Synology DX1215II 12-Bay SATA Storage Expansion Unit

• Enterprise NAS capacity expansion for compatible Synology DiskStation systems
• Backup storage growth for increasing business data volumes
• Centralized file storage expansion for offices and departments
• Virtualization data storage expansion for supported NAS environments
• Surveillance recording capacity expansion
• Business data archival and retention
• Disaster recovery storage expansion
• Storage infrastructure modernization without replacing the host NAS
• RAID capacity expansion through Synology DSM
• Long-term DiskStation lifecycle extension

• 12 drive bays provide substantial additional storage capacity
• Supports 3.5-inch SATA HDDs and 2.5-inch SATA HDDs
• Supports 2.5-inch SATA SSDs for compatible deployments
• Hot-swappable drive design simplifies storage maintenance
• One InfiniBand expansion port connects to supported DiskStation systems
• RAID management is available through Synology DSM
• Online volume expansion can add capacity without reformatting drives
• Plug-and-play design simplifies integration with compatible DiskStation systems
• Unified DSM management supports centralized storage administration
• Two 120 mm × 120 mm × 25 mm system fans provide chassis cooling
• Power recovery synchronizes with the connected Synology DiskStation
• RoHS-compliant construction supports enterprise procurement requirements
• Compact desktop form factor minimizes deployment footprint
• Requires DSM 6.2.4-25556 or later on the host device 

• Brand: Synology
• Part Number: DX1215II
• Product Type: Expansion Unit
• Drive Bays: 12
• Compatible Drive Types: 3.5" SATA HDD, 2.5" SATA HDD, 2.5" SATA SSD
• Hot-Swappable Drives: Yes
• RAID Management: Synology DSM
• Expansion Port: 1 × InfiniBand
• Dimensions (H × W × D): 270 × 300 × 340 mm
• Weight: 9.02 kg
• System Fans: 2 × 120 × 120 × 25 mm
• AC Input Voltage: 100 V to 240 V AC
• Power Frequency: 50/60 Hz, Single Phase
• Operating Temperature: 5°C to 35°C
• Storage Temperature: -20°C to 60°C
• Relative Humidity: 5% to 95% RH
• Maximum Operating Altitude: 5,000 m
• Environment Compliance: RoHS
• Host DSM Requirement: DSM 6.2.4-25556 or later 

WHY CHOOSE THIS PRODUCT?

• DX1215II is a strong choice when a compatible DiskStation needs additional storage without moving to a new NAS platform. Its 12 hot-swappable bays, InfiniBand connection, DSM integration, and compact enclosure provide a straightforward path for capacity growth, infrastructure upgrades, and longer hardware utilization. Buyers should confirm host-model and drive compatibility before procurement.