ZyXEL NAS540 User Guide - Page 298
Maintenance, Power
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Chapter 19 Maintenance Screens Click Maintenance > Power to display the following screen. Figure 164 Maintenance > Power The following table describes the labels in this screen. Table 101 Maintenance > Power LABEL DESCRIPTION Power Management Turn off hard disk(s) Enter the number of minutes to wait when the NAS is idle before spinning the hard disks down to sleep (hibernation). The default time is 15 minutes. Enable Sleeping HDD LED Blinking Select this to have the HDD LED blink slowly when the hard disk is sleeping (hibernating). Clear this to have the HDD LED stay on when the hard disk is sleeping. Minimum UPS Capacity Minimum UPS Capacity When you use an APC Uninterruptible Power Supply (UPS) with a USB connection to the NAS, the NAS shuts itself down if the APC UPS's battery charge gets down to the percentage you specify in this field. This allows the NAS to shut down properly and avoid data loss caused by a power failure when the UPS stops supplying power. Power On After Power Failure A setting around 50% is recommended. A setting close to 100% is not recommended since it would cause the NAS to shut down whenever the UPS is charging. A setting close to 0 is also not recommended since the UPS would not have enough power to allow the NAS to shutdown properly. Select an option to set whether or not the NAS restarts when the power is restored after a power failure. Keep Former Status Always Power On Note: Select this option to have the NAS automatically restart only if it was operating when the power failed. The NAS remains off if it was already off when the power failed. Select this option to keep the NAS operating as much of the time as possible. The NAS restarts automatically even if it was turned off when the power failed. 298 NAS540 User's Guide