Seagate ST3120814A 120GB ATA-100 IDE front view Seagate ST3120814A 120GB ATA-100 IDE front view
Seagate ST3120814A 120GB ATA-100 IDE front view Seagate ST3120814A 120GB ATA-100 IDE front view
Seagate ST3120814A top view Seagate ST3120814A top view
Seagate ST3120814A 120GB ATA-100 IDE front view
Seagate ST3120814A 120GB ATA-100 IDE front view
Seagate ST3120814A top view

Seagate

Seagate ST3120814A – 120GB | ATA-100 IDE PATA | 7200RPM | 3.5" | Legacy HDD

$129.95

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

The ST3120814A is a 120GB ATA-100 IDE hard drive featuring 7200RPM, 8MB cache, and 8.5ms average seek time in a 3.5" form factor. Built for mid-2000s desktop systems, it is ideal for legacy computer restoration, vintage gaming builds, and IDE-based embedded systems. Compatible with Windows XP, Windows 2000, and older operating systems requiring ATA/IDE controllers. This Barracuda 7200.9 series drive utilized longitudinal magnetic recording technology and achieved 0.34% annualized failure rate during continuous desktop operation.

All products from Anand International ship brand new and factory sealed. Volume and B2B pricing available for qualified buyers.
Specifications
  • Manufacturer: Seagate
  • Model: ST3120814A
  • Capacity: 120GB
  • Interface: ATA-100 IDE PATA
  • Spindle Speed: 7200RPM
  • Cache: 8MB
  • Form Factor: 3.5"
  • Seek Time: 8.5ms average
  • Latency: 4.16ms
  • MTBF: 600,000 hours
  • Drive Type: Desktop HDD
  • Warranty: 90 days
  • Shipping: Free domestic US shipping
  • Condition: Brand New, Factory Sealed
Product Features
  • 120GB formatted capacity with ATA-100 interface for demanding storage workloads
  • 7200RPM spindle speed for faster data access
  • 8MB cache buffer with multi-segmented architecture
  • Giant Magnetoresistive (GMR) recording heads
  • Ultra DMA mode 5 support up to 100MB/s transfer rate
  • Standard 3.5" form factor with 40-pin IDE connector
  • Master/slave jumper configuration support
  • S.M.A.R.T. monitoring and diagnostics capability
  • Direct replacement for legacy systems requiring IDE/ATA 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 systems supporting IDE/ATA controllers including Windows XP, Windows 2000, DOS, and legacy Linux distributions. Not compatible with SATA-based systems or modern motherboards without IDE controllers.
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.

120GB ATA-100 7200RPM 8MB Cache Factory Sealed

Why the ST3120814A — Legacy IDE Still Available New HDD

The Barracuda 7200.9 series represented Seagate's mainstream desktop drive generation from 2004-2005, featuring proven longitudinal recording technology. This 120GB model delivers reliable 7200RPM performance with 8MB cache for enhanced read/write operations. As the final generation before perpendicular recording, it offers excellent compatibility with legacy systems while maintaining proven reliability metrics.

Proven 7200RPM Performance

7200RPM spindle speed delivers 4.16ms latency and 8.5ms average seek time for responsive desktop computing performance.

ATA-100 IDE Compatibility

Standard 40-pin IDE interface with Ultra DMA mode 5 support provides seamless integration with legacy desktop systems and motherboards.

Enhanced 8MB Cache Buffer

Multi-segmented 8MB cache with read-ahead and write-caching algorithms optimizes data throughput for desktop applications.

GMR Recording Technology

Giant Magnetoresistive heads with EPRML encoding deliver reliable data recording and extended operational lifespan in desktop environments.

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 IDE, including information on usage, configuration, and compatibility.

1. What is an IDE hard drive?

An IDE (Integrated Drive Electronics) hard drive is a legacy type of storage device that connects to a computer using a 40-pin ribbon cable and Molex power connector. It was widely used before SATA drives became standard.
2. Can IDE hard drives be used in modern computers?

Most modern PCs do not have IDE ports. However, you can still use an IDE hard drive with a compatible IDE controller card or an IDE-to-SATA/USB adapter.
3. What devices are IDE hard drives compatible with?

IDE hard drives are commonly used in older desktops, servers, DVR systems, legacy industrial equipment, and other electronics that require ATA/100 or ATA/133 interfaces.
4. Are IDE and PATA the same thing?

Yes. IDE is also known as PATA (Parallel ATA). Both terms refer to the same interface standard, which uses wide ribbon cables to connect drives.
5. How do I know if my system supports an IDE hard drive?

Check if your motherboard has a 40-pin IDE connector. If not, you can use an adapter or external enclosure that converts IDE to SATA or USB.
6. What is the maximum capacity of an IDE hard drive?

Most IDE hard drives range from a few hundred megabytes to 500GB, though practical support depends on your system’s BIOS limitations.
7. Can IDE hard drives be used for external storage?

Yes. By using an IDE-to-USB adapter or external IDE enclosure, you can repurpose an IDE hard drive as an external storage device.