If you have tried to buy a 12TB or 14TB hard drive in recent months you will find that it is difficult to locate comparisons of the Seagate and Western Digital Options.
Because we needed to source a pile of these we developed the simple spec comparisons below and highlighted the notables:
12TB Comparison
| Brand | Seagate | Seagate | Western Digital | Western Digital |
| Product | Baracuda Pro | Exos X Series | HGST Ultrastar DC | Gold Enterprise |
| Part # | ST12000DM0007 | ST12000NM0007 | HUH721212ALE604 | WD121KRYZ |
| Capacity | 12TB | 12TB | 12TB | 12TB |
| Size | 3.5″ | 3.5″ | 3.5″ | 3.5″ |
| Rotation | 7200RPM | 7200RPM | 7200RPM | 7200RPM |
| Interface | SATA 6Gb/s | SATA 6Gb/s | SATA 6Gb/s | SATA 6Gb/s |
| Cache | 256MB | 256MB | 256MB | 256MB |
| Sustained Transfer | 250MB/s | 250MB/s | 250MB/s | 250MB/s |
| Latency | 4.16ms | 4.16ms | 4.16ms | 4.16ms |
| Acoustic Idle/Seek | 28/34 | 28/34 | 20/36 | 20/36 |
| Workload | 300TB/yr | 550TB/yr | 550TB/yr | 550TB/yr |
| MTBF | 1M Hours | 2.5M Hours | 2.5M Hours | 2.5M Hours |
| Warranty | 5 Years | 5 Years | 5 Years | 5 Years |
| Spec Sheet | Click HERE | Click HERE | Click HERE | Click HERE |
14TB Comparison
| Brand | Seagate | Western Digital |
| Product | Baracuda Pro | HGST Ultrastar DC |
| Part # | ST14000DM001 | WUH721414ALE6L4 |
| Capacity | 14TB | 14TB |
| Size | 3.5″ | 3.5″ |
| Rotation | 7200RPM | 7200RPM |
| Interface | SATA 6Gb/s | SATA 6Gb/s |
| Cache | 256MB | 512MB |
| Sustained Transfer | 250MB/s | 250MB/s |
| Latency | 4.16ms | 4.16ms |
| Acoustic Idle/Seek | 18/28 | 20/36 |
| Workload | 300TB/yr | 550TB/yr |
| MTBF | 1M Hours | 2.5M Hours |
| Warranty | 5 Years | 5 Years |
| Spec Sheet | Click HERE | Click HERE |
What is Happening with WD Disk Naming?
Take note that a couple of years ago Western Digital decided to rebrand its high end disks from “Gold” to “HGST Ultrastar” but they have apparently reversed that decision:
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