NetApp FC4600 Hardware Cabling Manual page 154

Drive cabling
topologies for
the E2660
Controller-Drive
Tray
Drive cabling
topologies for the
E2660
Controller-Drive
Tray With DE6600
Drive Trays
144
This section provides examples of drive cabling topologies for the E2660
controller-drive tray. The E2660 controller-drive tray can be connected only to
DE6600 drive trays. The total number of drives in the storage array, including the
drives in the controller-drive tray and those in the drive trays, must not exceed 192.
NOTE Simplex systems do not provide redundant connections to drive trays. If a
connection or an environmental services module (ESM) fails, all drive trays that
connect to the controller-drive tray indirectly through the failed connection or drive
tray will become inaccessible.
Depending on the number of drive trays that you need to connect, see the applicable
figure for a cabling topology. Each example shows a duplex controller-drive tray
configuration with redundant paths to the drive trays. For a simplex controller-drive
tray configuration, use the cabling topology shown for controller A in the applicable
figure.
WARNING (W15) 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.
NOTE Install 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.