Chapter 3 Connections
3.5 Power Synchronized Connections
ETERNUS DX80 S2/DX90 S2 Disk storage system User’s Guide -Site Planning-
Copyright 2013 FUJITSU LIMITED P3AM-4822-12ENZ0
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3.5 Power Synchronized Connections
This section describes connections to automatically control powering the ETERNUS DX Disk storage system on
and off with a server.

■Power synchronized unit

A power synchronized unit enables the ETERNUS DX Disk storage system to be powered on and off with a
server. The power synchronized unit detects changes in the AC power output of a UPS unit that is connected to
a server (server UPS unit) and automatically turns on and off the ETERNUS DX Disk storage system. In addition
to server UPS units, units that control the AC socket power output can also be connected. When three or more
servers are connected, power can be synchronized by adding an AC sensor unit.
The power synchronized unit detects the AC power output of the target devices for power synchronization and
commands the ETERNUS DX Disk storage system to synchronize the power with the target devices.
When the power synchronized unit detects the AC power output of any server UPS unit, the power
synchronized unit commands the ETERNUS DX Disk storage system to turn on.
When the power synchronized unit does not detect AC power output in any of the server UPS units, the power
synchronized unit commands the ETERNUS DX Disk storage system to turn off.
The server UPS unit must have a function in the management software that controls the AC power output
according to when the server powers on and off. The server UPS unit must have one unused outlet to connect
to the power synchronized unit.

WARNING

Do
•In order to control powering the ETERNUS DX Disk storage system on and off
with servers, the power control of the ETERNUS DX Disk storage system must
be linked with all of the connected servers. If some of the servers are not
linked, data errors may occur in these servers when the ETERNUS DX Disk
storage system is turned off by using power control from the other linked
servers.