Module Fault LED (amber)
LED turns amber when experiencing a system hardware fault. This LED helps you identify the component causing the fault, which can be
associated with a Fault LED on a PSU, FCM, IOM, DDIC, or drawer.
Logical Status LED (amber)
This LED indicates a change of status or fault from something other than the enclosure management system. This may be initiated from
the controller module or an external HBA. The indication is typically associated with a DDIC and LEDs at each disk position within the
drawer, which help to identify the DDIC affected.
Drawer Fault LEDs (amber)
This LED indicates a disk, cable, or sideplane fault in the drawer indicate: Top (Drawer 0) or Bottom (Drawer 1).
Controller and expansion modules
This section describes the IOMs used in 12 Gb/s storage enclosures. They are mechanically and electrically compliant to the latest SBB v2.1
specification.
The rear orientation in
Figure 30. Controller module – rear orientation
shows a 4-port FC/iSCSI controller module aligned for use in the top
IOM slot located on the 2U enclosure rear panel. The controller module is also properly aligned for use in either IOM slot located on the
5U84 enclosure rear panel.
Figure 30. Controller module – rear orientation
Each controller module maintains VPD (Vital Product Data) in EEPROM devices. In a dual-controller system, controller modules are
interconnected by SBB-defined I2C buses on the midplane. In this way, the SBB module can discover the type and capabilities of the
partner SBB module(s), and vice versa, within the enclosure.
12 Gb/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 ME4 Series controller enclosures. 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.
NOTE:
Consider the following when viewing the IOM diagrams on the following pages:
Storage system hardware
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