Checking root's history I find:

1406  07/01/26 12:04:10 mount -o rw,suid,dev,exec,auto,nouser,async
/dev/sdb12 /mnt/p12

When I run findmnt I get

└─/mnt/p12                   /dev/sdb12  btrfs
 rw,relatime,space_cache=v2,subvolid=5,subvol=/

Why is there a difference?

And a related question,

In /etc/fstab there is an entry:

UUID=3a4d8805-d3df-41d0-ae20-317a658218db /Data           ext3 defaults 
      0       2

But findmnt shows

├─/Data                      /dev/sdb3   ext3        rw,relatime

I noted in "man fstab" the statement

"defaults
           use default options. The default depends on the kernel and
the filesystem. mount(8) does not have any hardcoded set of
           default options. The kernel default is usually rw, suid,
dev, exec, auto, nouser, and async."

What are the kernel and filesystem defaults for Devuan?