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Seagate Exos 1.2TB 12Gb/s SAS10K 512n 128MB 2.5"

Seagate Exos 1.2TB 12Gb/s SAS10K 512n 128MB 2.5"

Bottom line: The Seagate Exos 1.2TB 12Gb/s SAS10K 512n 128MB 2.5" ($145.00 on Amazon as of 2026-10-07): 10,000 RPM spindle for fast enterprise random access; main trade-off: SAS-only; needs a SAS HBA or backplane, not SATA ports.

$145.00

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Buy on Amazon — $145.00 Compare to similar ssds & storage

By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For SSDs and PC storage upgrades, synthesises manufacturer specs and independent reviews rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

*Price sourced from Amazon.com. Last updated 2026-10-07. Price and availability subject to change.

Pros & Cons

Pros

  • ✓ 10,000 RPM spindle for fast enterprise random access
  • ✓ 12Gb/s SAS interface, double the throughput of 6Gb/s SATA
  • ✓ 128MB cache buffer smooths sustained server workloads
  • ✓ 2.5-inch SFF fits dense server and SAN drive bays

Cons

  • ✗ SAS-only; needs a SAS HBA or backplane, not SATA ports
  • ✗ Spinning 10K disk, far slower than SAS or NVMe SSDs
  • ✗ 1.2TB capacity is modest at this price point
  • ✗ 10K spindle runs hot and loud, needs server airflow

Manufacturer description

Seagate Exos 10E2400 ST1200MM0009 1.2TB Internal 2.5 Inch SFF SAS 12Gbps 10000RPM 128MB Buffer

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SpecPicks Verdict

SpecPicks scored Seagate Exos 1.2TB 12Gb/s SAS10K 512n 128MB 2.5" using a rating × review-volume × price-fit model applied to published specs and reviews across the ssds & storage category. Compare with similarly-priced alternatives in the ssds & storage category before committing. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for ssds & storage of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

  • ST1200MM0009

Full Specifications

BrandSeagate
Color512N
Model NameST1200MM0009
Unit Count1 Count
Form Factor2.5-inch
Media Speed150 MB/s
Model NumberST1200MM0009
Built-In MediaSeagate Exos 1.2TB E-Class Mission Critical 10000RPM 2.5-inch hard drive
Hard-Drive Size1.2 TB
Mfr Part NumberST1200MM0009
Number of Items1
Special FeaturePortable
Installation TypeInternal Hard Drive
Compatible DevicesSt1200mm0009
Additional FeaturesPortable
Hard Disk InterfaceSerial ATA
Hard Disk DescriptionMechanical Hard Disk
Hard Disk Form Factor2.5 inches
Hardware ConnectivitySAS
Connectivity TechnologySATA

Ready to buy?

Seagate Exos 1.2TB 12Gb/s SAS10K 512n 128MB 2.5" is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Buy on Amazon — $145.00

*Price sourced from Amazon.com. Last updated 2026-10-07. Price and availability subject to change.

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Seagate Exos 1.2TB 12Gb/s SAS10K 512n 128MB 2.5"
$145.00
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