2
zfs destroy -r NAS/jails


Worked!

 

[ANOKNUSA]

Please read the man page next time, rather than following random info posted to the Internet. Especially for something so rudimentary.

 

[gentoobob]

Sometimes the man pages are confusing as I found the man for ZFS to be when using the correct syntax to initiate the commands. That article was a bit more clear with examples and might help someone else.

 

[SirDice]

Note that the commands do not remove the mountpoints, they remove an entire dataset.

Removing a mountpoint:
zfs set mountpoint=none zroot/my/dataset

Removing an entire dataset:
zfs destroy zroot/my/dataset

The difference can be quite important!

 

[gentoobob]

Thanks for clearing that up. I don't work with ZFS enough and even reading about it can be confusing. Tanks, pools, datasets, etc. All the commands and switches. I am just a hobbyist so thanks for the info!