# scdidadm -l d20
20       phys-schost-2:/dev/rdsk/c3t2d0 /dev/did/rdsk/d20
# scdidadm -o diskid -l c3t2d0
5345414741544520393735314336343734310000
# prtvtoc /dev/rdsk/c3t2d0s2 > /usr/tmp/c3t2d0.vtoc 
...
# devfsadm
# fmthard -s /usr/tmp/c3t2d0.vtoc /dev/rdsk/c3t2d0s2
# scswitch -S -h node1
# shutdown -y -g0 -i6
...
# scdidadm -R d20
# scdidadm -o diskid -l c3t2d0
5345414741544520393735314336363037370000
# scdidadm -ui