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WD RE2 WD5001ABYS 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5-inch Hard Drive.

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Product Description

SATA Hard Drives

500 GB, 1.2 million hours MTBF, 16 MB Cache, 7200 RPM

Huge capacity loaded with enterprise-class reliability and performance.

Loaded with performance and reliability features, these drives are the perfect solution for servers, video surveillance, and other demanding write-intensive applications.


WD RE2 Overview

With 1.2 million hours MTBF, 3 Gb/s SATA technology, and enhanced vibration tolerance, WD RE2 drives offer an ideal combination of reliability, high capacity, and optimum performance for enterprise applications.

Key Features
  • Superior reliability - Designed and manufactured to provide server-class reliability in high duty cycle environments. With 1.2 million hours MTBF, these drives have the highest available reliability rating on a high-capacity drive.
  • High capacity - Up to 750 GB of storage packed with server-class features and low cost-per-gigabyte value.
  • Fast - With 3 Gb/s data transfer rate, native command queuing (NCQ), and 16 MB cache, these drives deliver optimum performance.
  • Low power - Active Power Save delivers best-in-class seek mode power consumption through an advanced WD firmware which conserves power in active seek modes without degrading performance.
  • RAID-specific, time-limited error recovery (TLER) - Significantly reduces drive fallout caused by the extended hard drive error-recovery processes common to desktop drives.
  • Rotary Acceleration Feed Forward (RAFF) - Provides enhanced vibration tolerance by optimizing operation and performance when the drives are used in vibration-prone, multi-drive systems such as rack-mounted servers or network storage.
  • Perpendicular Magnetic Recording (PMR) - WD RE2 drives employ PMR technology to achieve even greater areal density.

Frequently Asked Questions

Q: Regular 7200 RPM desktop drives run fine in RAID environments; why do I need these drives?
A: Unlike regular desktop drives, WD RE2 hard drives are engineered and manufactured to enterprise-class standards and include features such as time-limited error recovery, Active Power Save, and RAFF that make them an ideal solution for RAID.
Q: What is time-limited error recovery and why do I need it?
A: Desktop drives are designed to protect and recover data, at times pausing for as much as a few minutes to make sure that data is recovered. Inside a RAID system, where the RAID controller handles error recovery, the drive needn't pause for extended periods to recover data. In fact, heroic error recovery attempts can cause a RAID system to drop a drive out of the array. WD RE2 is engineered to prevent hard drive error recovery fallout by limiting the drive's error recovery time. With error recovery factory set to seven seconds, the drive has time to attempt a recovery, allow the RAID controller to log the error, and still stay online.
Q: Don't I need SCSI data integrity For RAID environments?
A: These drives include 32-bit CRC error checking for all bits transmitted: command, data, and status and error checking to compare the data read back from the hard drive to the data originally written to the hard drive.


Ideal For

Servers, SAN/NAS, scientific computing, life sciences, video surveillance, enterprise backup, document/image management, audio/video media applications, and other demanding write-intensive applications.

Performance Specifications
Rotational Speed 7,200 RPM (nominal)
Buffer Size 16 MB
Average Latency 4.20 ms (nominal)
Load/unload Cycles 50,000 minimum
Seek Times
Read Seek Time 8.9 ms
Write Seek Time 8.9 ms (average)
Track-To-Track Seek Time 0.6 ms (average)
Full Stroke Seek 21.0 ms (average)
Transfer Rates
Buffer To Host (Serial ATA) 3 Gb/s (Max)
Physical Specifications
Formatted Capacity 500,107 MB
Capacity 500 GB
Interface SATA 3 Gb/s
User Sectors Per Drive 976,773,168
Physical Dimensions
Height 1.028 Inches
Depth 5.787 Inches
Width 4.00 Inches
Weight 1.61 Pounds
Height 25.4 mm
Depth 147 mm
Width 101.6 mm
Weight 0.73 kg
Environmental Specifications
Operating Shock (Read) 65G, 2 ms
Non-operating Shock 250G, 2 ms
Idle Mode 28 dBA (average)
Seek Mode 0 33 dBA (average)
Seek Mode 3 29 dBA (average)
Temperature (English)
Operating 41 F to 131 F
Non-operating -40 F to 149 F
Temperature (Metric)
Operating 5 C to 55 C
Non-operating -40 C to 65 C
Operating 5-95% RH non-condensing
Non-operating 5-95% RH non-condensing
Altitude (English)
Operating -1,000 feet to 10,000 feet
Non-operating -1,000 feet to 40,000 feet
Altitude (Metric)
Operating -305M to 3,050M
Non-operating -305M to 12,200M
Linear 20-300 Hz, .75G (0 to peak)
Random 10-300 Hz, 0.004 g / Hz
Low Frequency 5-20 Hz, 0.195 inches (double amplitude)
High Frequency 20-500 Hz, 4.0G (0 to peak)
Electrical Specifications
Current Requirements
12 VDC
Read/Write 450 mA
Idle 430 mA
Standby 20 mA
Sleep 20 mA
Read/Write 800 mA
Idle 730 mA
Standby 270 mA
Sleep 250 mA
Power Dissipation
Read/Write 9.50 Watts
Idle 8.75 Watts
Standby 1.60 Watts
Sleep 1.50 Watts
As used for storage capacity, one megabyte (MB) = one million bytes, one gigabyte (GB) = one billion bytes, and one terabyte (TB) = one trillion bytes. Total accessible capacity varies depending on operating environment. As used for buffer or cache, one megabyte (MB) = 1,048,576 bytes. As used for transfer rate or interface, megabyte per second (MB/s) = one million bytes per second, megabit per second (Mb/s) = one million bits per second, and gigabit per second (Gb/s) = one billion bits per second.

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