User's Guide

72
Emergency power off (EPO)
In case of an accident or an environmental disaster/problem, such as fire/ earthquake, secondary disaster
should be prevented by shutting down the power of computers, uninterruptible power supply system (UPS)
and/or air conditioners by emergency power off (EPO). In the event of emergency requiring power-off of
units and devices, perform EPO.
Note that there is a risk of data corruption when an EPO is performed. Therefore, it is necessary to
clearlydefine ¥scenarios for performing an EPO. Thoroughly test your system with conditions for and tasks
to be performed for an EPO, including notification of all concerned.
Observe the following instructions to use the Blade Enclosure safely. Failure to
follow these instructions may result in serious personal injury.
See pages 4 to 14 for details.
 Perform EPO quickly in case of emergency. Clearly define scenarios to
perform EPO in advance. Thoroughly test your system with conditions for and
tasks to be performed for an EPO, including notification of all concerned.
 Place the power supply tap in a noticeable place that is easy to access so that
power can be shut down in an emergency. If you install power outlets and
make them available inside the rack, ensure to make them easily accessible in
case of emergency. Installation procedures depend on the power outlet/tap.
Install them appropriately according to the instructions on their user’s guide.
If you connect the power cable directly to a power distribution board or an
UPS, place the power cable closer to the rack with the distribution board or the
UPS are installed and make them easily accessible for operations. If the UPS
is rack-mount, make them easily accessible to the inside of the rack in case of
emergency.
IMPORTANT:
 Data may be corrupt when emergency power off is performed.
 Establish appropriate connections compatible to the power unit and the power cable to use.