WD Red™ 4TB 3.5" Internal Hard Drive For NAS, 64MB Cache, SATA/600, WD40EFRX Item # 663886
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WD's exclusive NASware technology, built into every WD Red hard drive, improves NAS storage performance by reducing common hard drive concerns in NAS systems including concerns for things like compatibility, integration, upgradeability, reliability and cost of ownership that are experienced with a hard drive designed for desktop computers.
|buffer size||64 MB|
|cache size||64 MB|
|Compatible Bay||3.5" x 1/3H|
|device connector type||SATA/600|
|hard drive type||hard drive|
|hard drive width||3.5 in.|
|Load / Unload Cycles||600,000|
|manufacturer||Western Digital Corporation|
|maximum data transfer rate||768 MB/s (6 Gbit/s)|
|Product Name||RED WD40EFRX Hard Drive|
|Spindle Speed (rpm)||5400|
|storage capacity||4 TB|
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WD Red was the original color of NAS. Our formula of success has led growth of WD Red into higher capacities and expansion into new 2.5-inch solutions. We now offer a broader, more comprehensive portfolio of NAS solutions for our customers. Every component, line of code, and product decision was built on our passion and determination to deliver the best NAS experience. The next generation of WD Red hard drives delivers on this promise with massive capacity and NASware™ 2.0, which further improves drive reliability and protects your data in the event of a power loss or power disruption. It is not just about NAS drives, it is REDvolutionary™.
*Compatibility list as of March 2016
- Compatibility: Without being tested for compatibility with your NAS system, optimum performance is not guaranteed.
- Reliability: The always-on environment of a NAS or RAID is a hot one. And desktop drives aren't typically designed and tested in those conditions. WD Red is.
- Error recovery Controls: WD Red NAS hard drives are specifically designed with RAID error recovery control to help reduce failures within the NAS system. Desktop drives are typically not designed for RAID environments where this can be an issue.
- Noise and Vibration Protection: Designed to operate solo, desktop drives offer little or no protection from the noise and vibration faced in a multi-drive system. WD Red drives are designed for multi-bay NAS systems.
|Transfer Rates Buffer To Host (Serial ATA)||6 Gb/s (Max)|
|Transfer Rates Transfer Rate (Buffer To Disk)||150 MB/s (Sustained)|
|Target Performance MTBF||1,000,000 hours|
|Formatted Capacity||4,000,787 MB|
|Form Factor||3.5 Inch|
|User Sectors Per Drive||7,814,037,168|
|Metric Height||26.1 mm|
|Metric Depth||147 mm|
|Metric Width||101.6 mm|
|Metric Weight||0.68 kg|
|Shock Operating Shock (Read)||65G, 2 ms|
|Shock Non-operating Shock||250G, 2 ms|
|Acoustics Idle Mode||25 dBA (average)|
|Acoustics Seek Mode 0||28 dBA (average)|
|Temperature (Metric) Operating||-0° C to 70° C|
|Temperature (Metric) Non-operating||-40° C to 70° C|
|Humidity Operating||5-95% RH non-condensing|
|Vibration Operating||0.004 g²/Hz (10 to 300 Hz)|
|Vibration Non-operating||0.05 g²/Hz (10 to 300 Hz)|
|12 VDC Read/Write||250 mA|
|12 VDC Idle||230 mA|
|12 VDC Standby||7 mA|
|12 VDC Sleep||7 mA|
|5 VDC Read/Write||280 mA|
|5 VDC Idle||260 mA|
|5 VDC Standby||105 mA|
|5 VDC Sleep||105 mA|
|Power Dissipation Read/Write||4.50 Watts|
|Power Dissipation Idle||3.30 Watts|
|Power Dissipation Standby||0.40 Watts|
|Power Dissipation Sleep||0.40 Watts|