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Product Overview

Manufacturer product information

Plug-and-play storage expansion for Synology DiskStation Add a new volume to your storage, or seamlessly expand RAID volumes on Synology DiskStation without reformatting drives with online volume expansion through DiskStation Manager (DSM) to minimize service disruptions. Plug-and-play design makes adding the DX1215II to an existing DiskStation simple. Unified drive management through DSM ensures health monitoring, storage allocation, and maintenance tasks are centralized and easily accessible to administrators. At Synology, we are committed to product innovation and quality. Synology guarantees a robust and reliable data management experience with a 5-year limited warranty, providing responsive technical support and hardware replacement services to maximize your return on investment. Learn more

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Technical Specifications

Structured product specifications

Applied Models > Supports creating volumes across different units FS series:FS101819 series:DS2419+II, DS2419+18 series:DS3018xs17 series:DS3617xsII, DS3617xs15 series:DS3615xs, DS2415+, DS2015xs13 series:DS2413+12 series:DS3612xs11 series:DS3611xs, DS2411+
Notes To have better performance, we recommend creating storage volumes physically located within the same NAS or Expansion Unit, rather than creating volumes across your NAS and Expansion Unit.DSM version requirement: 6.2.4-25556 or later version.
Storage > Drive Bays 12
Drive Type (See all supported drives) 3.5" SATA HDD2.5" SATA HDD2.5" SATA SSD
Notes #2 Synology only guarantees full functionality, reliability, and performance for Synology drives listed on the compatibility list. The use of non-validated components may limit certain functionality and result in data loss and system instability.
External Ports > Expansion Port 1
Appearance > Size (Height × Width × Depth) 270 mm x 300 mm x 340 mm
Weight 9.02 kg
Power > Power Recovery Synchronized with the Synology DiskStation
Power Supply Unit / Adapter 550 W
AC Input Power Voltage 100V to 240V AC
Power Frequency 50/60 Hz, Single Phase
Power Consumption 51.23 W (Access)21.71 W (HDD Hibernation)
British Thermal Unit 174.69 BTU/hr (Access)74.03 BTU/hr (HDD Hibernation)
Notes #3 Power consumption is measured when it is fully loaded with Western Digital 1TB WD10EFRX hard drive(s).
Temperature > Operating Temperature 5°C to 35°C (40°F to 95°F)
Storage Temperature -20°C to 60°C (-5°F to 140°F)
Operating Humidity 8% to 80% RH
Storage Humidity 5% to 95% RH
Others > System Fan 120 mm x 120 mm x 2 pcs
Noise Level 27.2 dB(A)
Notes #4 Noise Level Testing Environment: Fully loaded with Seagate ST2000VN000 hard drive(s) in the idle state. Two G.R.A.S. Type 40AE microphones, each set up 1 meter away from the Synology expansion unit at the front and rear. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8%.
Certification FCCCEBSMIEACRCMKC
Warranty 5 Years
Notes #5 The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
Environment RoHS Compliant
Packaging Content Main Unit × 1User's Guide X 1Accessory Pack × 1AC Power Cord × 1Expansion Cable: Infiniband X 1
Optional Accessories Enterprise Series 3.5" SATA HDD: HAT5300 SeriesPlus Series 3.5" SATA HDD: HAT3300 SeriesEnterprise Series 2.5" SATA SSD: SAT5200 Series