NAS Synology SA3400D Rack 2U Intel Xeon D-1541 8GB DDR4

The Synology SA3400D Rack 2U is a high-availability NAS designed for business environments that require reliable file and block storage. Powered by an Intel Xeon D-1541 processor and 8 GB DDR4 memory, the SA3400D supports NAS and SAN roles with flexible expansion options, hot‑swappable controllers, and support for up to 12 drive bays per unit. It is intended for unified data management, sharing, backup and virtual machine storage on a scalable rack-mounted platform.

Advantages

The SA3400D provides automatic minute-level failover using two independent, hot-swappable controllers in an active-passive configuration to maintain service continuity for file sharing, block storage and backups. It delivers strong throughput and random I/O performance for SMB/NFS file services and iSCSI or Fibre Channel block storage. Capacity can be expanded up to 576 TB by adding two RXD1219sas expansion units, and network and I/O performance can be enhanced with optional 10/25GbE add-in cards. SAS SSDs can be used to create all-flash volumes or read/write cache to improve IOPS and reduce latency on HDD volumes.

Suitable for

• Centralized file sharing (SMB, NFS) for teams and departments
• Block storage for virtualization and databases (iSCSI, Fibre Channel)
• Business backup and disaster recovery
• Scalable rack-mounted storage deployments in data centers

Key specifications

• Form factor: 2U rack chassis
• Processor: Intel Xeon D-1541 (2.1 GHz)
• Memory: 8 GB DDR4
• Drive bays supported: 12 per unit (no drives preinstalled)
• Supported drive types: HDD and SSD (SAS/SATA depending on configuration)
• RAID: supported
• High availability: dual hot-swappable controllers, active-passive failover
• Expandable capacity: up to 576 TB with two RXD1219sas expansion units
• Network: supports optional 10/25GbE add-in cards
• Weight: 19.7 kg

How to use

Install the SA3400D in a standard 19-inch rack and connect power and network cabling according to your datacenter routing. Populate the drive bays with supported HDDs or SSDs as required, configure RAID arrays using Synology DSM, and set up services such as SMB/NFS shares, iSCSI targets, or backup tasks. For high availability, ensure both controllers are installed and configured in active-passive mode. To expand capacity, attach RXD1219sas expansion units and configure the added bays within DSM. Optional 10/25GbE cards can be installed in available expansion slots to increase network throughput.

Recommendations

For reliable performance in mixed workloads, use Synology-certified drives and follow Synology’s compatibility lists. Place the SA3400D in a controlled environment with proper cooling and redundant power where possible. Regularly update DSM firmware and verify failover configuration through routine testing to ensure continuous availability.