Seagate Momentus Thin HDD - 320GB 5400RPM SATA II 3Gb/s 16MB Cache 2.5" 7mm Laptop Hard Drive - ST320LT020


The Seagate ST320LT020 has been Discontinued. Replacement option is the ST500LM030.

Warranty1 Year Warranty
AvailabilityIn Stock
ManufacturerSeagate Technology
SeriesSeagate Momentus Thin
UPC Code763649044223

Product Specs

Product Specs
Capacity320 GB
Spindle Speed5400 RPM Fluid Dynamic (FDB) Motor
Cache Buffer16 MB Intelligent Caching
Advanced FormatYes (logical 512e / physical 4096)
Form Factor2.5 Inch Internal Hard Drive
InterfaceSATA II 3Gb/sec (Generation 2)
Interface Speed3Gb/sec - Data Transfer Rate (max) Buffer to Host
Data Transfer Rateup to 138MB/sec Host to/from Drive (Sustained)
Interface ConnectorSATA (7-Pin Signal and 15-Pin Power Connector)
Recording TechnologyPerpendicular Magnetic Recording (PMR) Technology
Life Expectancy600,000 Hours MTTF (Mean Time To Failures)
Workload Rating< 55 TB/yr (Workload Rate Limit) / 600,000 (Load/Unload Cycles)
Shock ResistanceOperating: 350Gs (2ms) / Non Operating: 1000Gs (1ms)
Rohs CompliantYes
Dimensions(L x W x H) 100.55mm x 70.10mm x 7.0mm
Part Number9YG142
ClassificationMainstream Drives

Key Features

  • Capacities up to 500GB
  • 5400 RPM Rotational Speed Motor
  • Low Power Consumption
  • SATA II 3Gb/s Interface
  • Advanced Format, 4K Sector Size
  • 512 byte Emulation (512e)
  • Read Multiple and Write Multiple Command Support
  • Whisper Quiet with Fluid Dynamic Bearing (FDB) Motors
  • Native Command Queuing (NCQ) Technology
  • Full-track Multiple-Sector Transfer Capability
  • State-of-the-Art Cache and On-the-Fly Error-Correction Algorithms
  • Staggered Spin-up Technology
  • NoiseGuards Technology
  • SilentSeek Technology
  • Perpendicular Magnetic Recording (PMR) Technology
  • QuietStep Ramp Load Technology
  • Seagate SmartAlign Technology

Seagate Momentus Thin Hard Drives

Seagate Momentus Thin 2.5" Hard Drives are a series of high-performance, reliable and energy-efficient hard disk drives designed for laptops, ultrabooks, and other mobile computing devices. They are available in various capacities ranging from 160GB to 500GB and operate at a speed of 5400 or 7200 RPM. The drives use SATA II (3Gb/s) interface for fast data transfer and have a cache size of 16MB or 32MB, depending on the model. They are also built with advanced features such as Seagate SmartAlign technology, which simplifies the installation process and eliminates the need for advanced formatting tools. In terms of physical design, the Momentus Thin drives are ultra-slim with a height of only 7mm, making them an ideal choice for thin and light laptops. They are also shock-resistant and have a low power consumption, which makes them suitable for mobile computing environments. The Seagate Momentus Thin hard drive also features built-in hardware-based encryption using the Advanced Encryption Standard (AES) 256-bit algorithm. The encryption is automatic and transparent, requiring no user intervention to encrypt or decrypt data. In addition to its standard encryption features, the Seagate Momentus Thin hard drive is also certified to comply with the Federal Information Processing Standards (FIPS) 140-2 level 2. This is a US government standard that specifies the security requirements for cryptographic modules used in information systems. FIPS 140-2 level 2 certification ensures that the hard drive meets stringent security requirements, including physical tamper resistance, key management, and other security features. The Seagate Momentus Thin hard drive also features other security features, such as Instant Secure Erase (ISE), which allows for quick and secure deletion of all data on the drive.

   Key Advantages

  • 7mm z-height form factor enables thin chassis design for all segments of laptop computing.
  • Seagate SmartAlign technology provides a transition to 4K sectors without the need for software utilities.
  • Self-Encrypting Drives mitigate data breaches, comply with data protection regulations and preserve brand recognition.
  • Self-Encrypting Drives with FIPS 140-2 certification are approved for the U.S. and Canadian governments.

   Best-Fit Applications

  • Entry-Level to High-Performance Laptops—Enjoy a stylish, thin and lightweight design without exceeding your budget.
  • Netbooks—Get a thinner netbook without compromising on storage or affordability.
  • Ultraportables—Take advantage of a stylish, thin and lightweight design without compromising on features.
  • Slim consumer electronics devices—Add some style to your digital life.
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