Use the software cd 1 of 2 to recover root password:
boot cdrom -s from ok prompt
mkdir /tmp/a
mount /dev/dsk/c0t0d0s0 /tmp/a
cd /tmp/a/etc
TERM=vt100; export TERM
vi shadow
Delete passwd entry (13 chars) in the line for root.
Use the software cd 1 of 2 to recover root password:
boot cdrom -s from ok prompt
mkdir /tmp/a
mount /dev/dsk/c0t0d0s0 /tmp/a
cd /tmp/a/etc
TERM=vt100; export TERM
vi shadow
Delete passwd entry (13 chars) in the line for root.