System Airflow; Controller And Expansion Modules; 12Gb/S Controller Module Leds; Controller Module - Dimetric Rear Orientation - Seagate RealStor 5005 Series Hardware Installation

System airflow

The system must be operated with low pressure rear exhaust installation. Back pressure created by rack doors and
obstacles is not to exceed 5 pascals (0.5mm water gauge). The cooling system provides sufficient capacity to ensure that
maximum temperatures are not exceeded.
IMPORTANT: The environment in which the enclosure operates must be dust-free to ensure adequate airflow.

Controller and expansion modules

This section describes the IOMs used in RealStor 12Gb/s storage enclosures. They are mechanically and electrically
compliant to the latest SBB v2.1 specification.
The dimetric rear orientation in
the top controller module slot located on the enclosure rear panel.
Figure 18 Controller module – dimetric rear orientation
Each controller module maintains VPD (Vital Product Data) in EEPROM devices, and are interconnected by SBB-defined
2
I C buses on the midplane. In this way, the SBB modules can discover the type and capabilities of the partner SBB
module(s), and vice versa, within the enclosure. An enclosure system alarm occurs when incompatible configurations are
detected.

12Gb/s controller module LEDs

The diagrams with tables that immediately follow provide descriptions for the different controller modules that can be
installed into the rear panel of an 5005/4005 Series controller enclosure. Showing controller modules separately from the
enclosure enables improved clarity in identifying the component items called out in the diagrams and described in the
companion tables within the figure/table ensembles. In each IOM diagram, the controller module is oriented for insertion
into the top IOM slot (A). When oriented for use in the bottom IOM slot (B), the IOM labels appear upside down.
26 System overview
Figure 18 shows a partial view of a 4-port FC/iSCSI controller module aligned for use in