You must upgrade the Sun Blade 6000 Disk Module firmware of your SAS1 components (SAS1 NEMs and disk modules) to a firmware version that supports SAS1 and SAS2 coexistence. This upgrade must be done before you insert a SAS2 component such as this NEM into the chassis.
Refer to the SAS1/SAS2 Compatibility Upgrade Guide and NEM software release links for details on which devices require the upgrade, how to obtain the firmware, and how to perform the upgrade.