these are solaris commands and he doesn't even see the disks on OBP level!

@OP
what is the OBP firmware level of the machine (try banner command) and what kind of harddrives do you use? have you tried to run "reset-all" and after that the "probe-scsi-all" again? also try the "probe-fcal-all" command to find your disks... if you'll find your disks, use the "boot -r" command to reconfigure your /dev and /devices entries. or use "boot cdrom" to install a new solaris instance.

good luck