4 ms·
"When the -u flag is specified, fstyp also recognizes certain additional metadata formats that cannot be handled using mount(8), such as geli(8) providers, and
by vogon_laureate 9y ago
"When the -u flag is specified, fstyp also recognizes certain additional metadata formats that cannot be handled using mount(8), such as geli(8) providers, and ZFS pools."
https://www.freebsd.org/cgi/man.cgi?query=fstyp https://www.freebsd.org/cgi/man.cgi?query=fstyp