normal mount points

illoai at illoai at
Sat Apr 28 19:55:24 UTC 2007

On 28/04/07, Graham North <northg at> wrote:
> I ran the df command last night to check slice sizes in anticipation of
> doing some backup and eventual tranfer to a new machine.
> The output gave me not just normal slices that were created at install
> but also three additional (mount points?)
> /proc
> /net
> /host
> The machine is a simple web server and print server with little else on
> it.   Can some explain to me (or point me to) an explanation of mount
> points?

Filesystem      1K-blocks     Used    Avail Capacity  Mounted on
/dev/ad0s1a       1012974    36926   895012     4%    /
devfs                   1        1        0   100%    /dev
/dev/ad2s1d       5616214   716542  4450376    14%    /home
/dev/ad0s1e       1012974    22352   909586     2%    /tmp
. . .

Mount points are merely directories where devices
are mounted as part of the filesystem.  These can be
automatically mounted by a listing in /etc/fstab or manually
mounted using /sbin/mount.  That they show up in df's
listing means that something is in fact mounted on it.

Typing "mount" at a command prompt will give you a listing
of mounted devices like so:

/dev/ad0s1a on / (ufs, local)
devfs on /dev (devfs, local)
/dev/ad2s1d on /home (ufs, NFS exported, local, nosuid, soft-updates)
/dev/ad0s1e on /tmp (ufs, local, soft-updates)
. . .

As none of those above (/proc /net /host) are part of the
standard layout (Well, /proc was on 4.x and earlier) some-
one at some time has added them.


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