12TB enterprise 3.5-inch SAS hard drive
Synology HAS5300-12T 12TB Enterprise SAS HDD
The Synology HAS5300-12T is a 12TB, 7,200 rpm enterprise SAS hard drive for supported Synology systems, with a 12 Gb/s SAS interface, 512 MiB cache, 2.5-million-hour MTTF rating and five-year warranty.
- Capacity
- 12 TB
- Interface
- SAS 12 Gb/s
- Rotational speed
- 7,200 rpm
- Transfer speed
- 254 MB/s typical
Enterprise SAS capacity with Synology integration
The HAS5300-12T provides 12TB of SAS storage per drive with Synology-tested firmware integration, an enterprise workload profile and published reliability data. It is designed for supported Synology platforms where capacity, continuous operation and maintainable drive firmware are key buying considerations.
12TB SAS capacity
The 12TB model combines a 3.5-inch form factor with a 12 Gb/s SAS interface.
Enterprise workload rating
The HAS5300 series is rated for workloads up to 550 TB per year under Synology's stated definition.
Persistent write cache
Synology uses persistent write-cache technology to help protect data integrity during an unexpected power interruption.
DSM firmware integration
Supported firmware updates can be managed through DSM without a separate drive utility.
Synology system testing
The HAS5300 family underwent more than 200,000 hours of compatibility and stress testing on Synology hardware.
Five-year warranty
The drive combines five-year limited coverage with a published 2.5-million-hour MTTF rating.
Who is the Synology HAS5300-12T best for?
A strong choice for
- Supported Synology systems that require 3.5-inch SAS drives
- Enterprise storage needing 12TB per drive
- High-volume data, backup and storage workflows
- Administrators who want DSM-managed firmware maintenance
- Deployments requiring a five-year drive warranty
Consider another model if you need
- Your system supports SATA but not SAS
- The exact Synology system does not list HAS5300-12T as compatible
- You require a different capacity or newer listed drive model
Key specifications
- Capacity
- 12 TB
- Form factor
- 3.5-inch
- Interface
- SAS 12 Gb/s
- Rotational speed
- 7,200 rpm
- Maximum sustained transfer
- 254 MB/s typical
- Cache buffer
- 512 MiB
- MTTF
- 2.5 million hours
- Workload rating
- Up to 550 TB/year
- Active idle power
- 4.36 W typical
- Warranty
- 5 years
Full technical specifications
Hardware, performance and reliability
| Model | HAS5300-12T |
|---|---|
| Capacity | 12 TB |
| Form factor | 3.5-inch |
| Interface | SAS 12 Gb/s |
| Rotational speed | 7,200 rpm |
| Maximum sustained data transfer speed | 254 MB/s typical (242 MiB/s) |
| Cache buffer | 512 MiB |
| Mean time to failure (MTTF) | 2.5 million hours |
| Workload rating | Up to 550 TB per year |
| Warranty | 5 years |
Power and temperature
| Active idle power | 4.36 W typical |
|---|---|
| Random read/write power (4KB Q1) | 7.80 W typical |
| Power note | Power consumption may differ according to configurations and platforms. |
| Operating temperature | 5°C to 60°C (41°F to 140°F) |
| Non-operating temperature | -40°C to 70°C (-40°F to 158°F) |
Frequently asked questions about the Synology HAS5300-12T
What is the Synology HAS5300-12T?
It is a 12TB enterprise 3.5-inch SAS hard drive designed for supported Synology systems.
What interface does the HAS5300-12T use?
It uses SAS 12 Gb/s.
What rotational speed does the HAS5300-12T use?
The drive operates at 7,200 rpm.
What transfer speed is listed for the HAS5300-12T?
The supplied table lists 254 MB/s typical, corresponding to the 242 MiB/s figure in Synology's launch material.
How much cache does the HAS5300-12T have?
The official model specification states 512 MiB.
What is the HAS5300-12T MTTF rating?
The model carries a 2.5-million-hour MTTF rating, which is a statistical reliability measure rather than a life guarantee.
What workload rating applies to the HAS5300-12T?
Synology lists up to 550 TB per year for the HAS5300 series.
Can HAS5300-12T firmware be updated through DSM?
Synology states that supported firmware updates are delivered through DSM.
Which systems support the HAS5300-12T?
Check Synology's current compatibility list for the exact storage system before purchase.
What warranty applies to the HAS5300-12T?
It has a five-year limited warranty beginning from the purchase date shown on the receipt.
- Confirm SAS drive compatibility for the exact Synology system before purchase.
- MTTF is a statistical reliability value and does not guarantee an individual drive's operating life.
- Actual performance and power use can vary with workload and system configuration.
