Seagate Exos 12TB SATA (ST12000NM0127)Specs, test results and price
Currently sold out, 6 units tested since Oct 2026 · 6 units tested in-house
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About the ST12000NM0127
This listing covers the Seagate Exos ST12000NM0127, a 12TB enterprise hard drive with a SATA 6Gb/s interface, a 3.5 inch form factor, and a 7,200 rpm spindle speed. It is built for nearline and bulk storage roles such as backup targets, archival pools, and capacity-focused NAS or server arrays where sustained throughput and large per-drive capacity matter more than peak random IOPS.
Each of the 6 units in this batch was tested individually. Testing included a sequential and random read/write benchmark, a full extended (long) self-test across the entire surface, a SMART health read covering reallocated, pending, and uncorrectable sector counts and power-on hours, and a cross-check of reported power-on hours against an independent on-drive log. All 6 units passed every test and were then sanitized using ATA secure erase with read-back verification.
Across this batch, power-on hours ranged from 43,679 to 55,885, with a median of 52,310 hours, placing all 6 units in the Value usage tier. Median sequential throughput measured 254 MB/s read and 251 MB/s write during benchmarking.
Specifications
| Brand | Seagate |
|---|---|
| Part number | ST12000NM0127 |
| Type | Hard drive |
| Capacity | 12TB |
| Interface | SATA 6Gb/s |
| Form factor | 3.5 in |
| Rotational speed | 7,200 rpm |
Tested units
- Units tested
- 6
- Pass rate
- 100% (6 of 6)
- Units sold
- 6
- Power-on hours, median
- 52,310 h
- Power-on hours, range
- 43,679 to 55,885 h
- First tested
- Oct 25, 2026
- Last tested
- Oct 26, 2026
- Sequential read, median
- 254 MB/s
- Sequential write, median
- 251 MB/s
Every unit of this model we have handled, from our test database. What we test
Hours distribution
- Value over 40,000 hrs6 units · 100%
Units by usage tier, from their SMART power-on hours. How tiers work
Recent unit reports
Every unit we sell gets a permanent public report. Serial and seal numbers stay on the certificate in the box.
| Unit | Tier | Power-on hours | Tested | Result | Report |
|---|---|---|---|---|---|
| U-456 | Value | 55,747 | Oct 26, 2026 | Pass | View report for unit U-456 |
| U-455 | Value | 49,085 | Oct 26, 2026 | Pass | View report for unit U-455 |
| U-454 | Value | 43,679 | Oct 26, 2026 | Pass | View report for unit U-454 |
| U-453 | Value | 55,885 | Oct 26, 2026 | Pass | View report for unit U-453 |
| U-452 | Value | 55,535 | Oct 26, 2026 | Pass | View report for unit U-452 |
| U-451 | Value | 45,919 | Oct 26, 2026 | Pass | View report for unit U-451 |
Price history
Monthly median of what our own ST12000NM0127 units sold for.
| Month | Median price |
|---|---|
| Oct 2026 | $279.95 |
ST12000NM0127 questions
What kind of workloads is this drive suited for?+
At 12TB with a SATA 6Gb/s interface and 7,200 rpm spindle, this drive fits bulk storage, backup, and archival roles such as NAS arrays or nearline server storage where capacity and sustained sequential throughput are the priority.
Is this drive compatible with standard server and desktop hardware?+
Yes, it uses a SATA 6Gb/s interface in a 3.5 inch form factor, so it works with standard SATA ports, HBAs, and backplanes found in most servers, NAS units, and desktops.
What does testing on each unit actually check?+
Every unit goes through a sequential and random read/write benchmark, a full extended self-test across the whole surface, a SMART health read for reallocated, pending, and uncorrectable sectors, and a cross-check of power-on hours against an independent on-drive log, followed by a NIST 800-88 sanitize with read-back verification.
What does the Value usage tier mean for this model?+
All 6 units in this batch recorded over 40,000 power-on hours, with a median of 52,310 hours, which places them in the Value tier based on accumulated runtime at time of testing.
How was data removed from these drives before resale?+
Each unit was sanitized using ATA secure erase, with the erasure verified by a read-back check in line with NIST 800-88 guidance.