I/O module
Overview
This user guide describes the 12Gb/s SAS I/O module. Blank modules must be put in all empty SBB slots.
The system operates from one module with a dummy module providing airflow control in the other slot. Module presence is checked against the (initial power-on) configuration to determine invalid configuration conditions.
12Gb/s SAS I/O Module LEDs
| Condition | Activity LED (green) | Fault LED (amber) |
| No Cable Present | Off | Off |
|
Cable Present All links up, no activity. |
On | Off |
| Cable Present All links up. | Flash with aggregate port activity | Off |
|
Critical Fault Any fault which causes operation of the cable to cease or fail to start, e.g. over current trip. |
Off | On |
|
Non-Critical Fault Any fault which does not cause the connection to cease operation, e.g. not all links established over temperature. |
Flash with aggregate port activity | Flashing - 1s on 1s off |
| LED | State | Description |
| Module Fault (amber) | On | A fault condition. |
| Off | Module is operating normally. | |
| Power (green) | On | Module powered. |
| Off | No power. | |
| ID (blue) | On | Controller being identified. |
The I/O module has three mini-SAS-HD (SFF-8644) connector receptacles. By default each is configured as a SAS-3 universal port.
Blank I/O modules
Blank I/O modules are provided and must be put in any vacant I/O module bay to make sure of airflow and correct operation.
