User manual

2.4.2 System buzzer
The system buzzer features ar e describe in the following:
1. The system buzzer alarms for 1 second when system boots up
successfully.
2. The system buzzer alarms continuously when an error event happens.
To stop the alarm, use the alarm mute option .
3. The alarm will be muted automatically wh en the error situation is
resolved. E.g., when a RAID 5 array is degraded and the alarm rings.
After a user changes/adds one physical disk for rebuilding, and when
the rebuilding is done, the alarm will be muted automatically.
2.4.3 LED
The LED features are de scribe as foll ows:
1. POWER LED: Hardware activated LED when system is powered on.
2. BUSY LED: Hardware activated LED when the front -end channel is
busy.
3. System STATUS LED : Indicates system status. When an error occurs
or the RAID is degraded, the LED lights u p.
Caution
Before powering off, it is recommended to execute
“Shutdown” to flush the data from cache to physical disks.