Quantum QXS G2 Series, Руководство по установке и обслуживанию оборудования

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System Overview 39
RAID Controller and Expansion IOMs
This section describes the RAID controllers and expansion IOMs used in QXS-G2-312, QXS-G2-324,
QXS-G2-412, QXS-G2-424, and QXS-G2-484 systems. They are mechanically and electrically
compliant to the latest SBB v2.1 specification.
The diametric rear orientation in
Figure 44 shows a 4-port FC/iSCSI controller module aligned for use
in the top controller module slot located on the 2U chassis rear panel. The controller module is also
properly aligned for use in either controller slot located on the 5U chassis rear panel.
Figure 44 provides an illustration of the CNC controller (FC/iSCSI) for the 2U12, 2U24, and 5U84
chassis.
Figure 44 CNC Controller CRU
Each controller module maintains VPD (Vital Product Data) in EEPROM devices, and are
interconnected by SBB-defined I2C 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 chassis. A system
alarm occurs when incompatible configurations are detected.
12Gb/s Controller LEDs
The diagrams with tables that immediately follow provide descriptions for the different controller
modules that can be installed into the rear panel of a RAID chassis. Showing controller modules
separately from the chassis enables improved clarity in identifying the component items called out in
the diagrams and described in the companion tables within the figure/table ensembles.
NOTE: Consider the following when viewing RAID controller or expansion IOM diagrams appearing
on the following pages:
• In each diagram, the canister is oriented for insertion into the top controller/IOM slot (A) of 2U
chassis.
• When oriented for use in the bottom controller/IOM slot (B) of 2U chassis, the controller/IOM
labels appear upside down.
• In each diagram, the canister is oriented for insertion into either controller/IOM slot of 5U84
chassis.