The following restrictions and requirements have been added or updated since the Sun Cluster 3.0 GA release.
Hardware Restrictions and Requirements
Disks in the Sun StorEdge A3500 or A3500FC cannot be used as quorum devices. You must have another storage device for the quorum disks.
If you are using Sun Enterprise 420R servers with a PCI-card in slot J4701, the motherboard must be at dash-level 16 or higher. (501-5168-16 or higher). Refer to the E420R Product Notes for additional information.