Contents

Synology NAS RS4021xs+ Hardware Installation Guide
- Chapter 1: Before You Start
  - Package Contents
  - Synology RS4021xs+ at a Glance
  - System Modes and LED Indicators
  - Other LED Indicators
  - Hardware Specification
  - Spare Parts
  - PSU LED Indicators
  - Optional Accessories
  - Safety Instructions
- Chapter 2: Hardware Setup
  - Tools and Parts for Drive Installation
  - Install Drives
  - Install Memory Modules
  - Install PCle Add-in Cards
  - Install and Remove Rail Kits
  - Expansion Unit Deployment and Topology
  - Start up Your Synology NAS
- Chapter 3: System Maintenance
  - Replace System Fan
  - Replace Power Supply Unit (PSU)
- Chapter 4: Install DSM on Synology NAS
  - Install DSM with Web Assistant
  - Learn More

Synology RS4021xs+ v2 Installation Guide

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Synology RS4021xs+ Specification

The Synology RS4021xs+ is a high-performance, rackmount NAS solution designed for businesses requiring robust data management capabilities. It is powered by an Intel Xeon D-1541 8-core processor with a base clock speed of 2.1 GHz, which can boost up to 2.7 GHz, ensuring powerful processing efficiency for demanding applications. This model comes equipped with 16GB of DDR4 ECC UDIMM memory, expandable up to 64GB, providing enhanced data integrity and protection against potential data corruption.

The RS4021xs+ features 16 drive bays, supporting both 3.5-inch SATA HDDs and 2.5-inch SATA SSDs, allowing for a maximum raw capacity of up to 256TB, which can be further expanded with Synology RX1217(RP) expansion units. It supports advanced file systems such as Btrfs, offering reliable data protection through features like snapshot replication and self-healing capabilities. The NAS is equipped with dual 10GbE RJ-45 ports and four 1GbE RJ-45 ports, ensuring high-speed network connectivity and versatile bonding options to enhance performance and reliability.

For scalability and flexibility, the RS4021xs+ includes three PCIe 3.0 slots, permitting the installation of additional network interface cards or SSD cache adapters. It also supports Synology High Availability, providing automatic failover and ensuring seamless service continuity. With its robust software suite, including Synology DiskStation Manager (DSM), the RS4021xs+ offers comprehensive business applications and virtualization support, making it suitable for a wide array of enterprise environments. Overall, the Synology RS4021xs+ delivers a reliable, scalable, and high-performance storage solution that meets the evolving needs of modern businesses.

Synology RS4021xs+ F.A.Q.

How do I set up a RAID configuration on the Synology RS4021xs+?

To set up a RAID configuration, access the DiskStation Manager (DSM), navigate to the 'Storage Manager', select 'Storage Pool', and use the setup wizard to configure the desired RAID level.

What is the procedure for expanding storage capacity on the RS4021xs+?

To expand storage, install additional drives into the empty bays, then use the 'Storage Manager' in DSM to expand the existing storage pool or create a new one.

How can I perform a system backup on the RS4021xs+?

Use Synology's Hyper Backup application available in DSM to back up data to various destinations, including other Synology NAS devices, external drives, or cloud services.

How do I ensure data security and encryption on my Synology RS4021xs+?

Enable AES 256-bit encryption for shared folders within DSM, and use secure protocols such as HTTPS, FTPS, or VPN for data transmission.

What steps should I take if the RS4021xs+ is not powering on?

Check power connections, ensure the outlet is active, verify the power supply unit (PSU) is functioning, and consult the hardware manual for troubleshooting tips.

How do I update DSM on the RS4021xs+?

Log into DSM, navigate to 'Control Panel', select 'Update & Restore', and follow the instructions to download and install the latest DSM version.

What are the common network settings to configure for optimal performance on the RS4021xs+?

Configure link aggregation for higher throughput, set up VLANs for traffic segmentation, and enable Jumbo Frames for improved network performance.

How do I replace a failed drive in the RS4021xs+?

Identify the failed drive using DSM notifications, remove it from the NAS, insert a new drive, and repair the storage pool via the 'Storage Manager'.

How can I monitor system health and performance on the RS4021xs+?

Use the 'Resource Monitor' and 'Storage Manager' in DSM to check CPU, memory usage, disk health, and network activity continuously.

What should I do if I forget the admin password for the RS4021xs+?

Press the RESET button on the NAS for about 4 seconds until you hear a beep, then follow the instructions in DSM to reset the password.