IBM DS3500, Installation, User'S, And Maintenance Manual

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Controller connectors (with SAS host port adapters)
Figure 3-4 shows the optional SAS host port adapter installed in both controllers at the rear of the DS3500
storage subsystem.
SAS host ports
The DS3500 SAS host ports are each a x4 multilane, 6 Gbps universal mini-SAS port. Connect a
SAS cable from your host system SAS host bus adapter to a host port on each controller.
Drive expansion port
The drive expansion port is a x4 multilane SAS port. Connect a SAS cable to this port and to a
drive storage enclosure.
Enclosure ID settings
The enclosure ID is a unique two-digit identifier for each enclosure in the storage subsystem
configuration. In a dual controller or ESM configuration, both enclosure IDs are identical under normal
operating conditions. Each EXP3500 storage storage enclosure and DS3500 storage subsystem in the
storage subsystem configuration must have a unique storage enclosure ID.
The controller automatically sets the enclosure ID. You can change the setting through the Storage
Manager software, if necessary. The range of supported enclosure ID settings is 0 through 99. The
enclosure ID is normally set to a value of 00 at the factory.
The enclosure ID is displayed on the seven-segment numeric display located on the back of each
controller and ESM.
Working with SAS cables
Each DS3500 storage controller has up to four x4 multilane SAS host ports and a single x4 multilane SAS
port for drive channel connections.
Use a 1M or 3M (1-meter or 3-meter) SAS cable with a mini-SAS 4x multilane SAS connector on each end
to connect a controller host port to a host HBA and to connect the drive expansion port to a storage
enclosure.
The following illustration shows the 1M and 3M mini-SAS cable.
Serial port
Ethernet ports
SAS host port 1
SAS host port 2
SAS host port 3
Controller A
SAS host port 4
Drive expansion port
Seven-segment
numeric display
Controller B
Figure 3-4. Dual-controller DS3500 storage subsystem ports and controllers (with an optional SAS host port adapter)
Chapter 3. Cabling the storage subsystem and storage enclosure
3-3