Western Digital Corp. AC420400 hard drive specifications

Western Digital Caviar 20.4 GB DMA/ATA-66 (Ultra) 3.5" x 1/3H in

The award-winning WD Caviar family provides the best combination of performance, reliability and value for today's entry-level and mainstream desktop systems. WD Caviar Enhanced IDE (EIDE) hard drives offer Ultra ATA/66, 5400 RPM spindle speeds, low seek times, high capacity, a 512 or 2048 KB cache buffer, and up to 66.6 MB/s data transfer rates, all of which adds up to a fast data delivery system.

Recommended software for Western Digital Corp. AC420400 status and S.M.A.R.T. monitoring is ActiveSMART www.ariolic.com


Manufacturer
Western Digital Corp.

HDD Part Number
AC420400


Hard drive health monitoring software
ActiveSMART by Ariolic Software. Click to download ActiveSMART

General

Device Type
Hard drive - Internal hard drive

Width
4 in

Depth
5.7 in

Height
1 in

Weight
1.1 lbs

Hard Drive

Form Factor

Capacity
20.4 GB

Interface Type
ATA-66

Buffer Size
2 MB

Bytes per Sector
512

Performance

Drive Transfer Rate
66.6 MBps

Internal Data Rate
24.5 MBps

Seek Time
9 ms (average)

Track-to-Track Seek Time
2.2 ms

Average Latency
5.6 ms

Spindle Speed
5400 rpm

Reliability

Mean time before failure
750,000 hour(s)

Storage Hard Drive / Non-Recoverable Errors
1 per 10^13

Start / Stop Cycles
40,000

Storage Controller

Type
None

Expansion / Connectivity

Connections
1 x Storage - ATA-66 - 40 pin IDC

Compatible Bays
1 x Internal - 3.5" x 1/3H

Miscellaneous

Cables Included
None

Power

Power Device
None

Software / System Requirements

Software Included
None

OS Required
None

Manufacturer Warranty

Service & Support
1 year warranty

Service & Support Details
Limited warranty - Parts and labor - 1 year - Bring-in

Environmental Parameters

Min Operating Temperature
41 �F

Max Operating Temperature
131 �F

Humidity Range Operating
8 - 90%

Vibration Tolerance
0.5 g @ 5-300 Hz (operating) / 2 g @ 5-500 Hz (non-operating)

Sound Emission
35 dBA

Max Altitude Operating
9840 ft


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