Overview; Locating The Defective Power Supply - EMC Avamar Data Store Gen4T Customer Service Manual

Replacing a Power Supply

Overview

Locating the defective power supply

EMC Avamar Data Store Gen4T Customer Service Guide
26
This procedure describes how to replace a power supply in a Gen4T node.
Each ADS Gen4T node contains two power supplies, the second serving as a redundant,
hot-swappable power source. The node requires at least one power supply to operate
normally. The node is in redundant mode when two power supplies are installed and
both power supplies are connected to an AC power source. If either power supply fails, it
can be replaced during normal system operation.
Note
When removing a power supply from a powered-on node, remove only one power supply
at a time.
Each power supply has three LEDs located on the rear face: AC Good, DC Good, and
Attention. These are the top, middle, and bottom LEDs, respectively.
During normal operation, the AC Good and DC Good LEDs illuminate green to indicate that
AC and DC power are within specification. If a power supply fails, the Attention LED
illuminates amber to indicate a fault.
Before performing the following procedure, obtain the following information about the
Avamar system or node, as applicable:
The fully qualified domain name of the Avamar server
l
The service tag or serial number of the Avamar node with the defective power supply
l
The IP address of the Avamar node with the defective power supply
l
Note
If you do not have this information, contact EMC Technical Support before continuing.
To avoid inadvertently damaging sensitive electronic circuits in the equipment, ensure
that you follow precautions and general safety procedures when removing, installing, or
storing CRUs. See General information for removing and installing CRUs on page
After locating the node requiring service, verify which power supply must be replaced by
performing the following:
Before you begin
CAUTION
Ensure that you correctly locate the defective power supply. Removing the wrong power
supply may abruptly power off the node and cause numerous problems.
Procedure
1. Using PuTTY, the IP address of the node, and a computer on the customer network
with access to the node, establish an SSH session to the node.
2. Log in as the admin user.
3. Change to the root user by typing:
su -
13.