from abnormal system shutdown caused by power disruption. In the event of a power failure the NAS will shut down automatically or enter auto-protection mode by probing the power status of the connected UPS unit.
Standalone mode – USB
To operate under USB standalone mode, follow the steps below:
| 1. | Plug in the USB cable on the UPS to the NAS. |
| 2. | Select the option “Enable UPS Support”. |
| 3. | Choose between whether the NAS will shut down or enter auto-protection mode after 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. |
| 4. | Click “Apply” 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 the option “Enable UPS Support”. |
| 3. | Choose between whether the NAS will shut down or enter auto-protection mode after 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. |
| 4. | Select “SNMP” from the “Protocol” drop down menu. |
| 5. | Enter the IP address of the SNMP-based UPS. |
| 6. | Click “Apply” to confirm. |
Network master mode
A network UPS master is responsible for communicating with network UPS slaves on the same physical network about critical power status. To set up your NAS with UPS as network master mode, plug in the USB cable on the UPS to the NAS and follow the steps below:
| 1. | Make sure the NAS is connected to the same physical network as the network UPS slaves. |
| 2. | Select the option “Enable UPS Support”. |
| 3. | Choose between whether the NAS will shut down or enter auto-protection mode after 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. |
| 4. | Click “Enable network UPS master”. This option appears only when your NAS is connected to the UPS by a USB cable. |
| 5. | Enter the “IP address” of other network UPS slaves to be notified in the event of power failure. |
| 6. | Click “Apply” to confirm and continue the setup for the NAS systems which operate in network slave mode below. |
Network slave mode
A network UPS slave communicates with network UPS master to receive the UPS status. To set up your NAS with UPS as network slave mode, follow the steps below:
| 1. | Make sure the NAS is connected to the same physical network as the network UPS master. |
| 2. | Select the option “Enable UPS Support”. |
| 3. | Choose between whether the NAS will shut down or enter auto-protection mode after 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. |
| 4. | Select “USB slave mode” from the “Protocol” drop down menu. |
| 5. | Enter the IP address of the network UPS master. |
| 6. | Click “Apply” to confirm. |
|
Note: To allow the UPS device to send SNMP alerts to the QNAP NAS in case of power loss, you may have to enter the IP address of the NAS in the configuration page of the UPS device. |
Behaviour of the UPS feature of the NAS:
In case of power loss and power recovery, the events will be logged in the “System Event Logs”.
During a power loss, the NAS will wait for the specified time you enter in the “UPS Settings” before powering off or entering auto-protection mode.
If the power restores before the end of the waiting time, the NAS will remain in operation and cancel its power-off or auto-protection action.
Once the power restores:
| • | If the NAS is in auto-protection mode, it will resume to normal operation. |
| • | If the NAS is powered off, it will remain off. |
Difference between auto-protection mode and power-off mode
|
Mode |
Advantage |
Disadvantage |
|
Auto-protection mode |
The NAS resumes after power recovery. |
If the power outage lasts until the UPS is turned off, the NAS may suffer from abnormal shutdown. |
|
Power-off mode |
The NAS will be shut down properly. |
The NAS will remain off after the power recovery. Manual power on of the NAS is required. |
If the power restores after the NAS has been shut down and before the UPS device is powered off, you may power on the NAS by Wake on LAN* (if your NAS and UPS device both support Wake on LAN and Wake on LAN is enabled on the NAS).
*This feature is not supported by TS-110, TS-119, TS-210, TS-219, TS-219P, TS-410, TS-419P, TS-410U, TS-419U, TS-112, TS-212, TS-412, TS-412U. Please visithttp://www.qnap.com for details.
If the power restores after both the NAS and the UPS have been shut down, the NAS will react according to the settings in “System Administration” > “Power Management”.
