Synology DX1215II 12-Bay Expansion Unit
Description
The Synology DX1215II is a diskless 12-bay desktop expansion unit that seamlessly adds storage capacity to compatible Synology DiskStation servers. Featuring 12 hot-swappable 3.5″/2.5″ SATA bays, a high-bandwidth mini-SAS HD expansion port, and a 550 W power supply, it enables online RAID volume and storage expansion without interrupting services. Backed by a 5-year limited warranty, the DX1215II is engineered for reliable, 24/7 scalability in home offices, studios, and small business environments.
Hardware Specifications
| Specification | Details |
|---|---|
| Drive Bays | 12 × hot-swappable 3.5″/2.5″ SATA HDD/SSD |
| Expansion Interface | 1 × mini-SAS HD (Infiniband-type) |
| Power Supply | 550 W internal |
| Power Consumption (Access) | 51.23 W |
| Power Consumption (Hibernation) | 21.71 W |
| Dimensions (H × W × D) | 270 × 300 × 340 mm |
| Weight | 9.02 kg |
| Operating Temperature | 5 °C to 35 °C |
| Storage Temperature | –20 °C to 60 °C |
| Warranty | 5-year limited |
Key Features
- Online Volume Expansion
Grow or add RAID volumes via DiskStation Manager (DSM) without reformatting or downtime. - Plug-n-Play Integration
Auto-detects and integrates with supported DiskStation models for unified storage management. - Synchronized Power Control
Powers on/off in tandem with the host NAS to simplify deployment and reduce human error. - High Availability Ready
Works with clustered or high-availability DiskStations to deliver uninterrupted service. - Energy-Efficient Design
Supports host-controlled hibernation to lower power draw when idle.
Performance & Scalability
- Capacity Scaling
Supports up to 192 TB raw capacity (12 × 16 TB drives) in RAID configurations. - Throughput
High-bandwidth mini-SAS HD link delivers near-native internal drive performance. - Future Growth
Stack multiple units for even greater expansion on select Synology systems.
Compatibility
Compatible with Synology DiskStation models requiring a 12-bay expansion, including:
- FS series: FS1018
- 19-series: DS2419+ / DS2419+ II
- 18-series: DS3018xs
- 17-series: DS3617xs / DS3617xs II
- 15-series: DS3615xs / DS2415+ / DS2015xs
- 13-series: DS2413+
- 12-series: DS3612xs
- 11-series: DS3611xs / DS2411+
Ideal Use Cases
- Desktop NAS users needing seamless capacity upgrades
- Small offices centralizing file, backup, and surveillance storage
- Home studios expanding multimedia archives
- Remote and branch offices requiring local storage scalability
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