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4.10.3 UPS
By enabling UPS (Uninterruptible Power Supply) support, you can protect your NAS from
abnormal system shutdown caused by power disruption. There are two options provided
on the "UPS" page for the NAS during a power failure: 1) turn off the server after the AC
power fails, or 2) enter the auto-protection mode after the AC power fails. For option 1,
the NAS will shut itself down after the specified time. For option 2, the NAS will stop all
running services and unmount all volumes to protect your data after the specified time.
For details on NAS behavior during a power failure, refer to the "Behavior of the UPS
Feature of the NAS" section. Please note that to protect your data, once the power
outage starts, the NAS will automatically turn itself off or enter auto-protection mode
(depending on your settings) after 30 seconds regardless of the specified time for either
of the above options if the remaining UPS battery charge is < 15%.
In this chapter, the following topics are covered:
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Behavior of the UPS Feature of the NAS
USB M ode s
Sta nda lone M ode – USB
To operate under USB standalone mode, follow the steps below:
1. Plug in the USB cable on the UPS to the NAS.
2. Choose between whether the NAS will shut down or enter auto-protection mode after
the AC power fails. Specify the time in minutes that the NAS should wait before
executing the option you have selected. After the NAS enters auto-protection mode,
the NAS resumes the previous operation status when the power restores.
3. Click "Apply All" to confirm.
Standalone Mode – SNMP
To operate under SNMP standalone mode, follow the steps below:
1. Make sure the NAS is connected to the same physical network as the SNMP-based
UPS.
2. Select "APC UPS with SNMP management" from the "Protocol" drop down menu.
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