How to boot to floppy or get to bios on Sparcserver 5?

[Crisis]

We came across an old Sun Sparcserver 5 here, and seems a drive is a bit corupt, and we don't know the root password. I want to boot to an Open BSD floppy and wipe the drives and do a clean install. I am not familiar with Sun, however, anybody know how to get to the bios when teh machine boots, or what to do to make it boot to the floppy? Thanks!