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Drive Channel
Redundancy for
the E2660
Controller-Drive
Tray
Each controller in a E2660 controller-drive tray has one drive port. When a
controller-drive tray has two controllers, the drive port on controller A and the drive
port on controller B form a redundant pair. The following figure shows the drive ports
on a dual-controller configuration.
NOTE To maintain data access in the event of the failure of a controller, an ESM, or
a drive channel, you must connect a drive tray or a string of drive trays to both drive
expansion ports on a dual-controller configuration.
Figure 8 Redundant Path Pair on the E2660 Controller-Drive Tray
1. Controller A
2. Controller B
3. SAS Drive Expansion Connector (Connectors 3 and 4
c
o
mprise a redundant path pair)
4. SAS Drive Expansion Connector (Connectors 3 and 4
co
mprise a redundant path pair)
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