Western Digital Corporation (Products) Drives - New Hard Drive Products

Introducing...

The WD Caviar® 6.4 GB
EIDE Hard Drive

The Latest Generation of High-Performance WD Caviar Hard Drives

Western Digital's WD Caviar AC36400 hard drive sets new standards for storage, performance, and reliability. With a storage capacity of 6.4 gigabytes, this workhorse WD Caviar drive is engineered to handle today's most storage-intensive desktop, workstation, multi-media, and internet applications.

Features

MR Head Technology - Magnetoresistive heads provide separate read and write elements, allowing optimization of the two functions for increased areal density and improved performance of the hard drive.

Ultra DMA/33 High-Speed Host Transfers - Doubles the current transfer rate under local bus environments.
CacheFlow5^{^TM} - Increases performance by adapting read and write operations on-the-fly and works in conjucntion with the advanced disk caching capabilities of today's major operating systems.
S.M.A.R.T. - Assists the user in preventing possible system down time by warning users of the impending risk of data loss.
Low Power Consumption - Saves energy, money, and the environment.
Exceptional Quality - Guaranteed compatibility and automatic defect management allows easy installation. A three-year warranty and 350,000 MTBF means years of trouble-free operation.
Total of Twenty New Features - This latest generation WD Caviar hard drive includes twenty new robust features, including firmware enhancements, that were specifically designed for the MR head implementation and its quality processes.

Using the industry-recognized 3.5-inch, low-profile WD Caviar design, the AC36400 drive incorporates leading-edge magnetoresistive head technology to meet increasing capacity requirements. Read and write elements in the MR head are separate in order to optimize read and write capabilities. The read element, composed of a thin-film material whose resistance changes in the presence of a magnetic field, produces a strong signal, allowing significant increases in areal densities.

The AC36400 drive supports Mode 4 PIO, Mode 2 DMA and Ultra DMA/33. Ultra DMA/33 is a high-speed host data transfer feature that transfers data at 33.3 MB/s - double the current burst transfer rate. This results in maximum disk performance under PCI local bus environments.

Western Digital's award-winning WD Caviar hard drives are your best choice for powerful systems running Windows 95, Windows 3.1x, Windows NT, OS/2 Warp, Novell NetWare, or Unix operating systems on 486, Pentium, Pentium Pro, Pentium II, PowerPC, or RISC-based processors.

Western Digital's rugged and reliable WD Caviar hard drives are designed and manufactured to the highest standards of quality and reliability. This commitment to quality is demonstrated by Western Digital's company-wide ISO 9001 certification. Before shipping, every WD Caviar drive undergoes over 200 rigorous tests to ensure its functionality and compatibility. So it's not surprising that they have also set new standards for reliability, are rated at 350,000 hours Mean Time Between Failure - and are backed by Western Digital's comprehensive three-year warranty.

WD Caviar 6.4 GB Hard Drive Specifications

MODEL	AC36400
Formatted Capacity^¹ (MB)	6448.6
Interface	40-pin EIDE
Average Read Seek ^⁴ (ms)	9.5
Rotational Speed (rpm)	5400
Buffer Size (KB)	256
Data Transfer Rate Buffer to Host	16.6 MB/s (Mode 4 PIO) ^² 16.6 MB/s (Mode 2 DMA) ^³ 33.3 MB/s (Mode 2 Ultra DMA)
Buffer to Disk	131 Mbits/s max.
Shock (Non-operating)	150G
Setup Parameters Cylinders Heads Sectors	13328 15 63
Typical Power - Dissipation (read/write)	5.35W
MTBF (hours)	350,000
Warranty (years)	3
Dimensions - Height - Length - Width - Weight	1.0 inch (25.4 mm) 5.75 Inches (146.05 mm) 4.0 inches (101.6 mm) 1.1 pound (.482 kg)
1. Western Digital defines a megabyte (MB) as 1,000,000 bytes, and a gigabyte (GB) as 1,000,000,000 bytes. 2. Maximum PIO burst rate is specified at 16.6 MB/s using the IORDY signal. 3. Maximum multi-word DMA burst rate is specified using the DMARQ and DMACK signals. 4. Average Read Seek Time is determined by dividing the total time required to seek between all possible ordered pairs of track addresses by the total number of these ordered pairs at nominal environmental conditions.

Click here for more information on the WD Caviar hard drive family.

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