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Enterprise Series 3.5" SAS HDD

Enterprise-grade SAS HDDs for Synology systems

Engineered for top performance and reliability in Synology systems

Unmatched integration with DSM and Synology hardware enable HAS5300 SAS hard drives to reliably deliver class-leading performance in enterprise deployments. HAS5300 drives have passed 200,000 hours of rigorous testing on Synology hardware, feature a 2.5M-hour MTTF, and are covered by Synology’s 5-year limited warranty1.


Up to 281 MB/s sustained data transfer2


Up to 27% faster drive repair in Synology NAS3


Rated for 2.5 million hours MTTF


One-click drive firmware updates through DSM

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


The HAS5300 series drives leverage the low-latency SAS protocol. When paired with high-performance and highly scalable Synology SA or UC series solutions, they ensure that mission-critical workloads always have access to dependable and fast storage.

Back to peak performance faster

Building on two decades of storage expertise, Synology HAS5300 drives run on firmware optimized for critical workloads that matter. They allow Synology systems to repair degraded RAID arrays up to 27% faster than similar-class and capacity drives.

Hard drives designed for Synology systems


Rigorous tests and compatibility verification4 ensure maximum reliability on Synology systems, even while handling the most extreme workloads.

One-click firmware upgrades

Automatic firmware update notifications and one-click installation through DSM minimizes maintenance workload and reduces the chance of oversight.



A 2.5 million-hour MTTF5 , support for up to 550 TB per year workloads, and persistent write cache technology come together to safeguard data integrity.


5-year warranty

At Synology, we are committed to product innovation and quality. HAS5300 drives are backed by a 5-year limited warranty that includes technical support and hardware replacement services to maximize your return on investment.  Learn more

High performance storage systems

High Scalability SA3600

  • 12-core CPU Turbo Boost up to 2.7 GHz
  • Over 5,500 MB/s sequential throughput reading
  • Scale up to 180/96 drives

High Scalability SA3200D

  • Dual controller architecture
  • 4-core CPU Turbo Boost up to 2.7 GHz
  • Over 90,000 4K random write IOPS

Unified Controller UC3200

  • Dual active controllers
  • High availability iSCSI service
  • Over 436K/143K random read/write IOPS


  1. The warranty period starts from the purchase date as stated on the receipt of purchase.
  2. Maximum sustained data transfer speed of HAS5300-16T drives.
  3. Performance testing was conducted by Synology using 12 drives on an SA3600, configured using RAID 5 and a Btrfs file system, against similar capacity (12TB) and class (Enterprise) drives. Results are for reference only. Actual performance may vary depending on workload, testing methods, and how devices and software are configured.
  4. Among the HAS5300-8T, HAS5300-12T, and HAS5300-16T drives, over 200,000 hours of tests have been conducted on SAS-compatible Synology devices to ensure compatibility and performance expectations of these drives when used on Synology solutions.
  5. Mean Time to Failure (MTTF) is not a guarantee or estimate of product life; it is a statistical value related to mean failure rates for a large number of products which may not accurately reflect actual operation. Actual operating life of the product may be different from the MTTF and is affected by environmental and usage conditions.
  6. Product images are for illustrative purposes only. Actual product may appear with different labeling or housing, which do not affect the performance characteristics of the product.
Hardware Specifications
General Capacity 8 TB 12 TB 16 TB
Form Factor 3.5″ 3.5″ 3.5″
Interface SAS 12 Gb/s SAS 12 Gb/s SAS 12 Gb/s
Performance Rotational Speed 7,200 rpm 7,200 rpm 7,200 rpm
Maximum Sustained Data Transfer Speed (Typ.) 230 MiB/s 242 MiB/s 262 MiB/s
Reliability Warranty 5 Years 5 Years 5 Years
Notes The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
Power Consumption Active Idle (Typ.) 6.62 W 4.36 W 4.46 W
Random Read / Write (4KB Q1) (Typ.) 9.87 W 7.80 W 8.12 W
Notes Power consumption may differ according to configurations and platforms.
Temperature Operating 5°C to 60°C (41°F to 140°F) 5°C to 60°C (41°F to 140°F) 5°C to 60°C (41°F to 140°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)
Applied Models