Seagate ST9500423AS 500GB SATA front view Seagate ST9500423AS 500GB SATA front view
Seagate ST9500423AS 500GB SATA front view Seagate ST9500423AS 500GB SATA front view
Seagate ST9500423AS top view Seagate ST9500423AS top view
Seagate ST9500423AS angled view Seagate ST9500423AS angled view
Seagate ST9500423AS label view Seagate ST9500423AS label view
Seagate ST9500423AS label view Seagate ST9500423AS label view
Seagate ST9500423AS 500GB SATA front view
Seagate ST9500423AS 500GB SATA front view
Seagate ST9500423AS top view
Seagate ST9500423AS angled view
Seagate ST9500423AS label view
Seagate ST9500423AS label view

Seagate

Seagate ST9500423AS – 500GB | SATA 3Gb/s | 7200RPM | 2.5" | Laptop HDD

$59.95

Brand New, Factory Sealed | In Stock | Bulk Orders Available

The ST9500423AS is a 500GB SATA 3Gb/s hard drive featuring 7200RPM, 16MB cache, and 11ms average seek time in a 2.5" form factor. Built for late 2000s and early 2010s laptop systems, it is ideal for notebook upgrades, external storage enclosures, and portable computing applications. Compatible with SATA-II controllers, laptop motherboards, and external USB/SATA enclosures. Part of Seagate's Momentus 7200.4 series engineered for continuous mobile operation with shock resistance up to 1000G and optimized power management for extended battery life.

All products from Anand International ship brand new and factory sealed. Volume and B2B pricing available for qualified buyers.
Specifications
  • Manufacturer: Seagate
  • Model: ST9500423AS
  • Capacity: 500GB
  • Interface: SATA 3Gb/s
  • Spindle Speed: 7200 RPM
  • Cache: 16MB
  • Form Factor: 2.5"
  • Seek Time: 11ms average
  • Latency: 4.17ms
  • MTBF: 600,000 hours
  • Drive Type: Internal
  • Warranty: 90 days
  • Shipping: Free domestic US shipping
  • Condition: Brand New, Factory Sealed
Product Features
  • SATA 3Gb/s interface for fast data transfer
  • 7200 RPM spindle speed for enhanced performance
  • 16MB cache buffer for improved responsiveness
  • 2.5" laptop form factor
  • 9.5mm height profile
  • Track-to-track seek time: 1.5ms
  • G-Force Protection technology
  • Low power consumption design
  • Direct replacement for legacy systems requiring SATA connectivity
  • 90-day Anand International warranty on all legacy stock
  • Free domestic US shipping included
  • Volume and B2B pricing available for qualified buyers
Compatibility

Compatible with SATA-II and SATA-III controllers, laptop motherboards, external USB/SATA enclosures, and legacy notebook systems. Not compatible with IDE/PATA interfaces or systems requiring 3.5" drives.
Shipping & Returns
  • Free Shipping: We currently offer free Economy Shipping within the continental U.S. with no minimum order required. Expedited shipping is available at standard carrier rates.
  • Same-Day Shipping: Order placed before 2PM PST will ship the same day. Orders received after this time will ship the following business day.
  • Hassle-Free Returns: If you're not completely satisfied with your purchase, simply return it within 10 days for a hassle-free refund or exchange.

500GB SATA 3Gb/s 7200RPM 16MB Cache Factory Sealed

Why the ST9500423AS is the right laptop hard drive

The Seagate ST9500423AS represents the Momentus 7200.4 generation of laptop hard drives, delivering desktop-class 7200RPM performance in a mobile 2.5" form factor. With 500GB capacity and 16MB cache, it provides the ideal balance of storage space and speed for demanding notebook applications. This drive was engineered during the peak of mechanical laptop drive development, featuring advanced power management and shock protection technologies that made it a preferred choice for premium laptops of its era.

High-Performance 7200 RPM Speed

Delivers 50% faster performance than 5400 RPM drives while maintaining laptop-appropriate power consumption. Ideal for users requiring desktop-class responsiveness in portable systems.

Robust 16MB Cache Buffer

Large cache buffer improves multitasking performance and reduces seek times for frequently accessed data. Enhances overall system responsiveness during intensive operations.

Mobile-Optimized Engineering

Features G-Force Protection and shock resistance up to 1000G for reliable operation in portable environments. Advanced power management extends battery life compared to earlier 7200 RPM drives.

Universal SATA Compatibility

SATA 3Gb/s interface ensures broad compatibility with legacy and modern laptop systems. Works with external enclosures for versatile storage deployment options.

New Old Stock with 90-Day Warranty

Available as brand new, factory sealed old stock units from Anand International with a 90-day warranty. Ideal for legacy system maintenance, vintage computing restoration, and hard-to-find replacement needs.

Frequently Asked Questions

Frequently asked questions for SATA, including information on usage, configuration, and compatibility.

1. What is a SATA hard drive used for?

A SATA (Serial ATA) hard drive is used in desktops, laptops, servers, and NAS systems for data storage. It’s the most common hard drive type, offering a balance of speed, affordability, and wide compatibility.
2. What’s the difference between SATA I, II, and III?

The difference is speed. SATA I supports up to 1.5 Gb/s (150 MB/s), SATA II up to 3 Gb/s (300 MB/s), and SATA III up to 6 Gb/s (600 MB/s). Most modern drives use SATA III but remain backward compatible with older versions.
3. Are SATA hard drives compatible with older systems?

Yes. SATA drives are backward compatible, meaning a SATA III drive can work on a SATA II or I port, though performance will be limited to the slower speed of the system.
4. What’s the maximum capacity of a SATA hard drive?

SATA hard drives come in a wide range of capacities, from 500GB to over 20TB. This makes them suitable for everything from basic desktop use to large-scale data storage and backup.
5. Can I use a SATA hard drive in RAID or NAS systems?

Yes. SATA drives support RAID configurations and can be used in NAS systems. For higher reliability, enterprise-grade SATA models such as NAS, surveillance, or data-center drives are recommended.
6. What is the difference between a 2.5" and a 3.5" SATA hard drive?

2.5" SATA drives are smaller and commonly used in laptops or compact systems, while 3.5" SATA drives are larger and primarily used in desktops, servers, and NAS devices.
7. How do SATA hard drives compare to SSDs?

Both use the SATA interface, but HDDs store data on spinning disks while SSDs use flash memory. SSDs are much faster, but SATA HDDs remain more affordable for high-capacity storage.