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To perform a system restart, you can switch the power off and then on again using the momentary-contact START/STOP switch on the back panel of the system, or issue the sysconf appliance reboot command.
To switch off the system, you can issue the sysconf appliance poweroff command, or use the START/STOP switch on the SafeNet Network HSM back panel. If you issue the poweroff command, the system requests that you confirm by typing "proceed". After you type "proceed", the system returns a success message. From that point the orderly 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 back-panel START/STOP switch, which forces an immediate shutdown. This should not normally be required, and should never be done unless it is required, since it bypasses the normal, graceful file-system closing and shutdown procedure.
The commands sysconf appliance reboot and sysconf appliance poweroff are preferred when you have easy physical access to the appliance, because they perform orderly shutdown, but you can access the START/STOP button if the commands fail.
For situations where you do not have convenient local access to the START/STOP button on the appliance, the preferred command choice is sysconf appliance hardreboot.
•The disadvantage is that the shutdown is abrupt and not orderly - in a constrained and hardened system like SafeNet Network HSM, any risk is minimal, but not zero.
•The advantage of using the hardreboot is that, with many services and file closures being bypassed, there are far fewer opportunities for a shutdown or reboot sequence to hang in an unrecoverable state. You avoid the risk incurred by remotely using one of the other "softer" commands when there is no convenient access to the physical button override in the event that the command fails.
If the appliance was deliberately powered down, using the START/STOP switch or the poweroff command, then it should remain 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 should restart 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.