Reboot the Appliance

Power On

On the back panel, ensure that the power supplies are connected and working - the green LED on each power supply glows steadily when in operation.

If the appliance does not immediately begin to start up, press and release the START/STOP switch on the front panel.

The appliance begins to power up.

If power was removed while the system was on (either a power failure, or the power cable was disconnected), the system restarts without a button press. This behavior allows unattended resumption of activity after power interruption.

The front-panel LCD begins showing activity, then settles into the ongoing system status display once the appliance has completed its boot-up and self-test activity.

Power Off

To power-off the appliance locally, press and release the START/STOP switch. Do not hold it in. The appliance then performs an orderly shutdown (that is, it closes the file system and shuts down services in proper order for the next startup). This takes approximately 30 seconds to complete. In the unlikely event that the system freezes and does not respond to a momentary “STOP” switch-press, then press and hold the START/STOP switch for five seconds. This is an override that forces immediate shutoff.

To switch off the appliance from the console command line, use the command sudo poweroff.

Reboot

To perform a system restart, you can switch the power off and then on again using the momentary-contact START/STOP switch on the front panel of the system, or issue the sudo reboot command.

To switch off the system, issue the sudo poweroff command, or use the START/STOP switch on the appliance front panel:

• If you issue the poweroff command, the graceful shutdown takes 15 to 20 seconds

• After you momentarily press and release the START/STOP switch, the system performs a graceful shutdown, which takes 15 to 20 seconds.

If the system does not appear to be properly shutting down, then press and hold the front-panel START/STOP switch, which forces an immediate shutdown. This is not normally required, and should never be done unless it is required, since it bypasses the normal, graceful file-system closing and shutdown procedure.

Automatic Restart Following a Power Interruption

If the appliance was deliberately powered down, using the START/STOP switch or the sudo poweroff command, it remains off until you press the START/STOP switch. However, if power was removed while the system was on (either a power failure, or the power cables were disconnected - not good practice), then the system restarts without a button press.

This behavior allows unattended resumption of activity after power interruption. In most cases, it is assumed that this would never be needed, as you would install the appliance with its two power supplies connected to two completely separate, independent power sources, at least one of which would be battery-backed (uninterruptible power supply) and/or generator-backed.