Something

root@as:~# mount /dev/dsk/c1d0s1 /mnt
root@as:~# df -h /mnt
Filesystem             size   used  avail capacity  Mounted on
/dev/dsk/c1d0s1         32G   650M    31G     3%    /mnt
root@as:~# umount /mnt
root@as:~# metainit d11 1 1 c1d0s1
metainit: as.sorted.org: /dev/dsk/c1d0s1: not a disk device

root@as:~# metainit -f d11 1 1 c1d0s1
metainit: as.sorted.org: /dev/dsk/c1d0s1: not a disk device