Synology RS4021xs+ 16-Bay Rackmount NAS | Enterprise Storage, Virtualization & High-Performance Data Protection Solution

Why Choose This Product?

The Synology RS4021xs+ is engineered for enterprise environments that demand high-speed storage, business continuity, and scalable infrastructure. Featuring an 8-core Intel Xeon processor, built-in redundant power supplies, and expansion up to 40 drives, it provides a reliable platform for virtualization, collaboration, surveillance, and backup operations. DSM-powered tools simplify management while ensuring advanced data protection and operational efficiency.

Core Features & Benefits

Centralized Storage & Scalability

The Synology RS4021xs+ includes 16 drive bays supporting both 3.5″ SATA HDDs and 2.5″ SATA SSDs. It can scale up to 40 drive bays using expansion units, making it ideal for enterprise deployments with rapidly growing storage requirements.

Connectivity & Compatibility

Equipped with four 1GbE ports and dual built-in 10GbE RJ-45 ports, the system delivers high-bandwidth networking for intensive workloads. Dual PCIe Gen3 slots support additional network adapters and NVMe SSD cache cards for enhanced performance and scalability.

Performance & Hardware

Powered by an Intel Xeon D-1541 8-core processor with ECC memory, the system achieves over 403,000 random read IOPS and 6,200 MB/s sequential read speeds, ensuring smooth handling of virtualization, databases, and multi-user business operations.

Software & Ecosystem (DSM)

Running on Synology DiskStation Manager (DSM), the NAS provides centralized management for storage, collaboration, and backup. Applications such as Synology Drive, MailPlus, Chat, and Calendar enable secure team productivity within a private cloud infrastructure.

Security & Data Protection

Built on the Btrfs file system, the system supports advanced snapshots, file self-healing, inline compression, and flexible storage quotas. Active Backup Suite, Hyper Backup, and Snapshot Replication provide enterprise-grade disaster recovery and data protection capabilities.

Virtualization & Surveillance

The Synology RS4021xs+ supports VMware vSphere, Microsoft Hyper-V, Citrix Hypervisor, and OpenStack environments. Synology Virtual Machine Manager enables Windows, Linux, and Virtual DSM instances, while Surveillance Station supports up to 285 IP camera streams for enterprise surveillance deployments.

Key Features & Highlights

• 16-Bay Rackmount NAS – Expandable up to 40 drives
• Intel Xeon 8-Core CPU – Enterprise-grade performance
• Up to 6,200 MB/s Read Speed – Ultra-fast throughput
• 403K+ IOPS – Optimized for demanding workloads
• Dual Built-in 10GbE Ports – High-speed connectivity
• Dual PCIe Expansion Slots – Flexible upgrade options
• Redundant Power Supplies – Business continuity
• DSM OS – Enterprise storage management platform
• Supports Up to 285 IP Camera Streams – Surveillance-ready
• 5-Year Warranty – Long-term reliability

Hardware Overview

Front Panel

• Power button & indicator
• Alert off button
• Drive trays
• Drive status indicators

Rear Panel

• Dual redundant power supplies
• PSU indicators & alert off buttons
• PSU fans
• Console port
• 4 x 1GbE RJ-45 ports
• 2 x 10GbE RJ-45 ports
• USB 3.2 ports
• Expansion ports
• PCIe expansion slots
• Reset button

Software & Ecosystem

The NAS runs on Synology DSM and supports SMB, NFS, FTP, WebDAV, Rsync, iSCSI, Fibre Channel, LDAP, and CalDAV protocols. Enterprise applications include Synology Drive, MailPlus, Office, Chat, Active Backup Suite, Hyper Backup, Snapshot Replication, and Virtual Machine Manager for collaboration, protection, and virtualization.

Ideal Use Cases

• Enterprise Storage – Large-scale centralized data management
• Virtualization Infrastructure – Host VMs and storage workloads
• Backup & Disaster Recovery – Protect business-critical systems
• Private Cloud – Secure collaboration and file sharing
• Surveillance Storage – Enterprise-grade IP camera recording
• High-Speed Workloads – Databases and multi-user operations

FAQs

1. How many drives does it support?
It supports 16 drives and can expand up to 40 drives.

2. Does it include built-in 10GbE networking?
Yes, it includes dual built-in 10GbE RJ-45 ports.

3. Is it suitable for virtualization?
Yes, it supports VMware, Hyper-V, Citrix, OpenStack, and Synology Virtual Machine Manager.

4. Does it include redundant power supplies?
Yes, it comes with dual redundant power supplies for business continuity.

5. What warranty does it include?
It comes with a 5-year limited hardware warranty.