Storage solutions company Synology has released ‘value’ versions of two of its recent NAS systems that use lower spec processors, less RAM and which have less comprehensive software packages. The Disk Station DS1817 and DS1517 are slightly scaled back alternatives to the DS1817+ and DS1517+ devices.

Technical differences include the use of 32-bit 1.7GHz Annapurna CPUs instead of the Intel Atom 64-bit 2.4GHz processors of the ‘+’ models, as well as 2GB (DS1517) and 4GB (DS1817) of RAM instead of up to 8GB. The DS1517 has no expandable memory options, while the DS1817 has built in 10GbE instead of the option to run with 10GbE or M.2 SSD cache like the DS1817+. As standard the DS1817 offers sequential throughput of up to 1,577 MB/s reading and 739 MB/s writing, while the DS1517 can manage reading throughput of up to 436.32 MB/s and writing throughput over 449.69 MB/s.

The DS1517 offers 5 drive bays and the DS1817 has eight, but both can couple with two DX517 expansion units which can hold a further five drives each. The maximum capacity of the DS1517 is 50TB, or 150TB when the two DX517 units capacity is included, while the DS1817 can manage 80TB, or 180TB with the DX517s .

The company says that the biggest differences between the value units and the ‘+’ units is the software packages that come with them. The value DS1817 and DS1517 come with fewer business applications and a more limited compatibility with certain file types.

  • DS1817 - $849.99/£689/€793 ex tax
  • DS1817+ (2GB) - $849.99/£688.33.80/€809 ex tax
  • DS1817+ (8GB) - $949.9/£745/€875 ex tax

  • DS1517 - $599.99/£567/€653 ex tax
  • DS1517+ (2GB) - $699.99/£567/€666 ex tax
  • DS1517+ (8GB) -$799.99/£623/€732 ex tax

Follow these links for more detailed comparisons between the DS1517 and DS1517+ and the DS1817 and DS1817+ on the Synology website. These products come with a 3-year warranty, though in many countries a further two years is available.

Press release

Synology® Introduces DiskStation DS1517 and DS1817

Powerful all-in-one NAS solution optimized for your growing needs

Synology® Inc. launched the new DiskStation DS1517 and DS1817, powerful and scalable 5-bay and 8-bay desktop NAS. DS1817 is the first Value series equipped with built-in 10GbE LAN ports and an expandable RAM module, delivering future-proof, high-speed storage for professionals and growing small/medium-sized businesses.

DS1817 is powered by a quad-core 1.7GHz processor with RAM module expandable up to 8GB. Thanks to the built-in 10GbE interfaces, DS1817 can achieve outstanding sequential throughput performance exceeding 1,577 MB/s reading and 739 MB/s writing when using RAID 5. The built-in 10GBASE-T ports and 1GBASE-T LAN ports pave the way for businesses to upgrade to a 10GbE environment, and provide the support of Link Aggregation and failover.

DS1517 is powered by a quad-core 1.7GHz processor, 2GB RAM, and four Gigabit LAN ports featuring failover and Link Aggregation. It delivers sequential throughput performance over 449 MB/s writing and 436 MB/s reading when using RAID 5.

"Growing small and medium-sized businesses expect a cost-effective storage solution that is versatile and expandable for their future demands, while minimizing the initial investment required," said Katarina Shao, Product Manager at Synology Inc. "The DS1517 and DS1817 are engineered to fulfill such needs, and provides the high performance and flexible scalability to manage, protect, and share data at work."

Both DS1517 and DS1817 can be scaled up to a raw capacity of 150TB and 180TB respectively with two DX517 expansion units. DS1517 and DS1817 support Synology High Availability (SHA), providing redundancy in case of unexpected network failure or disasters, and ensuring seamless transition between clustered servers. Moreover, DS1817 provides storage solutions for virtualization environments with VMware®, Citrix®, and Microsoft Hyper-V® certificates.

DS1517 and DS1817 run with DiskStation Manager (DSM) 6.1, the powerful and intuitive operating system for Synology NAS devices. Featuring a wide range of applications to bring better productivity at intensive work, DS1517 and DS1817 can serve as a centralized data backup destination. Synology has received numerous media accolades, such as topping the mid-range NAS category in TechTarget's storage solution survey.

DS1517 and DS1817 are backed by a limited 3-year hardware warranty. An additional extended warranty option is available in select regions for up to five years of coverage.

For more information on DS1517, please visit
For more information on DS1817, please visit
For more information on extended warranty, please visit