That secondary boot is on your disk. If you have more than one, then you
need to tell the EEPROM which one to boot from; it's the "boot-device" and
you can set it to some other disk with the "setenv" command in the prom
monitor.

Assuming you did a clean install of Solaris, I can't imagine that it didn't
set up a boot sector of its own on the disk you installed it on...

	Erik