About This Guide.......................................................................................................................................... 3
About the ES1686dc.....................................................................................................................................4
Front Panel...............................................................................................................................................8
Front Panel Buttons..................................................................................................................................8
Front Panel LEDs..................................................................................................................................... 9
Front Panel OLED Display..................................................................................................................... 10
System Board.........................................................................................................................................18
Setting Up the NAS.....................................................................................................................................20
CE Notice....................................................................................................................................................59
This guide provides information on the QNAP ES1686dc NAS and step-by-step instructions on installing the
hardware. It also provides instructions on basic operations and troubleshooting information.
Audience
This document is intended for storage administrators. This guide assumes that the user is knowledgeable
and qualified to install, maintain, and troubleshoot issues involving servers, server components, and storage
systems. This guide also assumes that the user is trained to recognize hazards, including the appropriate
actions the user needs to take to prevent personal injury and damage to data and property.
Document Conventions
SymbolDescription
Notes provide default configuration settings and other supplementary
information.
Important notes provide information on required configuration settings and other
critical information.
Tips provide recommendations or alternative methods of performing tasks or
configuring settings.
Warnings provide information that, when ignored, may result in potential loss,
injury, or even death.
Preface 3
ES1686dc User Guide
2. Product Overview
This chapter provides basic information about the QNAP ES1686dc NAS.
About the ES1686dc
The ES1686dc is designed to deliver a scalable platform for enterprise-level solutions. It is equipped with a
powerful multi-core processor, AES-NI hardware encryption engine, and both USB 3.0 and 10GbE ports,
allowing it to deliver optimal performance for enterprise users. The ES1686dc supports up to 16 storage
drives. This number can be increased by attaching multiple expansion units. It has M.2 drive support and
redundant storage controllers and power supplies to provide the necessary reliability, serviceability, and read/
write speeds.
Hardware Specifications
Warning
If your QNAP product has hardware defects, return the product to QNAP or a QNAPauthorized service center for maintenance or replacement. Any attempt to repair or
perform maintenance procedures on the product by you or an unauthorized third-party
invalidates the warranty.
QNAP is not responsible for any damage or data loss caused by unauthorized
modifications and installation of unsupported third-party applications.
For details, see the QNAP Warranty Terms and Conditions.
Ordering P/NCPUMemoryPower supply
ES1686dc-2123IT-64G
ES1686dc-2145NT-96G
ES1686dc-2145NT-128G
ComponentES1686dc-2123IT-64G
Processor
CPU
Frequency4-core/8-thread 2.2 GHz base/3.0
Architecturex86 64-bit
Encryption engineAES-256
Memory
Intel® Xeon™ D-2123IT
Intel® Xeon™ D-2145NT
Intel® Xeon™ D-2145NT
Intel® Xeon™ D-2123ITIntel® Xeon™ D-2145NT
GHz turbo
64 GB (32 GB per
controller)
96 GB (48 GB per
controller)
128 GB (64 GB
per controller)
Redundant
Redundant
Redundant
ES1686dc-2145NT-96G
ES1686dc-2145NT-128G
8-core/16-thread 1.9 GHz base/3.0
GHz turbo
Product Overview 4
ES1686dc User Guide
ComponentES1686dc-2123IT-64G
ES1686dc-2145NT-96G
ES1686dc-2145NT-128G
Memory slots8 x DDR4 RDIMM or LRDIMM slots per controller
Important
Use only QNAP memory modules to maintain system
performance and stability. For NAS devices with more
than one memory slot, use QNAP modules with
identical specifications.
Using unsupported modules may degrade
performance, cause errors, or prevent the operating
system from starting.
You can only use one type of dual in-line memory
module (DIMM) at a time. Do not use registered DIMM
(RDIMM) with load-reduction DIMM (LRDIMM)
memory.
Maximum memory512 GB RAM: 8 x 64 GB
Flash memory4 GB (dual boot OS protection)
Cache for Copy-to-Flash64 GB per controller
Storage
Drive bays16 x 3.5-inch SAS 12 Gbps
Note
The interface is backward compatible to SAS 6 Gbps.
Drive compatibility• 3.5-inch SATA hard disk drives
• 3.5-inch SAS hard disk drives
• 2.5-inch SATA hard disk drives
• 2.5-inch SATA solid-state drives
• 2.5-inch SAS hard disk drives
• 2.5-inch SAS solid-state drives
Tip
For the list of compatible drive models, go to https://
www.qnap.com/compatibility.
M.2 SSD slots2 x M.2 SSD slots per controller
Note
These slots support SATA 6 Gbps and PCIe Gen 3 x4
NVMe SSDs.
M.2 SSD form factor2280
SSD cache acceleration support• 3.5-inch drive bays 1 to 16
• M.2 SSD slots 1 to 2
• Optional: M.2 SSD slots on an M.2 SSD expansion card
Network
10 Gigabit Ethernet ports4 x 10GbE SFP+ ports per controller
Product Overview 5
ES1686dc User Guide
ComponentES1686dc-2123IT-64G
Gigabit Ethernet ports3 x GbE RJ45 ports per controller
External I/O Ports & Expansion Slots
PCIe slots2 x PCIe 3.0 x8 slots per controller
Tip
For the list of compatible expansion cards, go to
https://www.qnap.com/compatibility.
USB ports2 x USB 3.0 Type-A ports per controller
Interface
ButtonsNAS
• Power
Storage Controllers
• Power
• Reset
Dimensions
Form factor3U Rackmount
Dimensions (H x W x D)132 x 483.05 x 630.62 mm
(5.20 x 19.02 x 24.83 in)
Net weight25.83 kg (56.95 lbs)
Others
Rail compatibilityRAIL-E02
ES1686dc-2145NT-96G
ES1686dc-2145NT-128G
Note
Information on rail kit installation can be found in the
installation guide included in the rail kit package.
Power supply unit2 x 770W, 90-264V AC, 50/60 Hz
System batteryCR2032 lithium battery (3V, 225 mAh)
Warning
To avoid potential battery explosion, causing injury or
damage to components, ensure that you replace the
existing battery with a battery of the same type.
Important
Dispose of used batteries according to local
regulations or the instructions of the battery
manufacturer.
Hot-swappable battery backup unit 2 x 10.8V, 2200 mAh
Sound level55.8 db(A)
Note
The sound level was tested at a bystander position,
which is within one meter of the NAS. The test NAS
operated at low speed with the maximum number of
drives installed.
Product Overview 6
ES1686dc User Guide
ComponentES1686dc-2123IT-64G
Hot-swappable fan moduleSystem: 60 x 60 x 38 mm, 12V DC
Warning
To avoid potential injury or damage to components, do
not touch the fans while the NAS is connected to a
power source.
To ensure proper cooling, replacement of the fan
should be completed within 10 seconds.
Operating temperature0˚C to 40˚C (32˚F to 104˚F)
Relative humidity• Non-condensing relative humidity: 5% to 95%
• Wet-bulb temperature: 27˚C (80.6˚F)
Tip
Model specifications are subject to change without prior notice. To see the latest
specifications, go to https://www.qnap.com.
ES1686dc-2145NT-96G
ES1686dc-2145NT-128G
Package Contents
ItemQuantity
ES1686dc NAS1
Power cord2
Ethernet cable6
Screws for 2.5-inch drives64
Screws for 3.5-inch drives64
Screws for M.2 SSDs4
RAIL-E02 rail kit1
Quick Installation Guide (QIG)1
Components
Product Overview 7
Front Panel
ES1686dc User Guide
No.ComponentNo.Component
1OLED display4Drive status LED
2System power LED5Drive activity LED
3Status LED--
Front Panel Buttons
Note
Pull the panel cover to access the front panel buttons.
Product Overview 8
ES1686dc User Guide
No.ComponentNo.Component
1OLED button2Power button
OperationUser ActionResult
Power on NASPress the power button.• Both storage controllers power on.
• All storage and management services are
disabled.
Tip
• System startup takes 10 to 15
minutes, depending on the number
of installed drives and connected
devices. Check the rear panel LEDs
to determine the startup status. For
details, see Rear Panel LEDs.
• This button can only be used to
power on the two storage
controllers. Use the respective rear
panel storage controller power
button to power off the storage
controllers. For details, see Storage
Controller Power Button.
Power on OLED
Press the OLED button.The OLED display powers on.
display
Power off OLED
Press the OLED button.The OLED display powers off.
display
Front Panel LEDs
The front panel LEDs indicate system status and related information when the NAS is powered on. The
following LED information applies only when the drive is correctly installed and when the NAS is connected
to the network.
For details on the location of the LEDs, see Front Panel.
LEDStatusDescription
System powerBlueSystem powered on
Product Overview 9
LEDStatusDescription
System statusGreenSystem operating normally
Red• System errors or warnings (e.g. degraded RAID mode,
memory failure, fan/power supply failure, system/disk
temperature too high, storage pool reaching threshold
value) were detected. Refer to the QES User Guide for
details.
• The system is performing takeover. The dual activeactive 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. For more
information, refer to the QES user guide.
• Power supply unit unplugged
Drive statusGreenDrive can be accessed
Flashing green slowlyThe QES Storage Manager Locate command is enabled
and is identifying the drive
RedDrive read/write error
OffDrive not installed
Drive activityFlashing green continuously
No drive activity
or slowly
Flashing greenHigh activity on drive or drive being configured as part of
an array
ES1686dc User Guide
Front Panel OLED Display
The OLED display displays the status of the storage controllers and main components.
For details on the location of the OLED display, see Front Panel.
Icon nameIconDescription
Controller power
status
• On: Both controllers are powered on
• Flashing: Both controllers are booting
• On: Only controller A is powered on
• Flashing: Controller A is booting
• On: Only controller B is powered on
• Flashing: Controller B is booting
Product Overview 10
ES1686dc User Guide
Icon nameIconDescription
Controller fan status• On: The fan modules of both controllers are operating
normally
• Flashing: The fan modules of both controllers are
operating incorrectly or are not installed
If both controllers are installed:
• Flashing: The fan module in controller A is operating
incorrectly or is not installed
If only controller A is installed:
• On: The fan module in controller A is operating normally
• Flashing: The fan module in controller A is operating
incorrectly or is not installed
If both controllers are installed:
• Flashing: The fan module in controller B is operating
incorrectly or is not installed
If only controller B is installed:
• On: The fan module in controller B is operating normally
• Flashing: The fan module in controller B is operating
incorrectly or is not installed
Product Overview 11
Icon nameIconDescription
Controller battery
backup unit
• On: The BBUs of both controllers are operating
normally
• Flashing: The BBUs of both controllers are operating
incorrectly
• Highlighted: The BBUs of both controllers are charging
• Off: The BBUs of both controllers are not detected
If both controllers are powered on:
• Flashing: The BBU in controller A is operating
incorrectly or is not detected
• Highlighted: The BBU in controller A is charging
If only controller A is powered on:
• On: The BBU in controller A is operating normally
ES1686dc User Guide
• Flashing: The BBU in controller A is operating
incorrectly or is not detected
• Highlighted: The BBU in controller A is charging
If both controllers are powered on:
• Flashing: The BBU in controller B is operating
incorrectly or is not detected
• Highlighted: The BBU in controller B is charging
If only controller B powered on:
• On: The BBU in controller B is operating normally
• Flashing: The BBU in controller B is operating
incorrectly or is not detected
• Highlighted: The BBU in controller B is charging
High availability status• On: In active state
• Flashing: Performing takeover or undergoing giveback
Highlighted: Controller A is in takeover state
Highlighted: Controller B is in takeover state
Product Overview 12
ES1686dc User Guide
Icon nameIconDescription
Two-digit displayThe two-digit display shows the booting status of each
storage controller. The left digit is controller A, and right is
controller B.
• No Display: BIOS booting
• 1: Detecting device
• 2: Applying network settings
• 3: Applying system settings
• 4: Service starting
• 5: System self-testing
• 8: System initializing
• 0: System ready
Rear Panel
Tip
To view the full list of system components and their status, open High Availability in QES.
Product Overview 13
ES1686dc User Guide
No.ComponentNo.Component
1Power supply unit9Battery backup unit
2Ethernet port 6 (10GbE SFP+)10Power button
3Ethernet port 4 (10GbE SFP+)11Service port
4Ethernet port 2 (GbE RJ45)12Ethernet port 5 (10GbE SFP+)
5Ethernet port 1 (GbE RJ45, management
13Ethernet port 7 (10GbE SFP+)
port)
6Reset button14PCIe 3.0 x8 slot 1
7USB 3.0 Type-A ports15PCIe 3.0 x8 slot 2
8Ethernet port 3 (GbE RJ45)--
Product Overview 14
Rear Panel LEDs
ES1686dc User Guide
No.ComponentNo.Component
1Power supply LED6Battery backup unit status LED
2Battery backup unit LED7Fan status LED
3Gigabit Ethernet LED (port speed)8Status LED
4Gigabit Ethernet LED (port activity)910 Gigabit Ethernet LED (port activity)
5High availability LED1010 Gigabit Ethernet LED (port speed)
The following LED information applies only when the drive is correctly installed and when the NAS is
connected to the network.
LEDStatusDescription
Power supply
Green• Powered on
unit
• Power supply functioning normally
Flashing greenSystem powering off
OrangeAC power cord unplugged or malfunctioning
OffOne or more of the following conditions exist:
• AC power unavailable
• Power supply failed
Battery backup
unit
GreenFunctioning normally
RedMalfunctioning
OrangeCharging or learning
OffNot correctly attached to the ES1686dc
StatusGreenSystem operating normally
Flashing greenSystem booting
OffSystem powered off
Product Overview 15
LEDStatusDescription
FanGreenFunctioning normally
OrangeMalfunctioning
OffFans not detected
Battery backup
unit status
GreenFunctioning normally
OrangeWriting buffer for Copy-to-Flash
For details, see Battery Backup Unit.
OffOne or more of the following conditions exist:
• Storage controller is powered off
• System cannot detect battery backup unit
High availabilityGreenActive State
Flashing orangeOne of the following:
• Performing takeover: 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.
For more details, refer to the QES user guide.
ES1686dc User Guide
10 Gigabit
Ethernet port
speed
10 Gigabit
Ethernet port
activity
1 Gigabit
Ethernet port
activity
1 Gigabit
Ethernet port
speed
• Undergoing giveback: One of the storage controllers
has taken over the system. The other storage
controller has resumed operations and is ready to
resume data service. Giveback can be initiated
manually or be set up with automatic failback after
system recovers. For more details, refer to the QES
user guide.
OrangeStorage controller has taken over from the other storage
controller
OffOne or more of the following conditions exist:
• Storage controller failed
• Storage controller is powered off
Green10GbE connection
Orange1GbE connection
Off100 Mbps connection
GreenNetwork link active
Flashing greenNetwork link active
OffNo network link
GreenNetwork link established
Flashing greenNetwork link active
OffNo network link
Green1GbE connection
Orange100 Mbps connection
Product Overview 16
ES1686dc User Guide
Storage Controller Power Button
OperationUser ActionResult
Power onPress the button once.The storage controller powers on.
Power offPress and hold the button for 5 seconds.The storage controller powers off.
Force power offPress and hold the button for 10 seconds.The storage controller shuts down.
Warning
Use this method only when the
storage controller is
unresponsive. This action may
result in data loss.
Reset Button
OperationUser ActionResult
Basic system resetPress and hold the
button for 3 seconds.
The following settings are set to default values.
• System administrator password: admin
Advanced system
reset
Press and hold the
button for 10 seconds.
• TCP/IP configuration:
• IP address settings: Automatically obtained via
DHCP
• Jumbo frames: Disabled
• Port trunking mode: Failover (multi-LAN models
only)
• Security level: Low (Allow all connections)
• LCD panel password: (blank)
• VLAN: Disabled
• Service binding: NAS services can run on any
available network interface
The device performs a basic system reset. All default
system settings are also restored, deleting all previously
created users, user groups, and shared folders. The user
data stored on the disks is retained.
To retrieve data after an advanced system reset, recreate
the previous folder structure on the NAS.
Battery Backup Unit
The battery backup unit (BBU) protects the data integrity of each storage controller. If both power supply
units fail during a power outage, the system uses the BBUs for power and activates the asynchronous
DRAM refresh (ADR) feature of the processors. While the BBUs supply power, cached data stored in the
DRAM are written to the M.2 SSDs. This process is called Copy-to-Flash. Once power is restored and the
system restarts, any logs, archives, or other important data are reconstructed from the data stored on the M.
2 SSDs.
Product Overview 17
Warning
During a power outage, do not remove storage controllers while their BBU status LEDs are
orange. Removing a storage controller during this period interrupts the Copy-to-Flash
process and may result in data loss.
System Board
ES1686dc User Guide
No.ComponentNo.Component
1Memory slot 17Memory slot 7
2Memory slot 28Memory slot 8
3Memory slot 39PCIe 3.0 slot 1 (x8)
4Memory slot 410PCIe 3.0 slot 2 (x8)
5Memory slot 511M.2 SSD slot 2
6Memory slot 612M.2 SSD slot 1
Drive Numbering
Product Overview 18
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