Synology DiskStation DS1821+ SAN/NAS Storage System

Designed for scalability and performance, the Synology DiskStation DS1821+ SAN/NAS Storage System is engineered to meet the demands of IT enthusiasts and growing SMBs. This 8-bay powerhouse blends enterprise‑grade reliability with flexible storage options, advanced data protection, and a comprehensive software ecosystem. Whether you are consolidating file sharing, powering virtualization workloads, or implementing a robust backup strategy, the DS1821+ delivers fast data access, streamlined management, and adaptive expansion. Built around a capable processor and expandable memory, it handles mixed workloads—from heavy I/O to multiple users—without compromising reliability. With integrated M.2 NVMe caching, optional 10GbE networking, and scalable expansion, this NAS/SAN hybrid is designed to grow with your business needs while keeping downtime and risk to a minimum.

• Scalable 8-bay NAS with flexible expansion up to 18 bays when paired with DX517 expansion units, enabling you to add capacity as your data footprint grows.
• Business-grade data protection and backup options, including snapshots, replication, and comprehensive backup solutions that guard against data loss from accidental deletion, ransomware, or hardware failure.
• High-performance compute and caching, featuring a capable processor and memory that accelerate file sharing, virtualization, and multimedia workflows, with M.2 NVMe cache to boost random I/O.
• Flexible connectivity with a PCIe 3.0 slot for optional 10GbE network cards or NVMe cache accelerators, plus multiple LAN configurations and seamless integration with virtualization platforms.
• Smart software suite powered by DiskStation Manager (DSM), delivering powerful storage management, security tools, automated backups, and collaborative features for teams.

Technical Details of Synology DiskStation DS1821+ SAN/NAS Storage System

• Drive Bays: 8 hot-swappable SATA bays (3.5" or 2.5" drives) for flexible capacity and upgrade paths.
• Expansion: Supports optional DX517 expansion units to scale up to 18 bays for growing data needs.
• Processor: High-performance AMD Ryzen-based quad-core processor designed for SMB workloads and virtualization tasks.
• Memory: DDR4 ECC memory with upgradeability to support demanding services and multiple users.
• Cache: M.2 NVMe SSD cache slots available to accelerate random I/O and improve overall throughput for hot workloads.
• Networking: Built-in network interfaces plus a PCIe slot to add 10GbE or other network adapters for faster data transfer and improved scalability.
• File System & Data Protection: Uses Synology DSM with Btrfs file system options, snapshots, and replication for robust data protection.
• Software: DiskStation Manager (DSM) operating system with comprehensive backup, synchronization, and virtualization features.
• Expansion & Virtualization: Compatible with virtualization suites and container workloads, enabling Virtual Machine Manager and Docker ecosystem on compatible configurations.
• Power & Efficiency: Designed for reliable 24/7 operation with energy-efficient components suitable for always-on storage.

how to install Synology DiskStation DS1821+

• Unbox the DS1821+ and ensure you have compatible 3.5" or 2.5" SATA drives ready for installation.
• Install the RAM if you are upgrading from the base configuration, ensuring the module seats securely in the memory slots.
• Slide the drives into the 8 hot-swappable bays until every tray is firmly in place, then close the chassis.
• Connect the DS1821+ to your network using an Ethernet port, and attach the power cable to a reliable power source.
• Power on the unit and open your web browser to locate the device with Synology Assistant or by entering the DS1821+’s IP address.
• Follow the on-screen setup wizard to install DSM, initialize storage pools, and configure volumes according to your preferred RAID level.
• Create shared folders, set up user accounts and permission schemes, and enable essential security features such as 2-step verification and firewall rules.
• Set up automated backups with Hyper Backup or Snapshot Replication, and configure remote or cloud backups to protect against data loss.
• If needed, install a DX517 expansion unit to scale storage further, or add a PCIe network card for 10GbE connectivity.

Frequently asked questions

• Is the DS1821+ suitable for small business backups?
  Yes. The DS1821+ provides robust backup options through DSM, including Hyper Backup, Snapshot Replication, and cross-site replication to protect critical business data.
• How many drives does it support and can I expand later?
  The DS1821+ includes 8 drive bays and can be expanded to 18 bays using the DX517 expansion unit, offering scalable capacity as your data grows.
• Can I run virtualization or containers on this NAS?
  Yes. With DSM and compatible hardware resources, the DS1821+ supports virtualization features through Virtual Machine Manager and container workloads via Docker, suitable for test labs and production services.
• Does it support SSD cache?
  Yes. The DS1821+ includes M.2 NVMe cache slots to accelerate performance for I/O-intensive workloads and improve responsiveness during peak usage.
• What security and data protection features are included?
  DS1821+ leverages DSM’s security suite, built-in firewall, 2-step verification, encrypted folders, and snapshot-based protection to guard against data loss and ransomware.