Hardware Element Overview; Esm (Electronic Service Module) Canister; Overview; Esm Canister Led/Button - Lenovo ThinkSystem D4390 Hardware Installation And Maintenance Manual

3 Hardware Element Overview

NOTE: The ESM, PSU, Fan Modules, HDD and DC-DC module are all hot-pluggable.
WARNING: Users should replace the drives one at a time. It is not recommended to remove multiple drives at the
same time.
WARNING: The hardware element replacement maximum time is the period from removing the hardware element
to installing a new one. Please refer to the following:
●
Canister replacement maximum time is 10 minutes.
●
PSU replacement maximum time is 10 minutes.
●
System fan module replacement maximum time is 10 minutes.
●
DC-DC module replacement maximum time is 10 minutes.
●
Drive replacement maximum time is 10 minutes.
For safety reasons, it is recommended that the equipment should be installed following the flow chart.
Figure 3-1: Flow chart
●
Pull out Chassis from Rack: see section
●
Push Chassis into Rack: see section
3.1

ESM (Electronic Service Module) Canister

3.1.1 Overview

The canister module provides external SAS connectivity for the four (4) Mini-SAS HDs from the rear of the chassis
and provides four external SAS 4 lane Mini-SAS HD (SFF-8674) connectors, a RS-232 serial port (audio jack),
and eleven status LEDs.

3.1.2 ESM Canister LED/Button

Refer to the picture below for the ESM canister viewed from the rear of the chassis. There are eleven LEDs and a
button on the canister face.
2.7.1 .
2.7.3 .
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