The following power controls can be configured by an IBM service support
representative. You can also use the following power controls through the DS
Storage Manager (running on the Management Console):
v Local power control mode
(Visible in the DS Storage Manager) You cannot change this setting in the DS
Storage Manager. This mode is enabled when the local/remote switch on the
storage unit is in the local position. When this setting is used, the local power
on/local force power off switch on the storage unit controls the power. Planning
requirements: None.
v Remote power control mode
(Visible in the DS Storage Manager)If you select the Remote power control
mode, you choose one of the following remote mode options. Planning
requirements: If you choose the Remote zSeries Power Control options, you
must have the remote zSeries power control feature. There are no requirements
for the other options.
– Remote Management Console, Manual: Your use of the DS Storage Manager
power on/off page controls when the unit powers on and off.
– Remote Management Console, Scheduled: A schedule, which you set up,
controls when the unit powers on and off.
– Remote Management Console, Auto: This setting applies only in situations in
which input power is lost. In those situations, the unit powers on as soon as
external power becomes available again.
– Remote Auto/Scheduled: A schedule, which you set up, controls when the
unit powers on and off. A power on sequence is also initiated if the unit was
powered off due to an external power loss while the units are scheduled to be
on and external power becomes available again.
– Remote zSeries Power Control: One or more attached System z or S/390
hosts can control the power on and power off sequences.
Power outlet requirements
Plan for the required power outlets when planning for the installation of your
storage units.
The following power outlets are required:
v Two independent power outlets for the two DS8000 power cords needed by each
base model and expansion model.
Important: To eliminate a single point of failure, the outlets must be
independent. This means that each outlet must use a separate power
source and each power source must have its own wall circuit
breaker.
v Two outlets that are within 3.1 m (10 ft.) of the external management console.
Typically, these outlets are in a rack that you provide.
Input voltage requirements
When you plan for the power requirements of the DS8000 series model, consider
the input voltage requirements.
The DS8000 storage unit can support voltages that range from 200 V ac to 480 V ac
nominal (180 to 508 V ac).
Table 54 on page 162 provides the input voltages and frequencies that the DS8000
storage units support. Inputs are balanced and either single or three phase.
Chapter 6. Meeting DS8000 series delivery and installation requirements 161
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