Originally set in bios boot section to boot from sata disk. I had my IDE disk which was originally my boot device disconnected.
I want to mirror my boot disk so use both IDE and SATA disk when I connected the power again and tried to boot up It didn’t wanted to boot. Although it still sees my SATA disk as first boot device It apparently wants to boot from IDE no matter what.
In order to boot from SATA and having the IDE disk powered and connected It was mentioned I should disable the device in the main menu where it was recognized by BIOS auto detection. I changed the value into Not installed.
That did the trick, If I do a format the disk is seen by Solaris. So now I can setup the disk as mirror for my boot drive.