Drive Tray Cabling Topologies For The E5560 Controller-Drive Tray And The E5660 Controller-Drive Tray - Quantum StorNext QD7000 Hardware Manual

storage array includes DE6600 drive trays, install those drive trays beginning from the bottom of
the cabinet so that the cabinet does not become top-heavy. A top-heavy cabinet has a greater risk
of falling over.
Drive tray cabling topologies for the E5560 controller-drive tray and the
E5660 controller-drive tray
The figures in this section show representative cabling configurations. The configurations shown
guarantee that redundant data paths exist between the controller-drive tray and all attached drive trays
in 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 E5660
controller-drive trays to SAS3 drive trays (DE2112C, DE2124C, and DE460C).
Configurations that include SAS3 drive trays require cables with a mini-SAS connector on one end
and a mini-SAS HD connector on the other end. Use these cables to connect between controllers and
SAS-3 druve trats ir between a SAS-2 drive tray and a SAS-3 drive tray. The mini-SAS HD
connectors attach to the IOMs in the SAS3 drive trays, while the mini-SAS connectors attach to the
ESMs in SAS2 drive trays or to the controllers in the controller-drive tray. If your configuration has a
mix of SAS2 and SAS3 drive trays, group the SAS3 drive trays together at the bottom or the top of
the stack.
Warning: Risk of bodily injury – An empty tray weighs approximately 56.7 kg (125 lb). Three
persons are required to safely move an empty tray. If the tray is populated with components, a
mechanized lift is required to safely move the tray.
To ensure cabinet stability and guarantee the lowest possible center of gravity, install only
Note:
60-drive trays (E5560 controller-drive trays, DE660 drive trays, or DE460C drive trays) at the
bottom 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 the
limit for the total number of drive slots in the storage array. You are notified through the Major Event
Log (MEL) if you attempt to install drive slots in excess of the limit for your storage array. Contact
technical 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 or
two of the SAS expansion ports on an IOM. Connect one SAS in port (or SAS expansion port) to
a SAS Expansion port on controller A and the other SAS in port (or SAS expansion port) to a
SAS 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 to
one of the SAS in ports on an ESM or one of the SAS expansion ports on an IOM in the other
drive tray. Do not connect both SAS in ports on one ESM to other drive trays.
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