---
product_id: 121184950
title: "HGST - WD Ultrastar DC HC520 HDD | HUH721212ALE600 | 12TB 7.2K SATA 6Gb/s 256MB Cache 3.5-Inch Helium Data Center Internal Hard Disk Drive"
brand: "helioseal"
price: "A$780"
currency: AUD
in_stock: true
reviews_count: 9
category: "Helio Seal"
url: https://www.desertcart.com.au/products/121184950-hgst-wd-ultrastar-dc-hc520-hdd-huh721212ale600-12tb-7-2k
store_origin: AU
region: Australia
---

# SATA 6Gb/s ultra-fast interface 12TB massive capacity 2.5M hours MTBF reliability HGST - WD Ultrastar DC HC520 HDD | HUH721212ALE600 | 12TB 7.2K SATA 6Gb/s 256MB Cache 3.5-Inch Helium Data Center Internal Hard Disk Drive

**Brand:** helioseal
**Price:** A$780
**Availability:** ✅ In Stock

## Summary

> 🚀 Elevate your data center game with Ultrastar’s powerhouse storage!

## Quick Answers

- **What is this?** HGST - WD Ultrastar DC HC520 HDD | HUH721212ALE600 | 12TB 7.2K SATA 6Gb/s 256MB Cache 3.5-Inch Helium Data Center Internal Hard Disk Drive by helioseal
- **How much does it cost?** A$780 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/121184950-hgst-wd-ultrastar-dc-hc520-hdd-huh721212ale600-12tb-7-2k)

## Best For

- helioseal enthusiasts

## Why This Product

- Trusted helioseal brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Massive 12TB Storage:** Store your entire digital empire with ease—perfect for hyperscale and cloud data centers.
- • **Power Disable Feature:** Advanced SATA tech for remote hard resets—future-proof your infrastructure with next-gen control.
- • **Rock-Solid Reliability:** 2.5 million hours MTBF and dual safe firmware ensure your data stays safe and accessible 24/7.
- • **Helium-Sealed Efficiency:** Industry-leading power savings with 52% less watts per TB vs. air-filled drives—eco-smart and cost-effective.
- • **Instant Secure Erase (ISE):** Wipe data instantly and securely—ideal for compliance and rapid repurposing in dynamic environments.

## Overview

The HGST WD Ultrastar DC HC520 is a 12TB helium-filled 3.5-inch enterprise HDD designed for data centers demanding high capacity, power efficiency, and unmatched reliability. Featuring a 7200 RPM spindle, SATA 6Gb/s interface, 256MB cache, and a 2.5 million hour MTBF rating, it delivers 50% more capacity and 52% less power consumption per TB compared to traditional air-filled drives. Ideal for cloud, hyperscale, and video surveillance applications, it includes advanced features like Instant Secure Erase and Power Disable for enhanced data security and management.

## Description

More Value to the Data Center with Maximum Capacity, Power Efficiency and Reliability Laying the foundation for a worry-free data center, Western Digital delivers capacity to conquer the data explosion – Ultrastar DC HC520, previously known as Ultrastar He12 and part of our HC500 series of helium-filled hard drives. Designed to handle workloads up to 550TB per year, the Ultrastar DC HC520 is the industry’s first 12TB drive and uses traditional perpendicular magnetic recording (PMR) technology to make it dropin ready for any enterprise-capacity application or environment. This high capacity helium drive offers one of the lowest power profiles in the industry to help data center architects meet eco-environmental goals and requirements. Targeted at 2.5M hours MTBF, the Ultrastar DC HC520 provides the highest reliability rating available of all HDDs on the market today by building on the successful design of its 10TB, 8TB and 6TB predecessors. Trust Western Digital and the Ultrastar DC HC520 to deliver more capacity, more efficiency, more reliability and more value to your data center. The Technology Helps Solve Challenges Facing Next Generation Data Centers Lowering the total cost of ownership (TCO) has become the focus of data center architects and the Ultrastar DC HC520 provides the best value proposition and greatest storage efficiency available. Compared to 8TB Ultrastar air-filled drives, this hard drive provides 50% more capacity, uses 52% less power (Watts/TB), and is 25% more reliable, rated at 2.5M hours MTBF.“Power Disable” feature is a new industry standard feature defined for SATA devices. This new feature allows the host system to perform a hard reset to the hard drive ( HDD )

Review: A fabulous drive with a good cost per TB (and projected great reliability) - This is an enterprise-quality drive --- a big investment in reliability and huge capacity. This is the first drive I've purchased with more than 6-TB (my preferred drives to date have been Western Digital Black 6TB drives). I have to say, I'm largely a convert. One little gotcha -- as a newer drive, and one aimed at the enterprise market, the screw holes for mounting the drive are not the same as the standard ones used on 500-GB to 6-TB drives of years past. Two are the same, and two are different on the sides, and similarly on the back. So while it's plug compatible (as a SATA drive) some mounting brackets are not compatible with it. I have an older Mac tower with four disk slots (mounting brackets not compatible) and an external RAID array enclosure with 4 disk slots (mounting insertion completely compatible). So, buyer beware ... look at the pictures of where the mounting screw holes are, and make sure they match your setup (the change is readily visible ... not a slight misalignment, but some holes missing, some extra threaded holes).
Review: i give up on this - First, I'm going to fault myself. I thought I had did my research on drives before pulling the trigger. i ultimately went with the HGST brand because it was getting good reviews and the helium tech seemed like a good buy in. This would have been my first drive in my NAS that I build. I failed to notice that this has POWER-DISABLED technology. I did not know what it was until i got this delivered. I have not been able to get this to work. For those who don't know, this was introduced a few years back and requires a special motherboard in order to allow the drive to be remotely disabled or rebooted. For us mortals, there is a work around for by disabling the 3rd pin in order to allow the drive to work. I ordered some kapton tape and covered the 3rd pin. When rebooting the PC and going into bios, I am able to see the drive. I then launch into windows 10 and the drive is not found. I go into disk management, still no drive. I reboot back into bios and the drive is no longer listed. I cut power to the machine for a few minutes and boot back up and it's the same cycle. I have just now ordered the molex to sata connector which bypasses the power going to the 3rd pin (which is recommended on the HGST site). Still no luck. It has been almost two weeks and I have not been able to get this to start. Unless you have a need for a drive to be power-disabled, I would steer clear of this drive. Now I'm stuck with a $330 brick unless I can return it. Very, very frustrated.

## Features

- Instant secure erase (ISE), endurance optimized with field-proven helium design
- Dual safe firmware for reliable updates, 2.5M MTBF, power efficient with low idle W/TB than air-filled drives
- High capacity storage for big data storage applications, perfect for cloud and hyperscale storage that need durability and security
- Optimal for high-density data centers and centralized video surveillance for reliability, capacity density, and power efficiency
- 12TB of storage capacity, SATA III interface, 256MB buffer, 7200 RPM spindle rotational speed
- Up to 2.5M hours MTBF with a 5 year limited OEM warrant direct with Authorized Reseller

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07PF1TVND |
| Best Sellers Rank | #626 in Internal Hard Drives |
| Brand | HelioSeal |
| Customer Reviews | 3.3 3.3 out of 5 stars (162) |
| Date First Available | March 19, 2019 |
| Flash Memory Size | 6 TB |
| Hard Drive | 12 TB Mechanical Hard Disk |
| Hard Drive Interface | SATA 6 GB/s |
| Hard Drive Rotational Speed | 7200 RPM |
| Item Dimensions LxWxH | 5.79 x 4.01 x 1.03 inches |
| Item Weight | 1.68 pounds |
| Item model number | 0F30144 |
| Manufacturer | HGST |
| Product Dimensions | 5.79 x 4.01 x 1.03 inches |
| Series | Ultrastar He12 |

## Product Details

- **Brand:** HelioSeal
- **Compatible Devices:** Desktop
- **Connectivity Technology:** SATA
- **Digital Storage Capacity:** 12000 GB
- **Hard Disk Description:** Mechanical Hard Disk
- **Hard Disk Form Factor:** 3.5 Inches
- **Hard Disk Interface:** SATA 6 GB/s
- **Hard Disk Size:** 12 TB
- **Installation Type:** Internal Hard Drive
- **Special Feature:** Portable

## Images

![HGST - WD Ultrastar DC HC520 HDD | HUH721212ALE600 | 12TB 7.2K SATA 6Gb/s 256MB Cache 3.5-Inch Helium Data Center Internal Hard Disk Drive - Image 1](https://m.media-amazon.com/images/I/61lC1gwLCZL.jpg)

## Questions & Answers

**Q: What is the warranty on this 12GB drive?**
A: Hi, The warranty is 5 Year Manufacture Warranty which can be claimed by going on WD.com under warranty claim. If you purchase from us Serverpartdeals and you have a failure we would be happy to assist you in getting a quick replacement. As a seller of these drives, we do not see failure rates to be alarming. More often with Enterprise Drives you have the quality to last you past 5 years of use. Shipping is also very important to make sure there is no damage to your drives, hence we use suspended HDD boxes custom made for these drives do avoid failure and intern warranty claims.

**Q: What is the date of manufacture?**
A: The drives I purchased were manufactured about a month before I received them. I believe these drives are still manufactured in the same factories which belonged to Hitachi before they were bought out by WD. But I don't know whether the particular drive you are looking at was on stock at Amazon or the supplier for longer than that. However, I would suggest you don't need to worry about the manufacturing date, as the warranty will start on purchase date. Let me tell you, these are the best and most reliable drives you can buy. I have Ultrastars running in my servers since over 10 years (yes, never replaced), none of those ever failed me.

**Q: What is the year of manufacture?**
A: I guess it depends on amazon's stock. Mine were manufactured a month before I received them. If you order now I'm confident you get 2020 drives.

**Q: s this hard drive work with desktop pc ?**
A: Yes

## Customer Reviews

### ⭐⭐⭐⭐⭐ A fabulous drive with a good cost per TB (and projected great reliability)
*by M***R on December 8, 2020*

This is an enterprise-quality drive --- a big investment in reliability and huge capacity. This is the first drive I've purchased with more than 6-TB (my preferred drives to date have been Western Digital Black 6TB drives). I have to say, I'm largely a convert. One little gotcha -- as a newer drive, and one aimed at the enterprise market, the screw holes for mounting the drive are not the same as the standard ones used on 500-GB to 6-TB drives of years past. Two are the same, and two are different on the sides, and similarly on the back. So while it's plug compatible (as a SATA drive) some mounting brackets are not compatible with it. I have an older Mac tower with four disk slots (mounting brackets not compatible) and an external RAID array enclosure with 4 disk slots (mounting insertion completely compatible). So, buyer beware ... look at the pictures of where the mounting screw holes are, and make sure they match your setup (the change is readily visible ... not a slight misalignment, but some holes missing, some extra threaded holes).

### ⭐ i give up on this
*by K***S on August 20, 2019*

First, I'm going to fault myself. I thought I had did my research on drives before pulling the trigger. i ultimately went with the HGST brand because it was getting good reviews and the helium tech seemed like a good buy in. This would have been my first drive in my NAS that I build. I failed to notice that this has POWER-DISABLED technology. I did not know what it was until i got this delivered. I have not been able to get this to work. For those who don't know, this was introduced a few years back and requires a special motherboard in order to allow the drive to be remotely disabled or rebooted. For us mortals, there is a work around for by disabling the 3rd pin in order to allow the drive to work. I ordered some kapton tape and covered the 3rd pin. When rebooting the PC and going into bios, I am able to see the drive. I then launch into windows 10 and the drive is not found. I go into disk management, still no drive. I reboot back into bios and the drive is no longer listed. I cut power to the machine for a few minutes and boot back up and it's the same cycle. I have just now ordered the molex to sata connector which bypasses the power going to the 3rd pin (which is recommended on the HGST site). Still no luck. It has been almost two weeks and I have not been able to get this to start. Unless you have a need for a drive to be power-disabled, I would steer clear of this drive. Now I'm stuck with a $330 brick unless I can return it. Very, very frustrated.

### ⭐⭐⭐ Lasted for just over Five Years.
*by A***R on June 29, 2025*

Worked well since : "Last purchased Feb 17, 2020." Now it's dead. It served me well, but I had hoped to get longer life from it. Regardless, too many other negative reviews and those saying that they received "used" drives. As a resulte, I'll pass on this brand for its replacement.

## Frequently Bought Together

- HGST - WD Ultrastar DC HC520 HDD | HUH721212ALE600 | 12TB 7.2K SATA 6Gb/s 256MB Cache 3.5-Inch Helium Data Center Internal Hard Disk Drive
- SABRENT USB 3.0 to SATA External Hard Drive Lay-Flat Docking Station for 2.5 or 3.5in HDD, SSD [Support UASP] (EC-DFLT)

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-02-17*