It's a quick and dirty Solaris trick, but I better write it down or I'll forget.
When faced with the annoying question: "And what drives are in this box again?", don't get all confused anymore, and call format(1) to the rescue.
$> format Searching for disks...done AVAILABLE DISK SELECTIONS: 0. c0t0d0 <IBM-DXHS18Y-0430 cyl 8152 alt 2 hd 20 sec 218> /pci@1f,4000/scsi@3/sd@0,0 1. c0t1d0 <IBM-DXHS18Y-0430 cyl 8152 alt 2 hd 20 sec 218> /pci@1f,4000/scsi@3/sd@1,0
Certainly not exactly what it was intended for, but it worked for me and I hope I never forget it again.