Changing the Mode on 220S and 221S Enclosures
Ensure that you turn off the enclosure before you click the bus configuration turn on a 220S or 221S enclosure, the enclosure should be powered off. The bus configuration switch is used to change the enclosure to split-bus, joined bus, or clustered mode. If you change the 220S or 221S enclosure mode with the enclosure turned on, the enclosure may no longer be displayed by Storage Management and you may notice erratic behavior. In addition, the bus configuration turn on the enclosures is not rated for frequent toggling.