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Plus Series 3.5" SATA HDD

Reliable hard drives purpose-built for Synology systems in home and small office environments.

The Synology advantage


Designed for 24/7 operation


Seamless firmware updates through DSM

One-stop support

Fast troubleshooting from Synology

Simply faster

DS923+ can handle more demanding application workloads and a greater number of concurrent users compared to prior-generation systems. Experience faster file indexing in Synology Drive, photo organization in Photos, and concurrent file transfers.1

Synology Drive

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faster file indexing

Synology Photos

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faster photo indexing

Multiple file transfers

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faster random write

Hard drives designed for Synology systems

Superior dependability

Using 100% conventional magnetic recording (CMR) technology, Plus Series disk drives ensure consistent write performance throughout their lifespans.

Easy firmware updates

Firmware updates can be performed directly through DSM, ensuring drives benefit from the latest patches while eliminating the need for disk removal.

Comprehensive testing

Synology Plus Series drives are subjected to thorough compatibility and stress testing to ensure smooth 24/7 operation under multi-user workloads.

3-year warranty

At Synology, we are committed to delivering innovative and high-quality products. The Plus Series drives come with a 3-year limited warranty that includes top-notch technical support and hardware replacement services.3

Made for your storage system

RackStation RS422+

  • Over 590 MB/s sequential read
  • Compact 1U 12-inch depth design
  • Optional 10GbE support

RackStation RS422+

  • Built-in M.2 NVMe slots for SSD cache or storage pools
  • Optional 10GbE expansion
  • Up to 32 GB DDR4 ECC memory

RackStation RS422+

  • Quad-core 1.7 GHz CPU
  • Quiet and energy efficient
  • Btrfs file system support


  1. Workload is defined as the amount of data written, read, or verified by commands from a host system.

  2. Mean time between failures (MTBF) is not an estimate or guarantee of product life. It is a statistical value related to mean failure rates for a large number of products and may not accurately reflect actual operation. Actual operating life of the product may be different from the MTBF.

  3. The warranty period starts from the purchase date as stated on the receipt of purchase.

Hardware Specifications
General Capacity 4 TB 6 TB 8 TB 12 TB
Form Factor 3.5″ 3.5″ 3.5″ 3.5″
Interface SATA 6 Gb/s SATA 6 Gb/s SATA 6 Gb/s SATA 6 Gb/s
Performance Rotational Speed 5,400 rpm 5,400 rpm 5,400 rpm 7,200 rpm
Maximum Sustained Data Transfer Speed (Typ.) 202 MB/s 202 MB/s 202 MB/s 240 MB/s
Reliability Warranty 3 Years 3 Years 3 Years 3 Years
Notes The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
Power Consumption Active Idle (Typ.) 3.96 W 3.4 W 3.4 W 5.07 W
Random Read / Write (4KB Q1) (Typ.) 4.85 W 5.3 W 5.3 W 8.33 W
Notes Power consumption may differ according to configurations and platforms.
Temperature Operating 0°C to 65°C (32°F to 149°F) 0°C to 65°C (32°F to 149°F) 0°C to 65°C (32°F to 149°F) 5°C to 65°C (41°F to 149°F)
Non-operating -40°C to 70°C (-40°F to 158°F) -40°C to 70°C (-40°F to 158°F) -40°C to 70°C (-40°F to 158°F) -40°C to 70°C (-40°F to 158°F)
Applied Models