I want some clarifications here

As my understanding:

Physical Volumes entries exist in: /dev/dsk n /dev/rdsk with slice
information. Anyway we can get the Physical volumes/disk info

And for logical Volumes: /etc/mnttab, /etc/vfstab contains entries
And its not generic to get all the Logical Volumes from these
location. Suppose Volume Managers are (+1) installed then Scene is
different as Volume Managers are having their own approch make entries
under OS ... like Veritas Volume Manager (VxVm) is creating logical
volume entries in /dev/vx/....

So my question is "Is there any independent way to get all Logical
Volumes without taking care of Volume Managers?"

Thanks!