If the system is already installed, connect the disk to the system and perform a reconfiguration boot. 

SPARC: Adding a System Disk or a Secondary Disk (Task Map) or x86: Adding a System Disk or a Secondary Disk (Task Map)

Repartition the disk by using the format utility, if necessary.

SPARC: How to Create Disk Slices and Label a Disk or x86: How to Create Disk Slices and Label a Disk

Create disk volumes, and if needed, create soft partitions by using Solaris Volume Manager. Or, set up a ZFS storage pool. 

Chapter 2, Storage Management Concepts, in Solaris Volume Manager Administration Guide or Creating a ZFS Storage Pool in Solaris ZFS Administration Guide

Create UFS file systems for the new disk by using the newfs command.

SPARC: How to Create a UFS File System or x86: How to Create File Systems

Or, create a ZFS file system.* 

How to Create ZFS File Systems in Solaris ZFS Administration Guide

Clone a disk with an EFI label 

Example 29–2