Conner CFS420A 420MB ATA IDE front view Conner CFS420A 420MB ATA IDE front view
Conner CFS420A 420MB ATA IDE front view Conner CFS420A 420MB ATA IDE front view
Conner CFS420A top view Conner CFS420A top view
Conner CFS420A angled view Conner CFS420A angled view
Conner CFS420A 420MB ATA IDE front view
Conner CFS420A 420MB ATA IDE front view
Conner CFS420A top view
Conner CFS420A angled view

Conner

Conner CFS420A – 420MB ATA IDE | 3600 RPM | 3.5" | Desktop HDD

$99.95

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

The CFS420A is a 420MB ATA IDE hard drive featuring 3600 RPM spindle speed, 32KB read-ahead cache, and 14ms average seek time in a 3.5" slimline form factor. Built for early 1990s IBM PC/AT compatible systems, it is ideal for legacy computing restoration, vintage PC builds, and industrial control systems requiring period-appropriate storage. Compatible with any AT-style motherboard with IDE controllers, including systems with ISA slots and early PCI implementations. This Filepro series drive employs brushless DC motor technology with automatic head parking and supports universal translate mode for flexible cylinder/head/sector configuration.

All products from Anand International ship brand new and factory sealed. Volume and B2B pricing available for qualified buyers.
Specifications
  • Manufacturer: Conner
  • Model: CFS420A
  • Capacity: 420MB
  • Interface: ATA IDE
  • Spindle Speed: 3600 RPM
  • Cache: 32KB Read-Ahead
  • Form Factor: 3.5" Slimline
  • Seek Time: 14.0ms average
  • Latency: 8.33ms
  • MTBF: 250,000 hours
  • Drive Type: Desktop HDD
  • Warranty: 90 days
  • Shipping: Free domestic US shipping
  • Condition: Brand New, Factory Sealed
Product Features
  • ATA IDE interface with 40-pin connector
  • 32KB read-ahead cache buffer
  • Universal translate mode support
  • Voice coil actuator positioning
  • Automatic head parking system
  • ECC on-the-fly error correction
  • Low profile slimline design
  • Master/slave 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 IBM PC/AT and compatible systems, ISA-based motherboards, early PCI systems with IDE controllers, and industrial control systems requiring legacy storage. Not compatible with SATA controllers, modern UEFI systems without legacy IDE support, or systems requiring drives larger than 504MB without LBA translation.
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 IDE 3600 RPM 14ms Factory Sealed

Why the CFS420A — Legacy IDE Still Available New drive

Part of Conner's Filepro series from 1993, this drive represents the transition era from MFM/RLL to IDE interfaces. With its 420MB capacity and ATA compatibility, it provides authentic period storage for vintage computing projects. The universal translate mode and master/slave support make it ideal for dual-drive configurations common in early 1990s systems.

Period-Correct IDE Storage

Authentic early 1990s ATA IDE interface provides the exact storage technology used in original IBM PC/AT compatible systems of the era.

Universal Translate Mode

Flexible cylinder/head/sector configuration allows compatibility with various BIOS implementations and system requirements through software translation.

Proven Filepro Reliability

250,000-hour MTBF rating with voice coil actuator and automatic head parking ensures dependable operation in industrial and legacy applications.

Master/Slave Configuration

Full master/slave support with configurable jumpers enables dual-drive setups common in vintage system upgrades and data transfer scenarios.

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.