Oracle ZS4-4, Installation Manual

Page: 180 / 212

Powering Off a Controller
Powering Off a Controller
The recommended methods for powering off a controller depend on whether you have
completed initial configuration. Use a power off method from one of the following two
situations.
If you have completed initial configuration, power off the controller using one of the following
methods:
■
Log in to the BUI and click the power icon on the left side under the masthead.
■
SSH in to the appliance and enter the
maintenance system poweroff
command.
■
Use a pen or non-conducting pointed object to press and release the Power button on the
front panel.
If you have not completed the initial configuration steps, power off the controller using one of
the following methods:
■
Use a pen or non-conducting pointed object to press and release the Power button on the
front panel.
■
SSH or use a serial connection to log in to the service processor (SP), and then issue the
command
stop /SYS
.
■
To initiate an emergency shutdown during which all applications and files will be closed
abruptly without saving, press and hold the Power button for at least four seconds until the
Power/OK status indicator on the front panel flashes, indicating that the storage controller is
in standby power mode. To completely remove power, disconnect the AC power cords from
the rear panel of the storage controller.
Related Topics
■
“Powering Off a Disk Shelf” on page 180
■
“Powering On a Controller” on page 179
Powering Off a Disk Shelf
If a disk shelf is a part of a storage pool, powering off or removing all SAS chains from a disk
shelf will trigger a kernel panic on the controller(s) to prevent data loss, unless the shelf is part
of an NSPF (no single point of failure) data pool. To avoid this, shut down the controller(s)
before decommissioning the shelf, as described in “Powering Off a Controller” on page 180 .
1. Place the power supply on/off switches to the "O" off position.
2. Disconnect the power cords from the external power source for the cabinet.
180 Oracle ZFS Storage Appliance Installation Guide • December 2016