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Seagate IronWolf And Barracuda Pro 12TB: Storage Performance

Our Test Methods: Under each test condition, the hard drives tested here were installed as secondary volumes in our testbed, with a separate drive used for the OS and benchmark installations. Out testbed's motherboard was updated with the latest BIOS available at the time of publication and AHCI mode was enabled.

The drives were left blank without partitions for some tests, while others required them to be partitioned and formatted, as is the case with the ATTO and CrystalDiskMark benchmark tests. Windows firewall, automatic updates, and screen savers were all disabled before testing and Windows 10 Quiet Hours were enabled. In all test runs, we rebooted the system, ensured all temp and prefetch data was purged, waited several minutes for drive activity to settle and for the system to reach an idle state before invoking a test.

HotHardware Test System
Intel Core i7 and SSD Powered
Processor -

Motherboard -

Video Card -

Memory -

Audio -

Storage -

Intel Core i7-8700K

Gigabyte Z370 Ultra Gaming
(Z370 Chipset, AHCI Enabled)

Intel HD 630

16GB G.SKILL DDR4-2666

Integrated on board

Corsair Force GT (OS Drive)
Seagate IronWolf (12TB)
Seagate Barracuda Pro (12TB)
Seagate Barracuda (6TB)
WD Red (4TB)
OS -

Chipset Drivers -

DirectX -

Benchmarks -
Windows 10 Pro x64

Intel, iRST

DirectX 12

HD Tune v5.70
ATTO v3.05
CrystalDiskMark v6.0.0 x64
SiSoft SANDRA Pro 2017
ATTO Disk Benchmark
More Information Here:

ATTO is a "quick and dirty" type of disk benchmark that measures transfer speeds across a specific volume length. It measures raw transfer rates for both reads and writes and graphs them out in an easily interpreted chart. We chose .5KB through 64MB transfer sizes and a queue depth of 6 over a total max volume length of 256MB. ATTO's workloads are sequential in nature and measure raw bandwidth, rather than I/O response time, access latency, etc.



The Seagate IronWolf and Barracuda Pro perform similarly here, though the IronWolf finished just slightly ahead at the larger transfer sizes. We've also included some performance data from a Seagate Barracuda 6TB drive and WD Red 4TB drive for reference. As you can see, these new 12TB drives offer significantly more performance.

HD Tune v5.70 Pro
More Info Here:

EFD Software's HD Tune is described on the company's web site as such: "HD Tune is a hard disk utility with many functions. It can be used to measure the drive's performance, scan for errors, check the health status (S.M.A.R.T.), securely erase all data and much more." The latest version of the benchmark added temperature statistics and improved support for SSDs, among a few other updates and fixes.




The Seagate Barracuda 6TB drive offered the best access times of our test group, but the newer 12TB drives put up the best transfer speeds of the bunch.

CrystalDiskMark x64 Benchmarks
Synthetic File Transfer Tests

CrystalDiskMark is a synthetic benchmark that tests both sequential and random small and mid-sized file transfers using incompressible data. It provides a quick look at best and worst case scenarios with regard to SSD performance, best case being larger sequential transfers and worse case being small, random transfers.




The 12TB Barracuda Pro and IronWolf drives put up strong numbers in the various CrystalDiskMark tests as well -- for hard drives, at least. These numbers pale in comparison to even an entry level solid state drive, but they obviously target different use cases and you're certainly not going to find a 12TB SSD that costs $0.03 per gigabyte.


The SiSoft SANDRA Physical Disk benchmark was in-line with all of the previous tests and had the 12TB IronWolf and Barracuda Pro drive leading the pack, with read and write transfer speeds approaching 200MB/s.

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