Mount the correct targets on the correct drives.

You are trying to mount sd0 on target id=1.
It can't equate that so does not find it correctly.
Redo your drive id's to match sd0 and sd1.
On the sun's of the classic and earlier style,
set the hardware id's to sd0 for the boot drive
and sd1 for the other drive.  That assumes you
use id=0 and id=1 respectively. On the funky things
that autoid at 3 and 1 for drives 0 and 1, you have
to use the kernel with the scsi3 id set to zero and
the rest hardwired (e.g., ss4's, ss5's and that ilk).

Good luck....(:+}}...

Bob Keys

(Been there, done that, many times.... only to
chuckle at meself, when I see that.)