Chapter 2 Installing Trays 45
Note – Perform all SAS connections from an Out (down arrow) port to an In (up
arrow) port. If the cable is connected to two connectors with the same arrows,
communication between the two drive trays will be lost.
FIGURE 2-17 Expansion Ports on a Drive Expansion Tray
Array Configuration Naming Convention
The configuration naming convention is “controller trays x trays” where the first
number is the controller tray and the second is the sum of the controller tray and the
number of drive expansion trays. For example, 1x1 is a standalone controller tray,
1x2 is the controller tray and one expansion tray, 1x3 is the controller tray and 2
expansion trays (
TABLE 2-1).
Note – Do not add more expansion trays than the storage array supports.
Use the following instructions to connect the controller tray to one or more drive
expansion trays.
TABLE 2-1 Controller Tray and Drive Expansion Tray Configurations
Configuration Identifier Controller Tray Number of Expansion Trays
1x1 1 0
1x2 1 1
1x3 1 2
1x4 1 3
1. SAS Expansion In Port
2. SAS Expansion Out Port
1
2
2
22
2
2
22
1
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