Understand disk partition, container and volume
I am confused by the notions of partitions, containers and volume.
Looking at a recent mac with default setup, inside disk utility, I see 1 disk, 1 partition, 1 container and 2 volumes.
However, the right side of disk utility says "Shared by 5 volumes" so I am guessing there are 3 hidden volumes? What are these 3 hidden volumes?
Then I try to understand how this structure is reflected on the file system. The disk is called disk0 in diskutility, but if I do an `ls disk0*` I see :
disk0# disk0s1# disk0s2# disk0s3#
what are these 4 directories?
Inside diskutility, the container is called disk3, but I see 8 directories:
/dev/disk3 /dev/disk3s1 /dev/disk3s1s1 /dev/disk3s2 /dev/disk3s3 /dev/disk3s4 /dev/disk3s5 /dev/disk3s6
Why are there 8 directories and not 5 (1 per volume).
Thanks for any hint to help my understanding !