Can you also tell how does LVM fit into this picture. See the sequence of following commands:
bash-4.4# lsfs
Name Nodename Mount Pt VFS Size Options Auto Accounting
/dev/hd4 -- / jfs2 720896 -- yes no
/dev/hd1 -- /home jfs2 8454144 -- yes no
/dev/hd2 -- /usr jfs2 12648448 -- yes no
/dev/hd9var -- /var jfs2 8781824 -- yes no
/dev/hd3 -- /tmp jfs2 4390912 -- yes no
/dev/hd11admin -- /admin jfs2 262144 -- yes no
/proc -- /proc procfs -- -- yes no
/dev/hd10opt -- /opt jfs2 8454144 -- yes no
/dev/livedump -- /var/adm/ras/livedump jfs2 524288 -- yes no
bash-4.4# mount
node mounted mounted over vfs date options
-------- --------------- --------------- ------ ------------ ---------------
/dev/hd4 / jfs2 Jan 16 00:33 rw,log=/dev/hd8
/dev/hd2 /usr jfs2 Jan 16 00:33 rw,log=/dev/hd8
/dev/hd9var /var jfs2 Jan 16 00:33 rw,log=/dev/hd8
/dev/hd3 /tmp jfs2 Jan 16 00:33 rw,log=/dev/hd8
/dev/hd1 /home jfs2 Jan 16 00:33 rw,log=/dev/hd8
/dev/hd11admin /admin jfs2 Jan 16 00:33 rw,log=/dev/hd8
/proc /proc procfs Jan 16 00:33 rw
/dev/hd10opt /opt jfs2 Jan 16 00:33 rw,log=/dev/hd8
/dev/livedump /var/adm/ras/livedump jfs2 Jan 16 00:33 rw,log=/dev/hd8
bash-4.4# lsvg
rootvg
bash-4.4# lsvg -l rootvg
rootvg:
LV NAME TYPE LPs PPs PVs LV STATE MOUNT POINT
hd5 boot 1 1 1 closed/syncd N/A
hd6 paging 16 16 1 open/syncd N/A
hd8 jfs2log 1 1 1 open/syncd N/A
hd4 jfs2 11 11 1 open/syncd /
hd2 jfs2 193 193 1 open/syncd /usr
hd9var jfs2 134 134 2 open/syncd /var
hd3 jfs2 67 67 2 open/syncd /tmp
hd1 jfs2 129 129 1 open/syncd /home
hd10opt jfs2 129 129 1 open/syncd /opt
hd11admin jfs2 4 4 1 open/syncd /admin
lg_dumplv sysdump 32 32 1 open/syncd N/A
livedump jfs2 8 8 1 open/syncd /var/adm/ras/livedump
bash-4.4#
lsvg -l rootvg also seems to provide all the mount point information plus information on some other devices. Can that be taken as a source of truth?