Powering A Storage Unit On And Off (Real-Time Only); Unit Emergency Power Off (Uepo) Switch - IBM DS8000 User Manual

Powering a storage unit on and off (real-time only)

Complete this task to power on or power off a storage unit, bringing it online or
taking it offline, respectively.
1. In the navigation, select Real-time manager → Manage hardware → Storage
2. In the Select Action drop-down list, select Power Control The Control mode
3. To enable the power on and off button for the following steps, set the Current
4. Click Apply and then click on the Power on/off option in the left navigation
5. The button label depends on the current state of the storage unit. If the storage
6. To change the state, press the power button. A confirmation message is
7. Once the process is complete, click OK to close the page.

Unit emergency power off (UEPO) switch

The UEPO switch is the red switch located on the rack operator panel. It must be
used with extreme caution and only when the power must be dropped
immediately for a safety concern.
The UEPO switch immediately shuts off all power to the machine. So, when the
UEPO switch is turned off, all data not written to disk is lost and not recoverable.
Note: Using this switch often results in data loss.
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DS8000 User's Guide
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 during the time that 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.
units. On the Storage units — Main Page, select the storage unit that you want
to power on or off.
page is displayed.
power control mode to Remote and set the Set remote power control mode to
Remote management console manual.
pane. The Power on/off page is displayed.
unit is currently off, this button has a label of "Power on". If the storage unit is
currently on, this button has a label of "Power off". If you open this page while
the storage unit is in the process of powering on or powering off, this button is
disabled.
displayed that asks you if you want to proceed. If you choose to continue, the
power button is disabled and displays the label that is the opposite state of the
box until the storage unit is completely powered on or off. A progress bar is
displayed by the button to indicate that the process is working.