Western Digital Corp. WD4000YR hard drive specifications

Western Digital Caviar RE2 400GB Hard Drive

With 1.2 million hours MTBF, server duty cycle, next-generation SATA technology and state-of-the-art vibration tolerance, WD RE2 7200 RPM drives offer the best combination of reliability, high capacity and performance for enterprise applications. RAID-specific time-limited error recovery (TLER) - this feature, unique to WD, prevents drive fallout caused by the extended hard drive error-recovery processes common to desktop drives. Rotary Acceleration Feed Forward (RAFF) - optimizes operation and performance when the drives are used in vibration-prone multi-drive systems such as rack-mounted servers and network storage. 1.2 million hours MTBF, 24x7 100% duty cycle - the highest available reliability rating on high capacity drives.

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Manufacturer
Western Digital Corp.

HDD Part Number
WD4000YR


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
5.8 in

Height
1 in

Weight
1.3 lbs

Hard Drive

Form Factor

Capacity
400 GB

Interface Type
Serial ATA-150

Buffer Size
16 MB

Features
Native Command Queuing (NCQ), Time-Limited Error Recovery (TLER), SecureConnect, FlexPower, Rotary Acceleration Feed Forward (RAFF)

Performance

Drive Transfer Rate
150 MBps

Internal Data Rate
65 MBps

Seek Time
8.7 ms (average) / 21 ms (max)

Track-to-Track Seek Time
0.9 ms

Average Latency
4.2 ms

Spindle Speed
7200 rpm

Reliability

Mean time before failure
1,200,000 hour(s)

Storage Hard Drive / Non-Recoverable Errors
1 per 10^15

Start / Stop Cycles
50,000

Expansion / Connectivity

Interfaces
1 x Serial ATA-150 - 7 pin Serial ATA

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

Miscellaneous

Microsoft Certifications
Works with Windows Vista

Manufacturer Warranty

Service & Support
5 years warranty

Service & Support Details
Limited warranty - Parts and labor - 5 years - Bring-in

Environmental Parameters

Humidity Range Operating
5 - 95%

Vibration Tolerance
0.75 g @ 20-300 Hz (operating) / 4 g @ 20-500 Hz (non-operating)

Sound Emission
29 dBA


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