HGST Ultrastar DC HC520 12TB Alternatives: 6 Similar Picks Compared
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The HGST Ultrastar DC HC520 12TB is a robust drive designed for data centers and surveillance. It features 7200 RPM rotational speed and 256MB cache for high throughput. You might look for HGST Ultrastar DC HC520 12TB alternatives if you need a different form factor or interface. Some users prefer drives with specific recording technologies like CMR for better write stability. Others may want a different brand or capacity density. The drives in this list share key specifications with the HC520. They all offer 12TB capacity and 3.5-inch form factors. Each uses SATA interfaces and 7200 RPM speeds. This overlap ensures they fit similar high-performance NAS setups. You can compare these options based on their specific attributes. Some include helium sealing for efficiency. Others focus on enterprise durability or multi-user environments. This guide helps you find the right match for your storage needs.
Our top pick: HGST Ultrastar DC HC520 12TB SATA Hard Drive.
How each alternative compares
Seagate IronWolf Pro 12TB 7200 RPM NAS HDD
The Seagate IronWolf Pro 12TB shares the 7200 RPM speed and 256MB cache of the HGST drive, ensuring similar throughput for multi-user environments. It uses the same 3.5-inch form factor and SATA interface, making it a direct physical swap in most NAS enclosures. While the HGST model emphasizes helium design for power efficiency, the Seagate unit focuses on health monitoring features suited for active NAS setups. You should choose this alternative if you prioritize dedicated NAS firmware and workload ratings over the data center endurance profile of the HGST. The physical dimensions are nearly identical, with a slight weight difference that does not affect installation.
Western Digital WD Gold 12TB Enterprise HDD
The Western Digital WD Gold 12TB matches the HGST drive in rotational speed, cache size, and interface type. Both offer 12TB of capacity within a standard 3.5-inch chassis. The WD Gold is positioned for enterprise reliability and heavy workloads, similar to the HGST’s data center focus. However, the WD Gold lacks the specific helium-sealed design mentioned for the HGST, which may impact power consumption and heat output in dense arrays. If you need maximum durability for 24/7 operation without the helium technology, this is a strong option. The physical size is slightly different, but it remains compatible with standard drive bays.
Seagate IronWolf Pro 12TB 7200 RPM NAS HDD
This Seagate IronWolf Pro 12TB variant offers the same 7200 RPM speed and 256MB cache as the HGST Ultrastar. It is designed for heavy NAS workloads and RAID arrays. Like the original, it uses a 3.5-inch form factor and SATA interface. The key difference lies in the firmware and feature set, which are optimized for NAS environments rather than data centers. You might prefer this drive if you need specialized NAS health monitoring tools. The physical dimensions vary slightly in height and width, but it fits standard drive cages. It provides comparable performance for users who value NAS-specific reliability features over pure data center endurance.
Western Digital Ultrastar DC HC520 12TB HDD
The Western Digital Ultrastar DC HC520 12TB is essentially the same drive as the original, sharing the 7200 RPM speed, 256MB cache, and SATA interface. It is built for high-density storage arrays and enterprise use. The primary difference is the branding and specific model number, which may affect warranty terms or regional availability. Since it uses the same helium-sealed technology, power efficiency and thermal performance should be identical. This alternative is suitable if you find a better supply chain option or prefer the WD branding. The physical dimensions are consistent with the original HGST drive, ensuring a straightforward replacement in existing setups.
Western Digital 12TB WD Red Pro NAS Hard Drive
The Western Digital 12TB WD Red Pro 12TB matches the HGST drive in rotational speed, cache size, and interface. It is designed for high-performance multi-bay NAS systems. Unlike the HGST, which uses helium sealing, the WD Red Pro uses traditional air-filled technology, which may result in higher power consumption and heat generation. However, it offers CMR recording technology, which is beneficial for write-intensive NAS workloads. You should choose this alternative if you need a drive optimized for consumer NAS environments with active health monitoring. The physical size is similar, fitting standard 3.5-inch bays, but the weight and acoustic profile may differ.
Toshiba 14TB Enterprise 7200 RPM HDD (Renewed)
The Toshiba 14TB Enterprise HDD offers more capacity than the 12TB HGST drive, sharing the same 7200 RPM speed and 256MB cache. It uses a 3.5-inch form factor and SATA interface, making it compatible with most NAS enclosures. This drive is helium-sealed, similar to the HGST, which aids in power efficiency and cooling. The increased capacity allows for denser storage configurations. You should pick this alternative if you need more than 12TB of space in a single drive. The physical dimensions are larger, so you must verify that your NAS bay can accommodate the size. It provides higher capacity with similar performance characteristics for enterprise-level storage needs.
Quick picks
Our 7 picks
HGST Ultrastar DC HC520 12TB SATA Hard Drive
Best for: data centers and surveillance
- Storage Capacity
- 12TB
- Form Factor
- 3.5-Inch
- Hardware Interface
- SATA 6Gb/s
- Rotational Speed
- 7200RPM
- Cache Size
- 256MB
- Dimensions
- 5.79 × 4.01 × 1.03 inches
View on Amazon: HGST Ultrastar DC HC520 12TB SATA Hard Drive Affiliate link
The HGST Ultrastar DC HC520 is a 12TB 3.5-inch internal hard drive built for high-density storage. It features a 7200RPM rotational speed and 256MB cache with a SATA 6Gb/s interface. This helium-filled design offers power efficiency and durability. It suits cloud storage and centralized video surveillance needs. You get reliable performance for big data applications.
Pros
- 12TB storage capacity for large datasets
- 7200RPM rotational speed for fast access
- 256MB cache improves data handling
- Helium design lowers power usage
- SATA 6Gb/s interface compatibility
Cons
- Not optimized for quiet home environments
- Higher power draw than 5400RPM drives
- Enterprise focus limits home use
Good fit if
- You need high capacity for data centers
- You require reliable performance for surveillance
- You want power efficiency in rack setups
Skip if
- You need silent operation for home use
- You prefer smaller 3.5TB drives
- You want NVMe SSD speeds
Verdict: HGST Ultrastar DC HC520 12TB is a robust choice for data centers and surveillance systems. It fits users who prioritize capacity and efficiency over quiet operation.
Seagate IronWolf Pro 12TB 7200 RPM NAS HDD
Best for: multi-user NAS environments needing speed
- Storage Capacity
- 12TB
- Form Factor
- 3.5 Inch
- Hardware Interface
- SATA 6Gb/s
- Rotational Speed
- 7200 RPM
- Cache Size
- 256MB
- Bay Support
- up to 24-bay
View on Amazon: Seagate IronWolf Pro 12TB 7200 RPM NAS HDD Affiliate link
The Seagate IronWolf Pro 12TB is a 3.5-inch internal hard drive designed for multi-user NAS environments. It features 7200 RPM rotational speed, 256MB cache, and SATA 6Gb/s interface. With 12TB capacity and speeds up to 250MB/s, it suits users needing high performance and reliability. The drive includes IronWolf Health Management for monitoring and a five-year warranty.
Pros
- 12TB storage capacity for large data sets
- 7200 RPM rotational speed for faster access
- 256MB cache buffer improves performance
- SATA 6Gb/s interface for compatibility
- IronWolf Health Management system for monitoring
Cons
- Higher power consumption than 5400 RPM drives
- More noise and vibration due to 7200 RPM
- Limited to 24-bay NAS support
Good fit if
- You run a multi-user NAS with up to 24 bays
- You need high rotational speed for performance
- You want integrated health monitoring
Skip if
- You prioritize silent operation over speed
- You need more than 24-bay support
- You prefer lower power consumption
Verdict: Seagate IronWolf Pro 12TB NAS HDD is a high-performance drive for users who need speed and reliability in a multi-bay NAS setup. It fits those who value health monitoring and do not mind higher noise levels.
Western Digital WD Gold 12TB Enterprise HDD
Best for: Heavy workloads and enterprise reliability
- Storage Capacity
- 12TB
- Form Factor
- 3.5"
- Hardware Interface
- SATA 6 Gb/s
- Rotational Speed
- 7200 RPM Class
- Cache Size
- 256 MB
- Workload Rate Limit
- up to 550TB per year
View on Amazon: Western Digital WD Gold 12TB Enterprise HDD Affiliate link
The Western Digital 12TB WD Gold is an enterprise-class drive built for heavy workloads. It features 7200 RPM rotational speed, 256 MB cache, and a 550TB annual workload limit. HelioSeal technology helps manage power draw. You should choose this drive if you need high durability and vibration protection for demanding NAS environments.
Pros
- 7200 RPM rotational speed
- 256 MB cache size
- 550TB annual workload limit
- HelioSeal technology for efficiency
Cons
- Larger physical dimensions than some compact drives
- Heavier build at 1.46 pounds
- Higher power consumption than 5400 RPM models
Good fit if
- You need enterprise-grade reliability
- You run high-workload NAS systems
- You require vibration protection
Skip if
- You prioritize silent operation
- You need minimal power usage
- You want a compact form factor
Verdict: Western Digital 12TB WD Gold suits users who need maximum durability and performance for heavy workloads. It is ideal for 24/7 operation in demanding NAS setups.
Seagate IronWolf Pro 12TB 7200 RPM NAS HDD
Best for: Heavy NAS workloads and RAID arrays
- Storage Capacity
- 12 TB
- Form Factor
- 3.5 Inch
- Hardware Interface
- SATA 6 Gb/s
- Rotational Speed
- 7200 RPM
- Cache Size
- 256 MB
- Size
- 12TB
View on Amazon: Seagate IronWolf Pro 12TB 7200 RPM NAS HDD Affiliate link
The Seagate IronWolf Pro 12TB offers 12 TB of storage in a 3.5-inch form factor. It spins at 7200 RPM with a 256 MB cache and SATA 6 Gb/s interface. You get a transfer rate of 750 MB/s. This drive suits users needing high capacity and fast data access for RAID systems or heavy NAS workloads.
Pros
- 12 TB storage capacity
- 7200 RPM rotational speed
- 256 MB cache buffer
- 750 MB/s data transfer rate
Cons
- Heavier at 1.54 pounds
- SATA interface limits speeds
- No mention of vibration sensors
Good fit if
- You need 12 TB of storage
- You want 7200 RPM performance
- You use a 3.5-inch NAS
Skip if
- You need silent operation
- You prefer smaller drives
- You want NVMe speeds
Verdict: Seagate IronWolf Pro 12TB NAS HDD delivers high capacity and speed for heavy NAS use. It fits users prioritizing rotational speed and large storage in a standard 3.5-inch chassis.
Western Digital Ultrastar DC HC520 12TB HDD
Best for: high-density NAS storage arrays
- Storage Capacity
- 12TB
- Form Factor
- 3.5"
- Hardware Interface
- SATA 6 Gb/s
- Rotational Speed
- 7200 RPM Class
- Cache Size
- 256MB
- Workload Rate Limit
- up to 550TB per year
View on Amazon: Western Digital Ultrastar DC HC520 12TB HDD Affiliate link
This Western Digital drive offers 12TB of storage in a 3.5-inch form factor. It spins at 7200 RPM and uses a SATA 6 Gb/s interface. The 256MB cache supports fast data access. It handles up to 550TB of annual workload. You get 2.5M hours MTBF. This unit suits high-performance NAS setups requiring enterprise-grade reliability and vibration protection.
Pros
- 12TB storage capacity
- 7200 RPM rotational speed
- 256MB cache size
- 550TB per year workload rating
Cons
- Only 5-year limited warranty
- Heavy 1.42 pounds build
- SATA interface limits speed vs SAS
Good fit if
- You need high capacity for a NAS
- You run heavy workloads daily
- You want enterprise reliability
Skip if
- You need silent operation
- You want a smaller form factor
- You prefer SAS connectivity
Verdict: WD Ultrastar DC HC520 12TB HDD delivers strong performance for dense storage arrays. It fits users who prioritize capacity and workload endurance over quiet operation.
Western Digital 12TB WD Red Pro NAS Hard Drive
Best for: High-performance multi-bay NAS systems
- Storage Capacity
- 12TB
- Form Factor
- 3.5"
- Hardware Interface
- SATA 6 Gb/s
- Rotational Speed
- 7200 RPM
- Cache Size
- 256 MB
- Recording Technology
- CMR
View on Amazon: Western Digital 12TB WD Red Pro NAS Hard Drive Affiliate link
This Western Digital drive offers 12TB of storage for NAS systems. It uses CMR recording technology and spins at 7200 RPM for fast data access. The 256 MB cache helps manage heavy workloads. It is rated for 550TB per year. This drive suits users who need high performance in multi-bay enclosures.
Pros
- CMR recording technology for reliable performance
- 7200 RPM rotational speed
- 256 MB cache size
- 550TB/yr workload rate limit
- Optimized for unlimited bay NAS systems
Cons
- Heavier build at 1.76 ounces compared to lighter alternatives
- Higher power consumption due to 7200 RPM speed
- Larger physical dimensions than 2.5-inch drives
Good fit if
- You need high performance for RAID arrays
- You run a multi-bay NAS system
- You require CMR technology for data integrity
Skip if
- You prioritize quiet operation over speed
- You need energy-efficient storage for small setups
- You are using a 2.5-inch drive bay
Verdict: WD Red Pro 12TB NAS Drive delivers high-speed 7200 RPM performance and CMR reliability for demanding NAS environments. It fits users who need robust performance for multi-bay systems.
Toshiba 14TB Enterprise 7200 RPM HDD (Renewed)
Best for: High-density 14TB NAS storage
- Storage Capacity
- 14TB
- Form Factor
- 3.5"
- Hardware Interface
- SATA 6.0Gb/s
- Rotational Speed
- 7200RPM
- Cache Size
- 256MB
- Dimensions
- 7.5 × 5.5 × 2.5 inches
View on Amazon: Toshiba 14TB Enterprise 7200 RPM HDD (Renewed) Affiliate link
This 14TB drive uses a helium-sealed design with nine platters to maximize density. It spins at 7200 RPM and includes a 256MB cache for consistent performance. The SATA 6.0Gb/s interface ensures broad compatibility. You get a high-capacity solution suitable for demanding NAS environments where storage density and speed matter more than compact size.
Pros
- 14TB storage capacity
- 7200RPM rotational speed
- 256MB cache size
- Helium-sealed design
Cons
- Larger 2.5-inch height
- Heavier 1.5-pound build
- Renewed condition
Good fit if
- You need maximum storage density
- You prioritize 7200RPM speed
- You want a 14TB option
Skip if
- You require a new unit
- You need a 3.5-inch height
- You prefer lower capacity
Verdict: Toshiba 14TB Enterprise HDD offers high capacity and speed for users who need 14TB of storage in a dense helium-sealed drive.
Specifications side by side
| Spec | HGST Ultrastar DC HC520 12TB SATA Hard Drive | Seagate IronWolf Pro 12TB 7200 RPM NAS HDD | Western Digital WD Gold 12TB Enterprise HDD | Seagate IronWolf Pro 12TB 7200 RPM NAS HDD | Western Digital Ultrastar DC HC520 12TB HDD | Western Digital 12TB WD Red Pro NAS Hard Drive | Toshiba 14TB Enterprise 7200 RPM HDD (Renewed) |
|---|---|---|---|---|---|---|---|
| Storage Capacity | 12TB | 12TB | 12TB | 12 TB | 12TB | 12TB | 14TB |
| Form Factor | 3.5-Inch | 3.5 Inch | 3.5" | 3.5 Inch | 3.5" | 3.5" | 3.5" |
| Hardware Interface | SATA 6Gb/s | SATA 6Gb/s | SATA 6 Gb/s | SATA 6 Gb/s | SATA 6 Gb/s | SATA 6 Gb/s | SATA 6.0Gb/s |
| Rotational Speed | 7200RPM | 7200 RPM | 7200 RPM Class | 7200 RPM | 7200 RPM Class | 7200 RPM | 7200RPM |
| Cache Size | 256MB | 256MB | 256 MB | 256 MB | 256MB | 256 MB | 256MB |
| Recording Technology | not stated | not stated | not stated | not stated | not stated | CMR | not stated |
| Bay Support | not stated | up to 24-bay | not stated | not stated | not stated | unlimited number of bays | not stated |
| Workload Rate Limit | not stated | not stated | up to 550TB per year | not stated | up to 550TB per year | 550TB/yr | not stated |
| Size | 12TB | 12TB | 12TB | 12TB | 12TB | 12TB | not stated |
| Dimensions | 5.79 × 4.01 × 1.03 inches | 5.79 × 4.01 × 1.03 inches | 5.78 × 4 × 1.02 inches | 0.79 × 3.94 × 5.91 inches | 5.79 × 4 × 1.03 inches | 5.79 × 4 × 1.03 inches | 7.5 × 5.5 × 2.5 inches |
| Weight | not stated | 1.43 pounds | 1.46 pounds | 1.54 pounds | 1.42 pounds | 1.76 ounces | 1.5 pounds |
| Color | Silver | Multicolor | Gold | Mettalic | Gold | Red | Silver |
| Model | HUH721212ALE600 | ST12000NEZ008 | WD122KRYZ-SPCDAB0 | ST12000NE0007 | HUH721212ALE604 | WD121KFBX | MG07ACA14TE |
Frequently asked questions
Is the Seagate IronWolf Pro 12TB a good alternative to the HGST Ultrastar DC HC520?
Yes, it is a strong choice for multi-user NAS environments. It matches the HGST drive with 7200 RPM rotational speed and a 256MB cache. Both use the standard 3.5-inch form factor and SATA interface. This makes it a direct physical swap for most setups that require high speed and reliability.
What is the best budget-friendly 12TB drive compared to the HC520?
The Western Digital WD Gold 12TB Enterprise HDD is labeled as the best budget option. It offers 7200 RPM speed and 256MB cache, similar to the HGST model. It is designed for heavy workloads and 24/7 operation. This makes it ideal for demanding NAS setups where durability and performance are priorities.
Does the WD Red Pro 12TB use CMR technology like the HGST drive?
Yes, the WD Red Pro 12TB explicitly uses CMR recording technology. It also features 7200 RPM rotational speed and a 256MB cache. This combination supports high-performance multi-bay NAS systems. It fits users who need robust performance and reliability for demanding environments, similar to the capabilities of the HGST Ultrastar DC HC520.
Can I use a 14TB drive instead of the 12TB HGST Ultrastar?
You can consider the Toshiba 14TB Enterprise HDD for higher density storage. It offers 7200 RPM speed and a 256MB cache, matching the performance profile of the HGST drive. While it provides more capacity, note that its physical dimensions differ. It is designed for users who need 14TB of storage in a dense array.
Which alternative is best for high-density NAS storage arrays?
The Western Digital Ultrastar DC HC520 12TB HDD is highlighted for high-density NAS storage arrays. It delivers strong performance with 7200 RPM speed and 256MB cache. It suits users who prioritize capacity and workload endurance. This makes it a suitable alternative for dense storage configurations that require reliable, high-throughput operation.
Do these 12TB alternatives all use the same interface as the HGST drive?
Yes, all listed 12TB alternatives use the SATA hardware interface. This ensures compatibility with standard NAS systems and servers. They also share the 3.5-inch form factor and 7200 RPM rotational speed. This consistency allows for easy integration into existing setups that rely on the HGST Ultrastar DC HC520 specifications.