Synology DX1215II 12-Bay Expansion Unit
Add twelve hot‑swappable SATA bays to compatible Synology DiskStation via InfiniBand. Plug‑and‑play integration in DSM, with online expansion, low noise, and a 5‑year warranty.
Product Overview
Synology DX1215II is a desktop‑style expansion chassis that adds twelve hot‑swappable SATA bays (3.5″ or 2.5″ HDD/SSD) to supported Synology DiskStation NAS devices. It connects using a high‑speed InfiniBand interface and is fully managed within Synology DiskStation Manager (DSM). Once linked, storage volumes can be expanded or created without downtime or reformatting, seamlessly integrating into the existing storage environment to support growing capacity needs.
Key Features
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12 hot‑swappable SATA drive bays (supports 3.5″ HDD, 2.5″ HDD, or SATA SSD)
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InfiniBand expansion port for high-throughput, low-latency connection.
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Plug-and-play integration via DSM—no additional setup required.
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Online volume and RAID expansion without reformatting or downtime.
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Engineered for Synology-certified HDD/SSD use for reliability and compatibility.
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Quiet operation (~27.2 dB(A)) with dual 120 mm fans and optimized power usage (~51 W active, ~21.7 W idle).
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Rated for 24/7 use with a robust 550 W PSU and backed by a 5-year warranty and optional advance replacement service.
Specs
| Specification | Details |
|---|---|
| Drive Bays | 12 × hot-swappable SATA (3.5″ or 2.5″ HDD/SSD) |
| Interface | 1 × InfiniBand expansion port |
| RAID Management | Handled via DSM on host NAS |
| Dimensions (H×W×D) | 270 × 300 × 340 mm |
| Weight | ~9.02 kg |
| Power Supply | Internal 550 W PSU, 100–240 VAC |
| Power Consumption | ~51.23 W (active), ~21.7 W (HDD hibernation) |
| Cooling | 120 mm × 2 system fans |
| Noise Level | ~27.2 dB(A) |
| Temperature Range | Operating: 5 °C–35 °C, Storage: –20 °C–60 °C |
| Warranty | 5‑year limited warranty |
Why Choose This Product
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Massive plug‑and-play expansion: Add 12 bays without disrupting existing volumes.
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DSM integration: Manage drives as if internal—monitor health, configure RAID, track usage all in one interface.
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Efficient and quiet: Ideal for office environments or network closets.
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Reliable design: High-quality build, Synology-certified drive support, and a generous warranty deliver peace of mind.
FAQs
Q1: Which DiskStation models are compatible?
Supported hosts include DS2419+, DS2419+ II, DS3018xs, DS3617xs/II, DS3615xs, DS2415+, DS2015xs, DS2413+, DS3612xs, and DS3611xs/DS2411+ (DSM 6.2.4‑25556 or later required)
Q2: Can I extend a volume across both the host NAS and DX1215II?
Technically yes, but it’s strongly discouraged. If the expansion unit or its cable fails, it could corrupt the entire volume. Best practice is to use separate volumes or pools per chassis.
Q3: What maximum raw capacity is supported?
Up to 192 TB (12 × 16 TB drives)—though capacity may vary depending on DSM limitations and drive validation lists.
Q4: Can I mix drive types or brands?
While drive mixing is physically possible, Synology recommends using drives from its compatibility list (e.g. HAT5300, HAT3300, SAT5200 series) to ensure full functionality and warranty support.
Q5: Are there alternatives for NAS models with only eSATA ports?
No—DX1215II uses InfiniBand. Only DX series like DX517 support eSATA. Attempting to connect DX1215II to NAS units lacking InfiniBand may not work reliably or at all.
Q6: Is the unit suitable for continuous operation?
Yes. Its cooling, build, and Synology’s SRS next‑day advance replacement service support 24/7 deployment in business environments.
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