A system contains the factory-installed JumpStart software. (This applies to some SPARC systems only).  

rootdisk is set to the disk that contains the factory-installed JumpStart software before the system tries to match any rules.

rootdisk has not been set and a workstation tries to match the following rule:

disksize rootdisk size_range

or 

installed rootdisk version

rootdisk is set to c0t3d0 or the first available disk attached to the workstation.

After rootdisk is set, the workstation tries to match the rule.

If rootdisk has been set and the workstation tries to match the following rule.

disksize rootdisk size_range

or 

installed rootdisk version

The workstation tries to match the rule. 

A workstation tries to match the following rule: 

installed disk version

If disk is found on the workstation with a root file system that matches the specified version, the rule matches and rootdisk is set to disk.

A workstation tries to match the following rule:

installed any version

If any disk is found on the workstation with a root file system that matches the specified version, the rule matches and rootdisk is set to the found disk. (If there is more than one disk on the workstation that can match, the workstation will match the first disk that is found.)

rootdisk has not been set after a system matches a rule and the system is going to be upgraded (which is defined in the profile).

rootdisk is set to the first disk found with a root file system that matches an upgradable version of Trusted Solaris software. If no disk is found, the system proceeds with an interactive installation.

rootdisk has not been set after a workstation matches a rule.

rootdisk is set to c0t3d0 or the first available disk attached to the workstation.