Synology DiskStation DS1821+ review: Hard to fault

A powerful desktop NAS offering every storage feature an SMB is likely to need at a very fair price

IT Pro RecommendedA photograph of the Synology DiskStation DS1821+ front and rear
Price
£788 exc VAT
  • Outstanding performance
  • Plenty of apps and features
  • Includes server-grade ECC RAM
  • No multi-Gigabit ports included as standard

The DS1821+ represents a change of direction for Synology: it’s one of a new range of NAS appliances that ditch the familiar Intel processors and put AMD in the driving seat instead. This model replaces the old DS1819+, and comes with a quad-core 2.2GHz AMD Ryzen V1500B processor in place of the 2.1GHz Intel Atom C3538 CPU.

There are other subtle upgrades too. Memory provision remains the same – 4GB of DDR4, upgradeable to 32GB – but the DS1821+ comes with server-grade ECC RAM to ensure business-class reliability.

And while the DS1821+’s sturdy charcoal-black steel chassis may appear the same as its predecessor’s, its eight hot-swap drive bays are now joined by dual M.2 NVMe SSD slots –although these can only be used for caching and not for regular storage. 

If you do need to extend capacity, that can be done round the back, via four USB-A 3.2 ports and dual eSATA ports, which connect to Synology’s five-bay DX517 expansion units.

Next to those connectors sit a quartet of Gigabit Ethernet ports; a free PCIe slot allows for an upgrade to 10GbE, but note that Synology is now focusing on its own-brand cards and no longer supports many third-party vendors. When we tried fitting an Emulex 10GbE card – which had worked fine in the DS1819+ – the DS1821+ simply hung during the boot. Luckily, it was happy to work with our dual-port Intel X520 model.

Installation proved undemanding. Synology’s discovery web portal quickly located the appliance on our network and downloaded the latest DSM 6.2 software. For testing, we installed four 14TB WD Red Plus drives and used the Storage Manager app to combine them into an SHR (Synology Hybrid RAID) storage pool.

A screen shot of the A photograph of the Synology DiskStation DS1821+ management software

We’ve certainly no complaints about speed. Accessing the unit over 10GbE from a Dell T640 Xeon Scalable host running Windows Server 2019, Iometer recorded read and write speeds of 9.2Gbits/sec and 8.7Gbits/sec. That’s just as fast as the DS1819+ for read performance, and a lot quicker for writing – the older model only managed 4.8Gbits/sec.

The DS1821+ aced our real-world tests too. We read a 25GB file from the appliance at 5Gbits/sec and wrote it back at 4.1Gbits/sec, while our backup test using a 22.4GB folder containing 10,500 small files was copied up at an average of 2.6Gbits/sec. Notably, the Ryzen CPU handles encryption much better than the Atom: our 25GB test file was written to an encrypted NAS folder at 2.6Gbits/sec, representing a 63% boost over the old model.

As for software, Synology’s DSM platform offers an exceptional range of features, especially when it comes to data protection. Btrfs volumes support both manual and scheduled snapshots, while the Hyper Backup app manages all local, remote, Rsync, cloud and iSCSI LUN backups from a single console.

The free Active Backup Suite adds extra options, comprising a set of three apps that can secure data on Windows systems, VMware and Hyper-V VMs and cloud data from Google Workspace and Microsoft 365. Recovery features are outstanding: after running agentless backups of VMs on our VMware vSphere 7 system, we were easily able to restore entire VMs back to the host or use the ABB portal to view guest OS files and restore them individually.

Meanwhile, the appliance itself is kept safe by the Security Advisor app, which scans regularly for malware and security issues and offers advice on closing any potential holes.

We’d have liked to see multi-Gigabit ports built in as standard, but even without them, the DS1821+ is an excellent NAS appliance. The AMD Ryzen CPU gives a real performance boost, the software is hard to fault - and it’s great value to boot. 

Synology DiskStation DS1821+ specifications

Chassis

Desktop chassis

CPU

2.2GHz AMD Ryzen V1500B

Memory

4GB DDR4 ECC (max 32GB)

Storage

8 x LFF/SFF hot-swap SATA drive bays

PSU

250W internal PSU

RAID support

Supports RAID0, 1, 10, 5, 6, SHR-1/2, hot-spare, JBOD

Network

4 x Gigabit Ethernet

Other ports

4 x USB-A 3.2, 2 x eSATA, PCIe slot

Management

Web browser management 

Dimensions (WDH)

343 x 243 x 166mm 

Warranty

3yr hardware warranty

Featured Resources

B2B under quarantine

Key B2C e-commerce features B2B need to adopt to survive

Download now

The top three IT pains of the new reality and how to solve them

Driving more resiliency with unified operations and service management

Download now

The five essentials from your endpoint security partner

Empower your MSP business to operate efficiently

Download now

How fashion retailers are redesigning their digital future

Fashion retail guide

Download now

Recommended

Synology DVA3221 review: Much more than a NAS
network attached storage (NAS)

Synology DVA3221 review: Much more than a NAS

22 Jul 2021
Synology RackStation RS2421RP+ review: AMD to the rescue
network attached storage (NAS)

Synology RackStation RS2421RP+ review: AMD to the rescue

17 Jun 2021
Synology RackStation RS4021xs+ review: A familiar face
network attached storage (NAS)

Synology RackStation RS4021xs+ review: A familiar face

10 Jun 2021
Synology RackStation RS1221RP+ review: Short and sweet
network attached storage (NAS)

Synology RackStation RS1221RP+ review: Short and sweet

21 May 2021

Most Popular

The benefits of workload optimisation
Sponsored

The benefits of workload optimisation

16 Jul 2021
RMIT to be first Australian university to implement AWS supercomputing facility
high-performance computing (HPC)

RMIT to be first Australian university to implement AWS supercomputing facility

28 Jul 2021
Samsung Galaxy S21 5G review: A rose-tinted experience
Mobile Phones

Samsung Galaxy S21 5G review: A rose-tinted experience

14 Jul 2021