Once, I installed normally Solaris on my computer, and did not use all the space available on the hard drive. So, I decided to use the rest to install a Debian Linux.
But then, when I want to boot to the new Debian Linux, I didn't see anymore the solaris boot prompt.
So, I search a little on internet how to boot again on the solaris system, as I didn't erase anything within the solaris partition.
I only add to :
of grub, these 4 following lines :
title Solaris rootnoverify (hd0,0) makeactive chainloader +1
Don't forget, to adapt the line :
to correspond where your solaris partition is. In this case, solaris was on the first partition of the first disk, so 0,0.