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SAS Host Bus Adapter (HBA)
In addition to the above external Serial Attached SCSI (SAS) host attachment port built into the Storage
Controller, a pre-installed SAS HBA provides two additional mini-SAS ports for direct attachment to the
expansion units. The SAS HBA supports either 12Gb/s or 6Gb/s transmission speed depending on the
models. (ES1642dc comes with 12Gb/s SAS HBA whereas ES1640dc comes with 6Gb/s SAS HBA.)
Battery Backup Units (BBU)
The battery is 10.8V 2200mAH.
The cache of QES NAS Storage is protected by a battery against power loss. The BBU provides power to
Battery-Backed Write Cache. The battery provides power if the data in the cache needs to be written to
the mSATA memory card if power is disrupted. In the instance when only one BBU fails, the working BBU
will protect the operation of write cache on both Storage Controllers. If both BBU fail at the same time,
the system will switch to write-through cache mode. You can schedule the BBU learning cycle in the QES;
for more information, please refer to the software user manual.
10GbE networking
4 x SFP+ (Intel® XL710-AM1) for Model ES1642dc or 2 x RJ45 (Intel® X540-BT2) for Model ES1640dc
Architected and validated with Intel® Xeon® processor E5 v2 platform to deliver a balanced platform as
this ES NAS series, the Ethernet ports base on the Intel XL710 or X540 Ethernet controller implements
hardware optimizations and off-loads for exceptional performance in usage models such as TCP
Stateless Off-loads. The network configuration of the QES supports Jumbo frame, port trunking
and VLAN settings for you to optimize performance and security in an IP SAN environment. 40GbE
networking can be easily achieved with the installation of network cards via the PCIe expansion (PCIe
Gen3 x8).
Storage Features
Disk drives and Disk Enclosures
The QES NAS storage system supports two redundant Storage Controllers with the latest SAS 12Gb/s or
6Gb/s HDD interface (ES1642dc comes with 12Gb/s SAS HDD interface whereas ES1640dc comes with
6Gb/s HDD interface) in 16 drive configuration, which can be expanded to a maximum of 128 drives with
the expansion units. The system supports all-SSD drive set as well as SAS – SATA intermix within an
enclosure. The drives are numbered 1 - 16 sequentially starting from the bottom left to the top right.
When creating a logical unit number (LUN) or a storage pool, a designated Storage Controller (SCA or
SCB) must be assigned ownership of the LUN or pool. LUNs can be distributed between the
two controllers to achieve optimized performance of the whole system. In addition to load balancing,
the dual active/active controller architecture provides system failover protection that enables the
transfer of storage resources from one controller to the other in case of failure events such as JBOD or
data service network connection failures.
Solid-state drives (SSDs)
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