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Seagate Momentus Thin ST320LT012 320 GB 2.5" Internal Hard Drive - 1 Pack
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Product Information for Seagate Momentus Thin ST320LT012 320 GB 2.5" Internal Hard Drive - 1 Pack

Highlights for Seagate Momentus Thin ST320LT012 320 GB 2.5" Internal Hard Drive - 1 Pack

  • Storage Capacity:320 GB
  • Rotational Speed:5400 rpm

Marketing Information

Seagate integrators and OEM customers are faced with an increasing demand for thinner yet fully functional mainstream laptop computing solutions. Until recently, the only option for these thinner solutions revolved around high-priced, slow performing 1.8-inch drives and high-priced, fast solid state drives. Because both storage types were costly options, system designers had no choice but to build thinner chassis only for their high-end lines. Enter Seagate ingenuity.

Built-in Devices


  • Drive Interface: SATA/300
  • SATA Pin: 7-pin
  • Drive Performance

  • Buffer: 8 MB
  • Rotational Speed: 5400 rpm
  • Maximum External Data Transfer Rate: 384 MBps (3 Gbps)
  • General Information

  • Product Type: Hard Drive
  • Manufacturer Part Number: ST320LT012
  • Manufacturer Website Address: www.seagate.com
  • Packaged Quantity: 1
  • Manufacturer: Seagate Technology
  • Product Model: ST320LT012
  • Product Name: Momentus Thin ST320LT012 Hard Drive
  • Product Line: Momentus Thin
  • Brand Name: Seagate
  • Miscellaneous

    Certifications & Standards

    • D33027
    • CE
    • TUV
    • C-Tick
    • E190397

    System Requirements

    Operating System(s):

    • Windows XP SP1 or newer
    • Windows Server 2003
    • Windows Vista RTM + Hotfix KB950096
    • Windows Vista SP1 + Hotfix KB943170
    • Windows Vista SP2 + Hotfix KB977323
    • Windows Server 2008 + Hotfix KB976323
    • Windows 7 + Hotfix KB976418

    Green Compliant


    Green Compliance Certificate/Authority


    Network & Communication

    Physical Characteristics

  • Weight (Approximate): 3.25 oz
  • Form Factor: Internal
  • Height: 0.3"
  • Width: 2.8"
  • Depth: 4.0"
  • Drive Width: 2.5"
  • Power Description

    Management & Protocols


    Technical Information

  • Storage Capacity: 320 GB
  • Platform Supported: PC
  • Features: Self-encrypting Drive
  • Warranty

    Learn More About Seagate Momentus Thin ST320LT012 320 GB 2.5" Internal Hard Drive - 1 Pack

    Thank You Is the information in this section helpful? Yes / No


    • Momentus Thin 5400.9 SATA Hard Drive 320GB

      2.5-inch SATA Hard Drive with Laptop Encryption
      Feature-rich, slim, lightweight style at price and capacity points that enable no-compromise designs for thin computing.
      • Available as a Self-Encrypting Drive (SED) and FIPS 140-2 SED1
      • Compatible with SATA 6Gb/s and 3Gb/s designs
      • Backed by a 2-year limited warranty


    • 2.5-inch Laptop Drives Available in Several Capacities

      Seagate's purpose-built the 2.5-inch Laptop HDDs help meet our customers’ demand for affordable, flexible computing solutions. 
      • 7mm hard drive is available in 500GB, 320GB and 250GB options
      • 9.5mm hard drive is available in 2TB, 1TB and 500GB options
      • 15mm hard drive is available in 4TB and 3TB options (for external hard drives and all-in-one or ultra-slim desktop drives).

    • Smooth Migration to Advanced Format 4K

      Laptop Thin HDDs include Seagate SmartAlign technology.2 This innovation helps you easily get all the benefits of the new Advanced Format (AF) 4K sector standard―no utilities, no extra steps―automatically in the background. Performance is not affected, and there is no need for time-consuming utilities required by other AF-enabled drives. 
    • Secure Laptop Encryption (SED) Options

      Laptop Thin HDDs can deliver government-grade encryption without performance degradation―protecting your data where it lives. You get all the benefits of secure data encryption without the headaches.
      • Ships with the Trusted Computing Group (TCG) Opal protocol
      • The world’s first 7mm SED to ship with FIPS 140-2 validation1
      • Instant on-the-fly encryption without performance degradation
      • Instant Secure EraseTM technology 3 that can instantly erase the security key data on your hard drive if needed, enabling secure disposal or repurposing of the SED


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    Areal Density705
    Average Operating Power1.2W
    Cache (MB)16MB
    Spindle Speed (RPM)5400
    Annualized Failure Rate (AFR)0.48%
    Operating (drive case, max)60°C
    Typical Weight95
    Maximum Operating Shock400Gs
    InterfaceSATA 6Gb/s


    1. 1 Self-Encrypting Drives and FIPS 140-2 Validated drives are not available in all models or countries.
    2. 2 Seagate SmartAlign technology may not be available on all models. Refer to the appropriate data sheet for further information.
    3. 3 ISO/IEC 27040 (Information technology―Security techniques―Storage security) and NIST 800-88 (Guidelines for Media Sanitization)
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