ZFS I'm lost on why my zroot/ROOT has no mount point

T

timm317

I'm running out of space on my plex server and do not understand why. I believe that it is because I have a large majority of my space on my zpool "zroot" taken up by an unused snapshot? or it just got lost during OS upgrades with freeBSD? Please help.

Here is my zfs list that shows no mount point for zroot/ROOT and that takes up the majority of the space:
Code: 
root@localdomain:~ # zfs list -t snapshot
NAME                                       USED  AVAIL     REFER  MOUNTPOINT
zroot/ROOT/default@2023-08-01-09:36:32-0   117M      -     7.61T  -
zroot/ROOT/default@2023-08-01-10:35:53-0  12.6M      -     7.61T  -
zroot/ROOT/default@2023-08-01-10:38:23-0  8.70M      -     7.61T  -
root@localdomain:~ # zfs list -rt snapshot zroot
NAME                                       USED  AVAIL     REFER  MOUNTPOINT
zroot/ROOT/default@2023-08-01-09:36:32-0   117M      -     7.61T  -
zroot/ROOT/default@2023-08-01-10:35:53-0  12.6M      -     7.61T  -
zroot/ROOT/default@2023-08-01-10:38:23-0  8.70M      -     7.61T  -
root@localdomain:~ # zfs list
NAME                                           USED  AVAIL     REFER  MOUNTPOINT
plex2                                         1.10T   668G     1.10T  /media/plex2
plex3                                         6.64T  7.78T     6.64T  /media/plex3
zroot                                         7.71T  1.22T       88K  /zroot
zroot/ROOT                                    7.71T  1.22T       88K  none
zroot/ROOT/13.1-RELEASE-p7_2023-08-01_093632     8K  1.22T     7.61T  /
zroot/ROOT/13.1-RELEASE-p8_2023-08-01_103553     8K  1.22T     7.61T  /
zroot/ROOT/13.2-RELEASE-p1_2023-08-01_103823     8K  1.22T     7.61T  /
zroot/ROOT/default                            7.71T  1.22T      942G  /
zroot/ROOT/default@2023-08-01-09:36:32-0       117M      -     7.61T  -
zroot/ROOT/default@2023-08-01-10:35:53-0      12.6M      -     7.61T  -
zroot/ROOT/default@2023-08-01-10:38:23-0      8.70M      -     7.61T  -
zroot/tmp                                      320M  1.22T      320M  /tmp
zroot/usr                                     5.43G  1.22T       88K  /usr
zroot/usr/home                                 124K  1.22T      124K  /usr/home
zroot/usr/ports                               4.66G  1.22T     4.66G  /usr/ports
zroot/usr/src                                  786M  1.22T      786M  /usr/src
zroot/var                                      938M  1.22T       88K  /var
zroot/var/audit                                 88K  1.22T       88K  /var/audit
zroot/var/crash                                934M  1.22T      934M  /var/crash
zroot/var/log                                 1.31M  1.22T     1.31M  /var/log
zroot/var/mail                                1.92M  1.22T     1.92M  /var/mail
zroot/var/tmp                                   88K  1.22T       88K  /var/tmp
 
timm317 said:
I believe that it is because I have a large majority of my space on my zpool "zroot" taken up by an unused snapshot?
Click to expand...
You have a bunch of old boot environments, freebsd-update(8) creates one every time an update is installed.

Look at bectl list and use bectl destroy ... to destroy old ones to reclaim the space. See bectl(8) for more information.
 
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I'm lost on why my zroot/ROOT has no mount point
Click to expand...
zroot/ROOT functions just as a container for all your Boot Environments (BEs), therefore it is not mounted.

Each BE created is a dateset in that container. Its most prominent member is zroot/ROOT/default. This default dataset represents the default BE. Normally the default BE is the one you booted off; it is active which you can see by identifying the N in the Active column in the output of bectl list and, of course, it has / as its mountpoint.
 
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