Seagate Exos X12 12TB SAS (ST12000NM0027)Specs, test results and price
Currently sold out, 1 unit tested since Oct 2026 · 1 units tested in-house
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No ST12000NM0027 units listed right now
We restock this model from new lots as they pass testing. Ask for a quote and we will hold units from the next batch, or browse what is in stock today.
About the ST12000NM0027
The Seagate Exos X12 (ST12000NM0027) is a 12TB SAS 12Gb/s hard drive built in a 3.5 inch form factor. It is intended for servers and storage arrays that use SAS connectivity for multi-path access and high availability.
Each unit listed under this part number is tested individually before sale. Testing includes a sequential and random read/write benchmark, a full extended self-test across the entire drive surface, a cross-check of power-on hours against an independent on-drive log, a SMART health read covering reallocated, pending and uncorrectable sectors, and a NIST 800-88 sanitize with read-back verification to clear prior data.
The unit tested and sold under this part number logged 33,802 power-on hours, placing it in the Standard Use tier (20,000 to 40,000 hours). In benchmark testing it reached a median sequential read speed of 251 MB/s and a median sequential write speed of 245 MB/s.
Specifications
| Brand | Seagate |
|---|---|
| Part number | ST12000NM0027 |
| Type | Hard drive |
| Capacity | 12TB |
| Interface | SAS 12Gb/s |
| Form factor | 3.5 in |
Tested units
- Units tested
- 1
- Pass rate
- 100% (1 of 1)
- Units sold
- 1
- Power-on hours, median
- 33,802 h
- Power-on hours, range
- 33,802 to 33,802 h
- First tested
- Oct 6, 2026
- Last tested
- Oct 11, 2026
- Sequential read, median
- 251 MB/s
- Sequential write, median
- 245 MB/s
Every unit of this model we have handled, from our test database. What we test
Hours distribution
- Standard Use 20,000-40,000 hrs1 unit · 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-312 | Standard Use | 33,802 | Oct 11, 2026 | Pass | View report for unit U-312 |
Price history
Monthly median of what our own ST12000NM0027 units sold for.
| Month | Median price |
|---|---|
| Oct 2026 | $264.95 |
ST12000NM0027 questions
What kind of workloads is this drive suited for?+
As a 12TB SAS hard drive, it fits bulk storage, backup targets, and capacity-oriented server storage, particularly in multi-drive arrays that rely on SAS connectivity for redundancy and multi-path access.
Will this drive work with my server's controller?+
It uses a SAS 12Gb/s interface in a 3.5 inch form factor, so it is compatible with SAS backplanes and controllers that support 12Gb/s SAS drives of that form factor.
What does your testing process check on each unit?+
Each unit goes through a sequential and random read/write benchmark, a full extended self-test across the whole surface, a power-on hours cross-check against the drive's internal log, and a SMART health read for reallocated, pending and uncorrectable sectors.
What does the Standard Use tier mean for this drive?+
The Standard Use tier applies to drives with between 20,000 and 40,000 recorded power-on hours. The unit sold under this part number logged 33,802 hours, which falls within that range.
Is the drive's prior data wiped before it is sold?+
Yes, every unit is processed with a NIST 800-88 sanitize overwrite and the result is verified with a read-back check before sale.