Overview

The canister module provides external SAS connectivity for the four (4) Mini-SAS HDs from the rear of the canister and provides four external, four-lane Mini-SAS HD(SFF-8644) connectors, a RS-232 serial port (audio jack), and eleven status LEDs.

ESM Canister LEDs and Button

Refer to the image below for the ESM canister front view. There are eleven LEDs and one button on the canister face.

Below is the description for each LED and the button:

• No.1: Power LED (Green)
  • On – ESM Power LED
  • Off – ESM Power is off
• No.2: Fault LED (Amber)
  • On – Fault conditions exist in ESM
  • Off – Normal operation
• No.3: Identify LED-UID (Blue)
  • On – ESM identify LED
  • Off – Normal operation

• No.4/No.6/No.9/No.11: ESM Mini-SAS HD link status LED (Green)
  • Steady On – Linked
  • Blink – data transfer
  • Off – No Link
• No.5/No.7/No.8/No.10: ESM Mini-SAS HD link fault LED (Amber)
  • On – Link fault
  • Off – Normal
• No.12: Power button of each ESM to control power on/off
  • ESM status is on, press power button >=4s to turn off
  • ESM status is off, press power button <1s to turn on

Mini-SAS HD Port

There are eight Mini-SAS HD ports on the XD4090-S4 system, each canister has four ports.

• Four Mini-SAS HD ports for JBOD upstream/downstream connection
• 12G SAS 4X wide port
• Support passive cable

Debug Port

There is a console port on each canister for software debug with 3.3V TTL serial port with 3.5mm audio jack connector.

ESM Debug Commands