Samsung ES1642dc Hardware User Manual page 14

Qnap enterprise-class
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5
HDD Status LEDs
(upper)
5
HDD Activity LEDs
(lower)
* The dual active-active controller system enables a single controller to take over the pool disk resources
owned by the other controller in the event of a controller failure. Takeovers can be initiated manually or
be set up with the automatic system failover protection (please refer to the software user manual).
booting process. The left and right digits represent the left
Storage Controller (SCA) and the right Storage Controller
(SCB) respectively.
No-Display: BIOS booting
1: Device detecting
2: Network settings
3: System settings
4: Services start
5: System self-testing
0: System ready
Green
Green On = Drive is actively online
Red
Slow flashing = The "Locate" command which helps
identify the drive is executed in the Storage Manager on
the QES
Red = Error/Damage
Off = No HDD present
Green
On/Slow flashing = No Drive activity
Flashing = High activity on the drive or drive is
being configured as part of an array
Caution: Do not replace a drive without bring it offline first
in the QES. You may replace a drive online only when it is
part of an array that has been configured for fault
tolerance and a predictive failure alert is received from the
QES. For more information, refer to the software user
manual.
14

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