I/O Modules

The I/O module is a component that controls how the controller and the drives interact.

The I/O module is connected to the DA port of the controller or an I/O module on another drive enclosure. A drive enclosure has two I/O modules.

I/O modules have ports and LEDs.

Figure: 2.5" NVMe Type I/O Modules
Figure: 2.5" SAS Type / 3.5" SAS Type I/O Modules

  1. Backend (IN) port

    This port is used to connect between enclosures.

  2. Backend (OUT) port

    This port is used to connect between enclosures.

The LEDs turn on or blink to indicate the statuses that are listed below.

Table: Status and Meaning of Each LED (I/O Module [Drive Enclosure])

LED name

LED status

Meaning

BACKEND (IN) LINK

(green)

The link between the backend (IN) port and the source port has been established.

BACKEND (IN) FAULT

(amber)

  • The link between the backend (IN) port and the source port is in error status.

  • The ports to disconnect the cables are indicated. This occurs while a drive enclosure is being added.

(blinks amber)

The ports to connect the cables are indicated. This occurs while a drive enclosure is being added.

BACKEND (OUT) LINK

(green)

The link between the backend (OUT) port and the destination port has been established.

BACKEND (OUT) FAULT

(amber)

The link between the backend (OUT) port and the destination port is in error status.

(blinks amber)

The ports to connect the cables are indicated. This occurs while a drive enclosure is being added.

READY

(green)

The I/O module is in normal status.

IDENTIFY

(blinks blue)

The installation location of the I/O module is identified according to the instruction that is issued from ETERNUS Web GUI or ETERNUS CLI.

FAULT

(amber)

The I/O module is in error status.