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Link/activity LED
10
Management Port
Speed LED
11
Reset
* The dual active-active controller system enables a controller to take over the pool disk resources
and access the data upon the failure of the other controller. Takeovers can be initiated manually or be
set up with the automatic system failover protection (please refer to the software user manual).
**Storage Controller A (or B) has taken over the system. Storage Controller B (or A) has been
recovered and it is ready to resume data service. Giveback can be initiated manually or be set up with
automatic failback after system recovers (please refer to the software user manual).
Storage Controllers
With the dual-controller configuration, the controller on the left is Storage Controller A (SCA) and the
right is Storage B (SCB), as named in the QES, when viewed from the rear of the system. The dual-
controller configuration offers redundant access to disk storage. In the case of a controller or an I/O
path failure, the redundant controller will continue to provide access to disk drives.
Each storage controller features a BBU, one SAS host bus adapter (pre-installed in one of the PCIe slot),
one PCIe expansion slot, an onboard mini-SAS port, power-on button, two 10 Gigabit Ethernet ports,
one system management port, two USB 3.0 ports, one service port, and a reset button.
Redundant Power Supply
The power supply module is a 770 Watt switching power supply (Input: 100-127V~/10A, 50-60Hz; 200-
240V~/5A, 50-60Hz). The ES NAS has two identical power supply modules for power redundancy. If
either power supply fails, the other module will keep the system running until it can be replaced.
Note: Refer to Rear Panel LEDs and Buttons for power supply LED description.
PCIe expansion adaptors
The ES NAS adopts point-to-point, high-speed PCI Express (PCIe) Gen2 (x4) and Gen3 (x8) for I/O
expansions. The adapters can be either device adapters or host adapters. The system can support one
additional PCIe (Gen3 x8) attachment. The one with Gen2 (x4) is pre-installed with a SAS host bus
adapter.
Onboard mini-SAS ports
Two onboard mini Serial Attached SCSI (SAS) ports provide point-to-point 6Gb/s data (or 12Gb/s
depending on the model) transmission to other storage devices.
Off
Green = Network link
Flashing = Network activity
Green
Orange = 1 GbE connection
Orange
Green = 100Mbpsconnection
System reset button for rebooting the Storage Controller
without turning off the system power.
17
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