Well, here's how Solaris2-x86 sets things up (with names) on a PC:

Filesystem            kbytes    used   avail capacity  Mounted on
/dev/dsk/c0d0s0        59759   11508   42281    22%    /
/dev/dsk/c0d0s4       337519  279133   24636    92%    /usr
/proc                      0       0       0     0%    /proc
fd                         0       0       0     0%    /dev/fd
/dev/dsk/c0d0s3       113839   25489   76970    25%    /var
/dev/dsk/c0d0s5       299567   74223  195394    28%    /opt
swap                  217396     212  217184     1%    /tmp
/dev/dsk/c0d0p0:c     390864  341224   49640    88%    /dos/c
/dev/dsk/c1d0p0:c     205380   30124  175256    15%    /dos/d
/dev/dsk/c0d0p0:d     697312  395152  302160    57%    /dos/e

but /dev/dsk is messy:

lrwxrwxrwx   1 root     root          38 Feb 27 02:15 /dev/dsk/c0d0p0 -> ../../devices/isa/ata@1f0,0/cmdk@0,0:q

which is:
brw-r-----   1 root     sys      102,464 Feb 27 12:52 cmdk@0,0:q
and:
crw-r-----   1 root     sys      102,464 Feb 27 12:52 cmdk@0,0:q,raw
is for /dev/rdsk.

(the :c, :d is used by mount_pcfs and is rather ugly).

FreeBSD comes up as:
/dev/wd0a           38991    22270    13602    62%    /
/dev/wd0s3f        347647   122410   197426    38%    /usr
/dev/wd0s3g        248175   112304   116017    49%    /usr/local
/dev/wd0s3h        198079    60239   121994    33%    /usr/src
/dev/wd0s3e         63567     3716    54766     6%    /var
procfs                  4        4        0   100%    /proc
kernfs                  1        1        0   100%    /kern
/dev/wd0s1         390864   341224    49640    87%    /dos/c
/dev/wd2s1         205380    30124   175256    15%    /dos/d

(I can't access the "E:" drive for DOS)

Darren