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XP128 Hardware 39
Powering down the disk array
Situations may arise in the operation of the disk array that require you to
power down the disk array. These situations include:
• Emergency power-off
• Planned power-off
Emergency power-off
An emergency is a critical situation such as a physical plant catastrophe. In
an emergency, the critical need is to quickly remove power from the disk
array. A quick restart is not necessary.
In an emergency, the operator should trip the Emergency Power-Off (EPO)
switch. The disk array emergency power-off (EPO) switch is located on the
control panel.
Caution Use this switch only in case of an emergency. An HP service representative
is required to reset the EPO and to power-on the disk array.
To power off the disk array in an emergency:
1. Open the control panel cover by pushing on the point marked PUSH.
2. Pull the emergency power-off switch up and then out towards you as
illustrated on the switch. See
Figure 4 on page 37.
3. Call the HP support center. The EPO switch must be reset by an HP
service representative before the disk array can be powered on again.
Planned power-off
There may be times when a site power outage is planned. These situations
would include alterations to the data center, inspections, or work by the
electric company. If a scheduled power outage affects an HP StorageWorks
Disk Array XP128, the power down of the disk array must be scheduled
with a trained HP support representative.