Service Manuals, User Guides, Schematic Diagrams or docs for : Western Digital WD RE4 II
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WD RE4
Enterprise SATA Hard Drives
Ideal for servers, video surveillance, and other demanding
write-intensive applications, WD RE4 7200 RPM Enterprise
SATA hard drives offer up to 2 TB capacity, 64 MB cache,
4th generation vibration tolerance and 5-year limited
warranty.
INTERFACE WIDTH/HEIGHT ROTATIONAL SPEED CAPACITIES
SATA 3 Gb/s 3.5-inch/1-inch 7200 RPM 250 GB to 2 TB
MODEL NUMBERS
Note: Not all products may be
WD2003FYYS WD1003FBYX WD2503ABYX available in all regions of the
WD1503FYYS WD5003ABYX world.
Product Benefits
Massive capacity Dual actuator technology Multi-axis shock sensor Thermal extended burn-in test
WD RE4 Enterprise SATA drives are A head positioning system with two Automatically detects the subtlest shock Each drive is put through extended burn-
available with up to 2 TB of cavernous actuators that improves positional events and compensates to protect the in testing with thermal cycling to ensure
capacity. accuracy over the data track(s). The data. reliable operation.
primary actuator provides coarse
Dual processor displacement using conventional RAID-specific, time-limited error Third generation dynamic fly
electromagnetic actuator principles. The
With double the processing power, secondary actuator uses piezoelectric recovery (TLER) height
WD RE4 boasts the highest performance motion to fine tune the head positioning Prevents drive fallout caused by the Each read-write head's fly height is
of any drive in the WD RE family. to a higher degree of accuracy. (2 TB extended hard drive error-recovery adjusted in real time for optimum
only) processes common to desktop drives. reliability.
RAFFTM
Enhanced RAFF technology includes StableTracTM NoTouchTM ramp load 24x7 reliability
sophisticated electronics to monitor the The motor shaft is secured at both ends technology With 1.2 million hours MTBF (tested at
drive and correct both linear and to reduce system-induced vibration and 100% duty cycle), these drives have the
rotational vibration in real time. The result stabilize platters for accurate tracking The recording head never touches the
disk media ensuring significantly less highest available reliability rating on a
is a significant performance improvement during read and write operations. high-capacity drive.
in high vibration environments over the wear to the recording head and media as
previous generation of drives. well as better drive protection in transit.
IntelliSeekTM
Calculates optimum seek speeds to lower
power consumption, noise, and vibration.
Applications
Ideal for servers, storage arrays, video surveillance, and other demanding applications.
WD RE4
Specifications 1
2 TB 1.5 TB 1 TB 500 GB 250 GB
Model number WD2003FYYS WD1503FYYS WD1003FBYX WD5003ABYX WD2503ABYX
Interface SATA 3 Gb/s SATA 3 Gb/s SATA 3 Gb/s SATA 3 Gb/s SATA 3 Gb/s
Formatted capacity 2 TB 1.5 TB 1 TB 500 GB 251 GB
User sectors per drive 3,907,029,168 2,930,277,168 1,953,525,168 976,773,168 490,350,672
Native command queuing Yes Yes Yes Yes Yes
SATA latching connector Yes Yes Yes Yes Yes
Form factor 3.5-inch 3.5-inch 3.5-inch 3.5-inch 3.5-inch
Performance
Data transfer rate (max)
Buffer to host 3 Gb/s 3 Gb/s 3 Gb/s 3 Gb/s 3 Gb/s
Host to/from drive (sustained) 138 MB/s 138 MB/s 128 MB/s 128 MB/s 128 MB/s
Cache (MB) 64 64 64 64 64
Rotational speed (RPM) 7200 7200 7200 7200 7200
Average drive ready time (sec) 21 21 18 14 14
Configuration/Organization
Heads/disks 8/4 6/3 4/2 2/1 1/1
Bytes per sector (STD) 512 512 512 512 512
Reliability/Data Integrity
Load/unload cycles2 600,000 600,000 600,000 600,000 600,000
Non-recoverable read errors per bits read <1 in 1015 <1 in 1015 <1 in 1015 <1 in 1015 <1 in 1015
Limited warranty (years)3 5 5 5 5 5
Power Management
12VDC (A, max) 1.8 1.8 1.6 2.25 2.25
Average power requirements (W)
Read/Write 10.7 10.7 7.9 6.4 6.4
Idle 8.2 8.2 5.9 4.5 4.5
Standby 1.3 1.3 0.7 0.8 0.8
Sleep 1.3 1.3 0.7 0.8 0.8
Environmental Specifications4
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