Synology DX1222 Manual

Expansion Unit DX1222
Hardware Installation Guide

Table of Contents
Chapter 1: Before You Start
Package Contents 3
Synology DX1222 at a Glance 4
Other LED Indicators 5
Hardware Specication 6
Spare Parts 7
Safety Instructions 8
Chapter 2: Hardware Setup
Tools and Parts for Component Installation 9
Install Drives 9
Connect with Synology NAS 12
Chapter 3: System Maintenance
Replace System Fan 13
Conrm Connection and Manage Storage Spaces 15
2
Synology_HIG_DX1222_20210331

3
Thank you for purchasing this Synology product! Before setting up your new Synology NAS, please check the
package contents to verify that you have received the items below. Also, make sure to read the safety instructions
carefully to avoid harming yourself or damaging your Synology NAS.
Note: All images below are for illustrative purposes only, and may di󰀨er from the actual product.
Package Contents
Main unit x 1 AC power cord x 1
Mini-SAS HD expansion cable x 1
Hard drive tray key x 2
Screws for 2.5" drives x 52
Before You Start 1
Chapter

4Chapter 1: Before You Start
Synology DX1222 at a Glance
No. Article Name Location Description
1 STATUS Indicator
Front
Displays the status of the system. For more information, see
"LED Indicator Table".
2 ALERT Indicator Displays warnings regarding fan or temperature. For more
information, see "LED Indicator Table".
3 POWER Button
1. Press to power on your Synology NAS.
2. To power o󰀨 your Synology NAS, press and hold until you
hear a beep sound and the Power LED starts blinking.
4 LINK Indicator Displays the status of the Synology NAS connection. For
more information, see "LED Indicator Table".
5 DRIVE Status Indicator Displays the status of each drive. For more information, see
"LED Indicator Table".
6 Drive Tray Install drives (hard disk drives or solid state drives) here.
7 Drive Tray Lock Lock or unlock drive trays.
8 Power Port
Rear
Connect power cord here.
9 Fan Disposes of excess heat and cools the system. If the fan
malfunctions, the Synology NAS will emit a beeping sound.
10 Expansion Port Connect Synology NAS here.
6
7
1
2 3
4
5
8
9
10
5
7

5Chapter 1: Before You Start
LED Indicator Table
LED Indicator Color Status Description
POWER
Blue Static Powered on
O󰀨 Powered o󰀨
Status
Green Static Volume normal
O󰀨 No volume/HDD Hibernation
DRIVE status Indicator
(on tray)
Green
Static Drive ready and idle
Blinking Accessing drive
Orange Static Drive error/Port disabled1
O󰀨 No internal Drive
ALERT
Red Blinking System error2
O󰀨 System normal
LINK
Green Static Synology NAS connected
O󰀨 Synology NAS disconnected
Note:
1 Please try to restart your Synology NAS or re-insert the drives, then run the HDD/SSD manufacturer's
diagnostic tool to check the health status of the drives. If you can sign in to DSM, please run the built-in
S.M.A.R.T. test to scan the drives. If the problem remains unresolved, please contact Synology Technical
Support for help.
2 If the ALERT LED continuously blinks red, this indicates there are system errors such as fan failure, system
overheating, or volume degrade. Please sign in to DSM for detailed information.

6Chapter 1: Before You Start
Hardware Specication
Item DX1222
Compatible Drive Type 3.5"/2.5" SATA x 12
Size (H x W x D) (mm) 270 x 300 x 340
Weight (kg) 9.02
Agency Certication • FCC Class B • CE Class B • UKCA • BSMI Class B
• EAC • VCCI • RCM • KC • UL • RoHS Compliant
HDD Hibernation Yes
Environment Requirement
• Line voltage: 100 V to 240 V AC
• Frequency: 50/60 Hz
• Operating Temperature: 32 to 104˚F (0 to 40˚C)
• Storage Temperature: -5 to 140˚F (-20 to 60˚C)
• Relative Humidity: 5% to 95% RH
Note: Model specications are subject to change without notice. Please refer to www.synology.com for the latest information.

7Chapter 1: Before You Start
Spare Parts
Visit www.synology.com/products/spare_parts if you need to replace system fans, disk trays, or power supply
units.
Model Name Picture Description
Disk Tray (Type D6) 3.5"/2.5" Drive Tray With Lock
FAN 120*25_6 System Fan 120*120*25 mm x 2
PSU 550W_1 SFX PSU 550W
Cable MiniSASHD_
EXT_1 External MiniSAS HD Cable

8Chapter 1: Before You Start
Safety Instructions
Keep away from direct sunlight and away from chemicals. Ensure a stable environment
with no abrupt changes in temperature or humidity.
Place the unit right side up at all times.
Keep the unit away from liquids.
Before cleaning, unplug the power cord. Do not use chemical or aerosol cleaners. Wipe
with damp paper towels.
To prevent the unit from falling over, do not place it on carts or any unstable surfaces.
The power cord must plug into the correct supply voltage. Ensure the supplied AC voltage
is correct and stable.
Warning, electric shock hazard. To remove all electrical current from the device, ensure
that all power cords are disconnected from the power source.
Risk of explosion if the battery is replaced by an incorrect type. Dispose of used batteries
appropriately.
Power cord must be plugged into a socket-outlet with earthing connection.
Keep body parts away from moving fan.
This product must be installed by qualied personnel in a restricted access location (like
dedicated equipment rooms, service closets).

9
Tools and Parts for Component Installation
Please prepare the following tools and parts before setting up your expansion unit:
• A screwdriver (only for 2.5" drives)
• At least one 3.5" or 2.5" SATA drive (please visit www.synology.com/compatibility for compatible drive
models)
Warning: If you install a drive that contains data, the system will format the drive and erase all existing data.
Please back up any important data before installation.
Install Drives
1 Press the right part of the hard drive tray to unlock the handle.
DX1222
2 Pull out the hard drive tray handle as shown below to remove the hard drive tray.
DX1222
Hardware Setup 2
Chapter

10 Chapter 2: Hardware Setup
3 Load drives in the drive trays.
• For 3.5" drives: Remove the fastening panels from the sides of the drive tray. Place the drive in the drive
tray. Then insert the fastening panels to secure the drive in place.
• For 2.5" drives: Remove the fastening panels from the sides of the drive tray and store them in a safe
place. Place the drive in the area of the drive tray indicated by a blue rectangle below. Turn the tray upside
down and tighten the screws to secure the drive in place.
4 Insert the loaded hard drive tray into the empty hard drive bay and push it into position by the upper half of the
handle.
DX1222
Note: Make sure that the drive tray is completely inserted. Otherwise, the drive might not function properly.

11 Chapter 2: Hardware Setup
5 Press the handle back into the front panel until you hear a click to secure the hard drive tray in place.
6 Insert the hard drive tray key into the hard drive tray lock, turn the key clockwise (to the "I" position) to lock the
hard drive tray handle, and then remove the key.
DX1222
7 Repeat the steps above to install the other drives you have prepared.
8 Drives are numbered as shown below.
12
34
6
5
78
910
11 12
Note: If you plan to create a RAID volume, we recommend installing drives of identical size to make the best
use of drive capacity.

12 Chapter 2: Hardware Setup
Connect with Synology NAS
1 Connect one end of the power cord to the power port of the expansion unit, and the other to the power outlet.
2Connect the expansion cable to the expansion ports of DX1222 and Synology NAS.
After the connection is complete, DX1222 will be turned on or o󰀨 automatically when the connected NAS powers
on or o󰀨.
Important: Do not remove the expansion cable while the host device is still powered on. Doing so may result
in data loss.

13
3
Chapter
System Maintenance
Replace System Fan
If the cooling fan located on the back of the Synology NAS malfunctions, please follow the steps below to remove
the malfunctioning fan and replace it with a new one.
1 Power o󰀨 your Synology NAS and remove the power cord.
2 Fans are numbered as shown below:
1 2
3 Pull the 6 push pins that secure the fan module.
4 Pull out the malfunctioning fan module to remove it from your Synology NAS.

14 Chapter 3: System Maintenance
5 Install a new fan module:
a Install the new module with the power connector at the bottom, so that it can be properly put onto the
chassis.
b Make sure that all 6 push pins on the new module are pulled outwards before the module is placed into your
Synology NAS, and then press the push pins back into place to secure the fan module.

15 Chapter 3: System Maintenance
Conrm Connection and Manage Storage Spaces
1 Log in to the DiskStation Manager (DSM) of the main NAS unit.
2 Go to Control Panel > External Devices > External Devices to conrm the expansion unit is successfully
connected.
3 Go to Storage Manager to manage storage space creation or expansion.
• If you want to create a new volume on the expansion, click Create and follow the instructions of the
wizard.

16 Chapter 3: System Maintenance
• If you want to expand an existing volume with expansion unit, select the volume you want to expand
from the volume list, click Action > Congure, and follow the instructions of the wizard.
For detailed information about volume management, go to Storage Manager and see DSM Help.
Limitations: Before using this expansion unit, please see the limitations below.
• This expansion unit can be linked to only one Synology NAS at a time.
• The data of some DSM packages can be stored on the expansion unit only if you create an expanded volume with it.
The data cannot be stored on the expansion unit if an independent volume has been created on it.
• Drives previously used in a Synology NAS are not readable when directly inserting them into this expansion unit, and
vise versa.

SYNOLOGY, INC.
END USER LICENSE AGREEMENT
IMPORTANT–READ CAREFULLY: THIS END USER LICENSE AGREEMENT ("EULA") IS A LEGAL AGREEMENT
BETWEEN YOU (EITHER AN INDIVIDUAL OR A LEGAL ENTITY) AND SYNOLOGY, INC. ("SYNOLOGY") FOR THE
SYNOLOGY SOFTWARE INSTALLED ONTO THE SYNOLOGY PRODUCT PURCHASED BY YOU (THE "PRODUCT"),
OR LEGALLY DOWNLOADED FROM WWW.SYNOLOGY.COM, OR ANY OTHER CHANNEL PROVIDED BY
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YOU AGREE TO BE BOUND BY THE TERMS OF THIS EULA BY USING THE PRODUCTS CONTAINING THE
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IF YOU DO NOT AGREE TO THE TERMS OF THIS EULA, DO NOT USETHE PRODUCTS CONTAINING THE
SOFTWAREOR DOWNLOAD THE SOFTWARE FROM WWW.SYNOLOGY.COM, OR ANY OTHER CHANNEL
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PURCHASED IT FOR A REFUND IN ACCORDANCE WITH THE RESELLER'S APPLICABLE RETURN POLICY.
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your device connected to the Product solely relating to your authorized use of the Product.
Section 2. Documentation. You may make and use a reasonable number of copies of any documentation provided with the
Software; provided that such copies will only be used for internal business purposes and are not to be republished or
redistributed (either in hard copy or electronic form) to any third party.
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Section 5. License Limitations. The license set forth in Sections 1, 2 and 3 applies only to the extent that you have ordered
and paid for the Product and states the entirety of your rights with respect to the Software. Synology reserves all rights not
expressly granted to you in this EULA. Without limiting the foregoing, you shall not authorize or permit any third party to: (a)
use the Software for any purpose other than that in connection with the Product; (b) license, distribute, lease, rent, lend,
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Section 10. Support. During the period specified in the Section 9, Synology will make available to you the support services.
Following the expiration of the applicable period, support for Software may be available from Synology upon written

request.
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Software and all of its component parts.
Section 16. Assignment. You may not transfer or assign your rights under this EULA to any third party, except for that pre-
installed in the Products. Any such transfer or assignment in violation of the foregoing restriction will be void.
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Section 18. Dispute Resolution. Any dispute, controversy or claim arising out of or relating to this EULA will be resolved
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LIMITED PRODUCT WARRANTY
THIS LIMITED WARRANTY ("WARRANTY") APPLIES TO THE PRODUCTS (AS DEFINED BELOW) OF SYNOLOGY,
INC. AND ITS AFFILIATES, INCLUDING SYNOLOGY AMERICA CORP, (COLLECTIVELY, "SYNOLOGY"). YOU
ACCEPT AND AGREE TO BE BOUND BY THE TERMS OF THIS WARRANTY BY OPENING THE PACKAGE
CONTAINING AND/OR USING THE PRODUCT. PLEASE BE ADVISED THAT THIS LIMITED WARRANTY DOES NOT
APPLY TO THE SOFTWARE CONTAINED IN THE PRODUCTS WHICH SHALL BE SUBJECT TO ITS END USER
LICENSE AGREEMENT, AND THAT SYNOLOGY RESERVES THE RIGHT TO MAKE ADJUSTMENTS AND/OR
MODIFICATION TO THIS PRODUCT WARRANTY FROM TIME TO TIME WITHOUT PROVIDING PRIOR NOTICE TO
YOU. IF YOU DO NOT AGREE TO THE TERMS OF THIS WARRANTY, DO NOT USE THE PRODUCT. INSTEAD, YOU
MAY RETURN THE PRODUCT TO THE RESELLER WHERE YOU PURCHASED IT FOR A REFUND IN ACCORDANCE
WITH THE RESELLER'S APPLICABLE RETURN POLICY.
PLEASE NOTE THAT SYNOLOGY’S WARRANTY SUPPORTS ARE NOT AVAILABLE IN EVERY COUNTRY, AND THAT
SYNOLOGY MAY REFUSE TO PROVIDE THIS LIMITED WARRANTY SUPPORTS TO YOU IF YOU REQUEST SUCH
SUPPORTS NOT AT THE COUNTRY AT WHICH THE PRODUCT WAS ORIGINALLY PURCHASED. THE COUNTRY AT
WHICH THE PRODUCT WAS ORIGINALLY PURCHASED SHALL BE DETERMINED BASED ON THE SYNOLOGY’S
INTERNAL RECORDS.
Section 1. Products
(a) "Products" refer to New Products or Refurbished Products.
(b) "New Product" means the Synology-branded hardware product and Synology-branded accessories contained in the
original packaging Customer bought from an authorized Synology distributor or reseller. You may see our “New Product” at
Product Support Status.
(c) "Refurbished Product" means all Synology products which have been refurbished by Synology’s affiliate or an
authorized Synology distributor or reseller, not including those sold as "as is" or with "no warranty" by anyone.
(d) Other definition: "Customer" means the original person or entity purchasing the Product from Synology or an authorized
Synology distributor or reseller; "Online Store" means an online shop operated by Synology or Synology’s affiliate;
"Software" means the Synology proprietary software that accompanies the Product when purchased by Customer, is
downloaded by Customer from the Web Site, or is pre-installed on the Product by Synology, and includes any firmware,
associated media, images, animations, video, audio, text and applets incorporated into the software or Product and any
updates or upgrades to such software.
Section 2. Warranty Period
(a) "Warranty Period": The warranty period commences on the purchase date is shown on the purchase receipt or invoice
to be presented by Customer and ending at the day after the end of the Warranty Period for each New Product. You may
see the Warranty Period for each New Product at Product Support Status. For the Refurbished Product or repaired parts,
it's the remainder of the warranty period of the product they are replacing, or ninety (90) days from the date the product was
replaced or repaired, whichever is longer; except for those sold as "as is" or with "no warranty" by any stores. Without
presenting such purchase receipt or invoice, the warranty period shall commence on the date of manufacture based on our
internal record.
(b) "Extended Warranty Period": For Customer purchasing EW201/ EW202 optional service for applicable Products
specified in Section 1 (b), the Warranty Period specified in Section 2 (a) of the applicable Product registered with
EW201/EW202 optional service will be extended by two years. You may see the applied model at Extended Warranty.
(c) "Immediate termination of Warranty Period": As to the Synology drive product, its warrant period will terminate
immediately upon either of following situations occurs: (a) for solid-state drive, its lifespan wear-out indicator is equal to or
exceeds the limit specified in the "product specifications" of the drive attached with the purchased product; (b) for all drive
products, its temperature record is equal to or exceeds the operating temperature limit of the drive, which is specified in the
"product specifications" attached with the purchased product.
Section 3. Limited Warranty and Remedies
3.1 Limited Warranty. Subject to Section 3.2, Synology warrants to the Customer that each Product (a) will be free of
material defects in workmanship and (b) under normal use will perform substantially in accordance with Synology's
published specifications for the Product during the Warranty Period. Such limited warranty does not apply to the Software
contained in the product or purchased by Customer which shall be subject to the accompanying end user license
agreement provided with the Product. Synology provides no warranty to Refurbished Product sold as "as is" or with "no
warranty". (c) This Limited Warranty is NOT transferable and applies only to the customers who directly purchase products
from Synology’s affiliate, the resellers, and distributor that Synology authorized. The warranty set forth in Section 3 will
terminate upon Customer's sale or transfer of the Product to a third party.
3.2 Exclusions. The foregoing warranties and warranty obligations do not apply to any Product that (a) has been installed
or used in a manner not specified or described in the Product, specifications, or its related documents, or in any way
misused, abused, or damaged; (b) has been damaged caused by accident, fire, liquid contact, earthquake, other external
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cosmetic damage caused by normal wear and tear or otherwise due to the normal aging of the Product, including but not
limited to scratches, dents and broken plastic on ports unless failure has occurred due to a defect in materials or

workmanship; (e) serial number has been removed or defaced from Product, resulting in not able to identify; (f) has been
damaged or out of order because Customer fails to implement any correction, modification, enhancement, improvement or
other update made available to Customer by Synology, or because Customer implements, installs or uses any correction,
modification, enhancement, improvement or other update made available by any third party; (g) has been damaged, out-of-
order, or incompatible due to installation or use with items not provided by Synology other than the hardware, software or
other accessory for which the Product is designed.
Please note that each of the above situations shall be subject to the inspection and verification of the product’s appearance
and functions by Synology.
3.3 Warranty Support and Exclusive Remedy. If Customer gives notice of noncompliance with any of the warranties set
forth in Section 3.1 within the applicable Warranty Period in the manner set forth below, then, upon verification of the
noncompliance by Synology, Synology will, at Synology's option: (a) use commercially reasonable efforts to repair the
Product, (b) provide technical support, or (c) replace the noncomplying Product or part thereof upon return of the complete
Product in accordance with Section 3.4 The foregoing sets forth Synology's entire liability and Customer's sole and
exclusive remedy for any breach of warranty under Section 3.1 or any other defect or deficiency in the Product. Customer
will reasonably assist Synology to diagnose and validate any nonconformity with the Product. Please note that the warranty
support does not apply to rescue of the data stored in Synology Product or its backup. Customer shall make a backup copy
of the stored data before it returns the Product to Synology, Synology may weed up all information or data in the Product
while it performs the warranty services and shall not be responsible or liable for any data loss therein.
3.4 Return. Any Product return by Customer under Section 3.3 must be made in accordance with Synology's then-current
return procedures with the purchase receipt or invoice. You may see more information about the return procedure at How
do I make a warranty claim for my Synology product? For warranty claims, the Customer must return the complete Product
to Synology in accordance with this Section 3.4. Any returned Product that (a) has been disassembled (except under the
direction of Synology); or (b) serial number has been removed or defaced from Product, resulting in not able to identify, or
(c) was damaged on the way of return due to improper packaging (including but not limited to scratches and deformation),
will be refused and returned to Customer at Customer's expense. Any Product must be returned in the same condition as it
was received from Synology to the address designated by Synology, freight pre-paid, in packaging sufficient to protect the
contents thereof. Customer is responsible for insurance and risk of loss/damage with respect to returned items until they
are properly received by Synology.
3.5 Replacement of New Product or Refurbished Product by Synology. If Synology elects to replace any Product under this
Warranty set forth in Section 3.1, then Synology will ship a replacement Product at Synology's expense via the shipping
method selected by Synology after receipt of the nonconforming Product returned in accordance with Section 3.4 and
validation by Synology that the Product does not conform to the warranty. Before the shipment of the Refurbished Product
to the Customers, they have been verified to strictly comply with Synology's quality standard. Please note that part of the
Refurbished Products would be with certain stain, scratches, or other minor wear and tear. In some countries, Synology
may at its own discretion apply the Synology Replacement Service to certain Products, through which Synology will ship a
replacement Product to Customer before its receipt of the nonconforming Product returned by Customer ("Synology
Replacement Service").
3.6 Disclaimer of Warranties. THE WARRANTIES, OBLIGATIONS, AND LIABILITIES OF SYNOLOGY AND THE
REMEDIES OF CUSTOMER SET FORTH IN THIS WARRANTY ARE EXCLUSIVE AND IN SUBSTITUTION FOR, AND
CUSTOMER HEREBY WAIVES, RELEASES AND DISCLAIMS, ALL OTHER WARRANTIES, OBLIGATIONS AND
LIABILITIES OF SYNOLOGY AND ALL OTHER RIGHTS, CLAIMS AND REMEDIES OF CUSTOMER AGAINST
SYNOLOGY, EXPRESS OR IMPLIED, ARISING BY LAW OR OTHERWISE, WITH RESPECT TO THE PRODUCT,
ACCOMPANYING DOCUMENTATION OR SOFTWARE AND ANY OTHER GOODS OR SERVICES DELIVERED UNDER
THIS WARRANTY, INCLUDING, BUT NOT LIMITED TO ANY: (A) IMPLIED WARRANTY OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR PURPOSE OR USE; (B) IMPLIED WARRANTY ARISING FROM COURSE OF
PERFORMANCE, COURSE OF DEALING, OR USAGE OF TRADE; (C) CLAIM OF INFRINGEMENT OR
MISAPPROPRIATION; OR (D) CLAIM IN TORT (WHETHER BASED ON NEGLIGENCE, STRICT LIABILITY, PRODUCT
LIABILITY OR OTHER THEORY). SYNOLOGY MAKES NO GUARANTEE AND SPECIFICALLY DISCLAIMS ANY
WARRANTY THAT THE DATA OR INFORMATION STORED ON ANY SYNOLOGY PRODUCT WILL BE SECURE AND
WITHOUT RISK OF DATA LOSS. SYNOLOGY RECOMMENDS THAT CUSTOMER TAKES APPROPRIATE MEASURES
TO BACK UP THE DATA STORED ON THE PRODUCT. SOME STATES/JURISDICTIONS DO NOT ALLOW
LIMITATIONS ON IMPLIED WARRANTIES, SO THE ABOVE LIMITATION MAY NOT APPLY TO CUSTOMER.
Section 4. Limitations of Liability
4.1 Force Majeure. Synology will not be liable for, or be considered to be in breach of or default under this Warranty on
account of, any delay or failure to perform as required by this Warranty as a result of any cause or condition beyond its
reasonable control (including, without limitation, any act or failure to act by Customer).
4.2 Disclaimer of Certain Damages. IN NO EVENT WILL SYNOLOGY OR ITS SUPPLIERS BE LIABLE FOR THE COST
OF COVER OR FOR ANY INCIDENTAL, INDIRECT, SPECIAL, PUNITIVE, CONSEQUENTIAL OR SIMILAR DAMAGES
OR LIABILITIES WHATSOEVER (INCLUDING, BUT NOT LIMITED TO LOSS OF DATA, INFORMATION, REVENUE,