Synology RackStation 4-Core 2.2GHz 3U 16-Bay Storage Server

Description

High-Capacity SMB Storage with Enterprise Reliability

The RS2821RP+ is Synology’s answer to businesses that have outgrown entry-level NAS units and need something with real headroom. Sixteen hot-swap SATA bays in a 3U chassis, scalable to 28 drives with a compatible expansion unit, and headlined by an AMD Ryzen V1500B quad-core 2.2GHz processor with ECC memory support — this is a unit built to run continuously under load. Starting RAM is 4GB DDR4 ECC UDIMM, upgradeable to 32GB across two slots. ECC matters here: it prevents silent data corruption, which is exactly what you don’t want on a storage server carrying backups or shared business data.

Performance and Networking

Sequential read throughput reaches 2,220 MB/s with 105K 4K random read IOPS — with a 10GbE NIC installed. Out of the box, the RS2821RP+ ships with four 1GbE RJ45 ports with link aggregation and failover support. If your infrastructure has moved to 10GbE or 25GbE, PCIe expansion slots let you add faster networking and boost throughput up to five times using link aggregation. SSD caching is also supported, either via 2.5″ drives in the bays or through an optional M.2 NVMe adapter card.

DSM and Data Protection

This unit runs Synology’s DiskStation Manager (DSM) on a Btrfs file system, bringing snapshot-based recovery, iSCSI LUN support, and Active Backup for Business (covers Windows endpoints, VMware, and Microsoft 365 without per-device licensing fees). The redundant power supplies reduce the risk of a single power distribution failure taking down your data and services, and Synology High Availability allows pairing two identical units for automatic minute-level failover if your uptime requirements demand it.

What to Know Before You Buy

⚠️ Diskless — no drives included. Verify compatibility at Synology’s compatibility list before purchasing drives. ⚠️ 10GbE not included — the four built-in ports are 1GbE only. A PCIe NIC is required to reach the headline throughput figures. ⚠️ Expansion unit sold separately — scaling beyond 16 bays requires a compatible Synology expansion unit. ⚠️ Synology memory policy — the unit ships with Synology-branded ECC RAM; using third-party modules may void warranty and technical support coverage.

Key Highlights

• AMD Ryzen V1500B quad-core 2.2GHz processor with hardware encryption engine
• 4GB DDR4 ECC UDIMM RAM, upgradeable to 32GB (2 slots)
• 16 x hot-swap SATA bays (3.5″/2.5″), expandable to 28 drives
• Redundant power supplies included
• 4 x 1GbE RJ45 ports with link aggregation; PCIe slot for 10/25GbE upgrade
• Btrfs file system with snapshot protection and iSCSI LUN support
• Runs Synology DSM with Active Backup for Business (no per-device licensing)
• Synology High Availability support for active-passive failover
• Sliding rail kit included

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