Synology Plus Series 3.5 Inch SATA HDD
Synology Plus Series Storage for an Always-On NAS Synology Plus Series hard drives provide CMR storage for compatible Synology systems used for shared files, computer...
Synology Plus Series Storage for an Always-On NAS
Synology Plus Series hard drives provide CMR storage for compatible Synology systems used for shared files, computer backups, media libraries and other everyday NAS workloads. The range combines a 3.5-inch SATA interface with drive firmware management through DiskStation Manager, helping you keep storage maintenance within the same system you use to manage your files.
Choose the capacity that fits your NAS model and storage pool. This listing contains HAT3300, HAT3310 and HAT3320 models with capacity-specific performance, power and operating limits. Check the exact part number before adding drives to an existing array.
Highlights
- CMR recording: conventional magnetic recording for NAS write workloads.
- Designed for continuous operation: a storage range for compatible home and small-office Synology systems.
- Capacity-specific performance: 5,400rpm or 7,200rpm models with maximum sustained transfer rates up to 295MB/s.
- Integrated maintenance: supported drive firmware updates through DSM without removing the drive.
- Three-year limited warranty: manufacturer coverage starting from the purchase date on the receipt.
Key Features
Storage Matched to Your Synology System
Plus Series drives are intended for supported Synology NAS configurations rather than a universal fit for every NAS, server or expansion unit. Match the complete drive model and capacity to the system's compatibility information, including any DSM or drive-firmware requirements.
When expanding a storage pool, allow for the selected RAID or SHR layout and existing disk sizes. Raw drive capacity is different from usable storage after formatting, system use and redundancy. Larger replacement drives may require a supported expansion procedure before their extra capacity becomes usable.
CMR for Daily Shared Storage
Conventional magnetic recording is used across the Plus Series. This suits the repeated writes involved in shared folders, scheduled backups and multi-user access. Synology validates the drives with its storage systems and reports over 500,000 hours of cumulative compatibility and stress testing for the range.
A drive's workload rating covers data read, written and verified by the host. It is not a daily transfer guarantee or a substitute for choosing a suitable NAS and storage layout. The HAT3320-8T carries a 300TB/year workload rating; the 4TB, 6TB, 12TB, 16TB and 20TB models listed here are rated for 180TB/year.
Understand the Differences Between Capacities
The HAT3300-2T, HAT3300-4T and HAT3300-6T operate at 5,400rpm. HAT3320-8T, HAT3310-12T, HAT3310-16T and HAT3320-20T operate at 7,200rpm. Maximum sustained transfer rates range from 180MB/s on the 2TB model to 295MB/s on the 20TB model.
Cache, drive construction, acoustics and power demand also differ by model. Use the exact-model specifications when planning cooling, noise-sensitive placement or a larger storage pool. Network speed and NAS processing can limit real-world transfer rates below the drive's own maximum.
Keep Firmware Maintenance in DSM
On supported Synology systems, DSM notifies you of available drive firmware updates and provides an integrated update workflow. This avoids removing drives for maintenance with a separate computer and keeps the process alongside the NAS storage-management tools.
Drive health monitoring and redundant storage help with maintenance, but neither replaces a separate backup. Keep an additional copy of important files outside the main storage pool and test that it can be restored.
Summary
Synology Plus Series HDDs suit compatible Synology NAS systems that need CMR storage, continuous operation and integrated firmware maintenance. Select the exact capacity and part number supported by your system, then plan the storage pool around its usable capacity, workload and backup requirements.
Synology Plus Series 3.5 Inch SATA HDD
Synology Plus Series HDDs use CMR recording and a 3.5-inch SATA interface for compatible Synology systems. The selected drive determines spindle speed, cache, performance, power use and operating limits. The table separates these differences so you can plan a storage pool without applying the family maximum to every capacity. Check the exact drive model and NAS requirements before installation. Drive-level transfer figures do not guarantee the same speed across a NAS network connection.
| Specification | Details |
|---|---|
| Drive Family | |
| Product | Synology Plus Series NAS hard drive |
| Form factor | 3.5-inch |
| Interface | SATA 6Gb/s |
| Recording technology | CMR |
| Use | Continuous operation in compatible Synology systems |
| Capacity basis | 1TB = 1 trillion bytes; formatted and usable capacity is lower |
| Capacity and Performance | |
| 2TB HAT3300-2T | 5,400rpm; up to 180MB/s maximum sustained transfer |
| 4TB HAT3300-4T | 5,400rpm; up to 202MB/s maximum sustained transfer; 256MB cache |
| 6TB HAT3300-6T | 5,400rpm; up to 202MB/s maximum sustained transfer; 256MB cache |
| 8TB HAT3320-8T | 7,200rpm; up to 281MB/s maximum sustained transfer; 512MB cache |
| 12TB HAT3310-12T | 7,200rpm; up to 281MB/s maximum sustained transfer; 512MB cache |
| 16TB HAT3310-16T | 7,200rpm; up to 281MB/s maximum sustained transfer; 512MB cache |
| 20TB HAT3320-20T | 7,200rpm; up to 295MB/s maximum sustained transfer; 1GB cache |
| Power by Model | |
| HAT3300-2T | Typical active idle 2.8W; 4KB Q1 random read/write 3.1W |
| HAT3300-4T | Typical active idle 3.96W; 4KB Q1 random read/write 4.85W |
| HAT3300-6T | Typical active idle 3.4W; 4KB Q1 random read/write 5.3W |
| HAT3320-8T | Typical active idle 5.74W; 4KB Q1 random read/write 9.07W |
| HAT3310-12T | Typical active idle 3.3W; 4KB Q1 random read/write 6.85W |
| HAT3310-16T | Typical active idle 4.14W; 4KB Q1 random read/write 7.48W |
| HAT3320-20T | Typical active idle 4.35W; 4KB Q1 random read/write 7.62W |
| Operating Limits | |
| HAT3300-2T | 0–65°C |
| HAT3300-4T | 0–65°C |
| HAT3300-6T | 0–65°C |
| HAT3320-8T | 5–60°C |
| HAT3310-12T | 5–60°C |
| HAT3310-16T | 5–60°C |
| HAT3320-20T | 5–60°C |
| Non-operating temperature | −40–70°C |
| Operating humidity | 5–90% RH non-condensing for the listed 4TB–20TB models |
| Non-operating humidity | 5–95% RH non-condensing for the listed 4TB–20TB models |
| Drive Construction and Reliability | |
| Drive construction | HAT3300-4T / HAT3300-6T / HAT3320-8T: air; HAT3310-12T / HAT3310-16T / HAT3320-20T: helium-sealed |
| Sector format | 512e for the listed 4TB–20TB models |
| Workload rating | HAT3320-8T: 300TB/year; HAT3300-4T / HAT3300-6T / HAT3310-12T / HAT3310-16T / HAT3320-20T: 180TB/year |
| MTBF | HAT3300-4T / HAT3300-6T: 1 million hours; listed 8TB / 12TB / 16TB / 20TB models: 1.2 million hours |
| Warranty | Three-year limited manufacturer warranty from the purchase date on the receipt |
| MTBF qualification | Population-level statistical rating; not a guarantee of an individual drive's service life |
| Physical and System Integration | |
| HAT3300-4T dimensions and mass | 20.20 × 101.85 × 147mm (H × W × D); 490g |
| Other model dimensions | HAT3300-6T / HAT3320-8T / HAT3310-12T / HAT3310-16T / HAT3320-20T: 26.1 × 101.85 × 147mm (H × W × D) |
| Device mass | 6TB: 610g; 8TB: 755g; 12TB / 16TB: 720g; 20TB: 730g |
| Firmware maintenance | Updates through DSM on supported systems |
| Compatibility | Verify the exact drive part number, capacity, NAS or expansion-unit model and required DSM/firmware before installation |
| Supplied item | Internal hard drive; NAS system sold separately |
Operating power varies with the platform and workload. Device mass excludes shipping packaging. RAID is not a substitute for a separate backup.
| Sizes |
2TB, 4TB, 6TB, 8TB, 12TB, 16TB, 20TB |
|---|