Quantum RR420A 420MB ATA-2 IDE front view Quantum RR420A 420MB ATA-2 IDE front view
Quantum RR420A 420MB ATA-2 IDE front view Quantum RR420A 420MB ATA-2 IDE front view
Quantum RR420A top view Quantum RR420A top view
Quantum RR420A angled view Quantum RR420A angled view
Quantum RR420A 420MB ATA-2 IDE front view
Quantum RR420A 420MB ATA-2 IDE front view
Quantum RR420A top view
Quantum RR420A angled view

Quantum

Quantum RR420A – 420MB | ATA-2 IDE 40-Pin | 3600RPM | 3.5" | Legacy HDD

$99.95

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

The Quantum RR420A is a 420MB ATA-2 IDE hard drive featuring 3600RPM spindle speed, 128KB cache, 15ms average seek time in a 3.5" form factor. Built for mid-1990s desktop and workstation systems, it is ideal for legacy PC restoration, DOS/Windows 95 builds, and vintage computing projects. Compatible with 40-pin IDE controllers and systems supporting ATA-2 specification. Features advanced track and cylinder skewing technology for optimized sequential data throughput and minimized latency during head switching operations.

All products from Anand International ship brand new and factory sealed. Volume and B2B pricing available for qualified buyers.
Specifications
  • Manufacturer: Quantum
  • Model: RR420A
  • Capacity: 420MB
  • Interface: ATA-2 IDE 40-Pin
  • Spindle Speed: 3600RPM
  • Cache: 128KB
  • Form Factor: 3.5"
  • Seek Time: 15ms Average
  • Latency: 8.33ms Rotational
  • MTBF: 300,000 hours
  • Drive Type: Internal IDE HDD
  • Warranty: 90 days
  • Shipping: Free domestic US shipping
  • Condition: Brand New, Factory Sealed
Product Features
  • ATA-2 IDE interface with embedded controller
  • 128KB cache buffer with look-ahead technology
  • Track and cylinder skewing for optimized throughput
  • RLL 1/7 encoding for data density
  • 96-bit Reed-Solomon ECC error correction
  • Automatic defect management system
  • Low power consumption (3.3W idle, 6.7W seek)
  • Master/slave jumper configuration support
  • 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 386, 486, Pentium systems with 40-pin IDE controllers, DOS, Windows 3.1/95, and vintage workstations supporting ATA-2 specification. Not compatible with modern SATA systems or drives requiring 28-bit LBA addressing beyond 137GB.
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.

420MB ATA-2 IDE 3600RPM 15ms Seek Factory Sealed

Why the RR420A is the right Legacy HDD

The Quantum ProDrive RR420A represents mid-1990s IDE technology at its peak, delivering reliable 420MB storage for period-appropriate computing. With its ATA-2 interface and optimized firmware, it provides authentic performance for legacy system restoration. The drive's track skewing technology and Reed-Solomon ECC ensure data integrity for vintage computing applications.

Authentic Mid-90s Performance

Features period-correct ATA-2 IDE interface with 3600RPM performance optimized for DOS and early Windows systems. Delivers the exact storage experience vintage computing enthusiasts demand.

Advanced Error Correction

96-bit Reed-Solomon ECC with automatic defect management ensures data reliability. Internal error recovery operations remain transparent to legacy operating systems.

Optimized Data Throughput

Track and cylinder skewing technology minimizes latency during head switching and single-cylinder seeks. Maximizes sequential data performance for period applications.

Legacy System Compatibility

Perfect capacity for DOS/Windows 95 installations without partition limitations. Supports master/slave configurations with proper jumper settings for dual-drive systems.

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.