you could of hit stop - a upon boot to get to your ok prompt.
then as stated above use printenv to show settings.
Is the system in diagnostic mode?
check diag-switch? (it should respond with false...)
if not: setenv diag-switch? false
Your machine was trying to boot from the net and this is the default setting for diag-switch=true. By changing it to diag-switch=false, default would be the disk. (maybe not the correct disk e.g. (disk0, disk1, etc) then edit boot-device disk0 or whatever disk #.
e.g setenv boot-device disk? (where ? is a #, disk = disk0 = scsi id 3)
The following link (sun manuals for ultra 60) willl have most of your answers.
http://www.sun.com/products-n-soluti..._60/index.html
Hope this helps for future references....