Western Digital RE EX800M WD4000FYYX Enterprise SATA Hard Drive

Western Digital Part #/MPN: WD4000FYYX

DiscTech Item #: WDC-WD4000FYYX-BN-OE-DEL

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Enterprise Grade

Capacity: 4TB

Speed: 7,200RPM

Interface Types: SATA

Form Factor: 3.5inx1.0in LFF Hard Drive

Sector Size: 512 / 512e

Sustained Throughput: 171

Electrical Interface: SATA 600 - 6.0Gbps

On-Board Cache: 64MB

Western Digital RE EX800M WD4000FYYX 4000GB / 4TB 6Gbps 7.2K Enterprise SATA 600 - Hard Drive - Brand New OEM

WD RE 7200 RPM Enterprise SATA hard drives are packed with performance and reliability features making them the perfect solution for enterprise storage and servers, video surveillance, and other demanding write-intensive applications. With a designed, manufactured and demonstrated MTBF of 1,200,000 hours at 100% duty cycle in nominal enterprise conditions, 64 MB cache, and best-in-class vibration tolerance, these drives are the ultimate in Enterprise SATA storage.

Product Features:

  • Rotary Acceleration Feed Forward (RAFF) — These drives employ RAFF technology to maintain hard drive performance in high vibration environments through adaptive compensation of the servo system
  • Native Command Queuing (NCQ) — Performance of a random I/O workload can be improved through intelligent re-ordering of the I/O requests so they read/write to and from the nearest available sectors and minimize the need for additional disk revolutions or head actuator movement. This improvement can be achieved though Native Command Queing (NCQ) , which is supported by these hard drives.
  • MicroFemto Slider — These drives incorporate the next generation of femto slider form factor in which the read/write head is mounted on the small, lightweight microfemto slider that allows the head to move more quickly from track to track on the disk.
  • Staggered Spin-Up — Next generation SATA 6 Gb/s feature that allows the system to control whether the drive will spin up immediately or wait until the interface is fully ready

Alternate Part Numbers: 0N36YX N36YX WD4000FYYX-18RS1B0 HANNHVJMBB 9G00R1200 771822


This drive is compatible with any system that uses SATA drives.

Series Overview WD4000FYYX
InterfaceSATA 6Gb/s
Capacity (GB) at 512 Bytes/secotr


Form factor


Sector size (bytes)


Max. areal density (Gbits/sq. in)


Data buffer (MB) 64
Rotational speed (RPM) 7200
Interface transfer rate (MB/sec, max) 600
Sustained transfer rate (MB/sec, typical) 171
Seek time (read, ms, typical) 8.0
Error rate (non-recoverable, bits read) 1 in 1015
Load/unload cycles (at 40° C) 600,000
Availability (hrs/day x days/wk) 24/7
Targeted MTBF (M hours) 2.0
Warranty (yrs.) 5
Idle (Bels, typical) 2.9
Requirement+5 VDC (+/-5%)
+12 VDC (+10%/-8%)
Startup current (A, max) 1.2 (+5V), 2.0 (+12V)
Read/write (W) 11.4
Unload idle (W) 5.7
Physical size
z-height (mm, max) 26.1
Dimensions (width x depth, mm) 101.6 (+/-0.25) x 147
Weight (g, typical) 690
Environmental (operating)
Ambient temperature 5° to 60° C
Shock (half-sine wave 2 ms, G) 70
Vibration, random (G RMS 5 to 500 Hz) 0.67 (XYZ)
Environmental (non-operating)
Ambient temperature -40° to 70° C
Shock (half-sine wave 2 ms, G)300

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ROHS Compliant

Alternate MPNs: 0N36YX N36YX WD4000FYYX-18RS1B0 HANNHVJMBB 9G00R1200 771822

Weight: 1.8 lb

Warranty: 1 Year DiscTech

Brand New

Condition Levels Explained

The product is brand new.

1 Year DiscTech Warranty

Product Warranties Explained

The product has a DiscTech warranty for the time period specified. View our limited warranty