Dualboot and ZFS

[Victor Sudakov]

Marko Turk wrote:
> > >  
> > > > zroot/usr is not below zroot/ROOT/some_test_be, but somehow it's
> > > > there in the BE.  Can you please explain this?
> > > 
> > > Hi,
> > > 
> > > that's because zroot/usr is not mounted (check 'zfs get all zroot/usr').
> > 
> > Yes, I know it's not mounted (canmount=off), but it's not a child
> > dataset of zroot/ROOT/some_test_be, and yet it's somehow within
> > zroot/ROOT/some_test_be when the BE was cloned by beadm.
> 
> Hi,
> 
> since zroot/usr is not mounted, path /usr/bin/* in the filesystem
> belongs to dataset zroot/ROOT/some_test_be 

But why is that? This must be witchcraft :-)

Why does it not belong to dataset "zroot", or dataset
"zroot/ROOT/some_other_great_be"? 

Is it because zroot/ROOT/some_test_be is mounted on / ?

> so that's why the files are
> there.
> 
> E.g.:
> $ df -h /usr/bin/
> Filesystem            Size    Used   Avail Capacity  Mounted on
> zroot/ROOT/default    504G     19G    485G     4%    /
> 

Very demonstrative, thank you, but what makes "zroot/ROOT/default" and
not any other dataset the container for the files in /usr/bin/ ?


-- 
Victor Sudakov,  VAS4-RIPE, VAS47-RIPN
AS43859