the cabinet so that the cabinet does not become top-heavy. A top-heavy cabinet has a greater riskof falling over.Drive tray cabling topologies for the E5660 controller-drive trayThe figures in this section show representative cabling configurations. The configurations shownguarantee that redundant data paths exist between the controller-drive tray and all attached drive traysin a storage array. These controller-drive trays can be cabled to SAS2 drive trays (DE1600, DE5600,and DE6600), or various combinations of those three models of drive tray. You can cable E5660controller-drive trays to SAS3 drive trays (DE212C, DE2124C, and DE460C).Configurations that include SAS3 drive trays require cables with a mini-SAS connector on one endand a mini-SAS HD connector on the other end. Use these cables to connect between controllers andSAS-3 drive trays or between a SAS-2 drive tray and a SAS-3 drive tray. The mini-SAS HDconnectors attach to the IOMs in the SAS3 drive trays, while the mini-SAS connectors attach to theESMs in SAS2 drive trays or to the controllers in the controller-drive tray. If your configuration has amix of SAS2 and SAS3 drive trays, group the SAS3 drive trays together at the bottom or the top ofthe stack.Caution: Risk of bodily injury – An empty tray weighs approximately 56.7 kg (125 lb). Threepersons are required to safely move an empty tray. If the tray is populated with components, amechanized lift is required to safely move the tray.Note: To ensure cabinet stability and guarantee the lowest possible center of gravity, install only60-drive trays (E5560 controller-drive trays, DE660 drive trays, or DE460C drive trays) at thebottom of the cabinet, and install any 12-drive trays or any 24-drive trays above all 60-drive trays,with no empty space. A top-heavy cabinet has a greater risk of falling over.For any one controller-drive tray, you must not exceed the limit of 15 connected drive trays or thelimit for the total number of drive slots in the storage array. You are notified through the Major EventLog (MEL) if you attempt to install drive slots in excess of the limit for your storage array. Contacttechnical support if this occurs.When you cable the storage array, keep these points in mind:• To connect an ESM/IOM to a controller-drive tray, use both of the SAS in ports on the ESM ortwo of the SAS expansion ports on an IOM. Connect one SAS in port (or SAS expansion port) toa SAS Expansion port on controller A and the other SAS in port (or SAS expansion port) to aSAS Expansion port on controller B in the controller-drive tray.• To connect two drive trays, connect a SAS Expansion port on an ESM/IOM in one drive tray toone of the SAS in ports on an ESM or one of the SAS expansion ports on an IOM in the otherdrive tray. Do not connect both SAS in ports on one ESM to other drive trays.80 |
