SSD SATA Solid State HDD for Security Surveillance DVR NVR Recorder Wd Enterprises 4tb 3.5inch CCTV Storage Hard Drive Disk

• Purpose: Security Surveillance Use
• Form Factor: 3.5-Inch
• Warranty: 3 Years
• Shipping Cost: Estimated freight per unit.: about shipping cost and estimated delivery time.
• Currency: US$
• Return&refunds: You can apply for a refund up to 30 days after receipt of the products.
• Model NO.: WD40EJRX
• Cache: 64MB
• Interface2: SATA 6 GB/S
• Formatted Capacity2: 4tb
• Transport Package: 488*266*203mm
• Specification: 20PCS/Carton
• Trademark: WDVELEY
• Origin: Thailand
• HS Code: 8521909090
• Production Capacity: 10000 Pieces Per Year
• Package Size: 30.00cm * 30.00cm * 40.00cm
• Package Gross Weight: 1.000kg

Product Description

Product Benefits

Full range of nearline capacities

From entry-level servers to  high end enterprise storage systems, WD
Gold™ hard drives offer the capacities required for the most demanding datacenter environments.

High workload capability

Delivering both performance and reliability to any datacenter
environment, WD Gold™ hard drives are designed to handle workloads up to 550TB per year which is among the highest workload capability of any 3.5- inch hard drive.
 

High level of reliability

With up to 2.5 million hours MTBF, WD Gold™ hard drives deliver one of the highest levels of reliability and durability for yearly operation
(24x7x365) within the most demanding storage environments.

Vibration protection

Enhanced RAFF™ technology includes sophisticated electronics to monitor the drive and correct both linear and rotational vibration in real time. The result is a significant performance improvement in high vibration environments over our desktop hard drives.

RAID-specific, time-limited error recovery (TLER)

Reduces drive fallout caused by the extended hard drive error-recovery processes common to desktop drives.

Extended thermal burn-in test

Each drive is put through extended burn-in testing with thermal cycling to ensure reliable operation.

Dynamic fly height technology

Each read-write head's fly height is adjusted in real time for optimum reliability.

Dual actuator technology

A head positioning system with two actuators that improves positional accuracy over the data track(s). The primary actuator provides coarse displacement using conventional electromagnetic actuator principles. The secondary actuator uses piezoelectric motion to fine tune the head positioning to a higher degree of accuracy.

Compatibility testing

All WD Gold™ hard drives are extensively tested across a variety of popular OEM storage systems, SATA controllers, and host bus adapters, to ensure ease of integration for a plug and play solution."

Premium support

Dedicated 24x7 over the phone support is included with every WD Gold™ hard drive.
 

ApplicationsEnterprise servers, datacenter environments, enterprise storage systems, data warehousing/mining, enterprise NAS, and high end surveillance systems.

The WD AdvantageWD puts datacenter products through extensive Functional Integrity Testing (F.I.T.) prior to any product launch. This testing ensures our products consistently meet the high quality and reliability standards of the WD brand. Following a FIT test the Enterprise System Group (ESG) testing validates interoperability with HBAs, operating systems, and drivers, to ensure an even greater level of quality, reliability, and peace of mind.
WD also has a detailed Knowledge Base with helpful articles and software utilities. Our customer support lines have long operational hours to ensure you get the help you need when you need it. Our toll-free customer support lines are here to help or you can access our WD Support site for additional details.

 

Specifications	8TB	6TB	4TB
512 emulation model number1	WD8002FRYZ	WD6002FRYZ
512 native model number1			WD4002FYYZ
Logical/Physical bytes per sector	512 / 4096	512 / 4096	512 / 512
Formatted capacity2	3TB	2TB	1TB
512n/512e user sectors per drive	15,628,053,168	11,721,045,168	7,814,037,168
Interface2	SATA 6 Gb/s	SATA 6 Gb/s	SATA 6 Gb/s
Native Command Queuing	Yes	Yes	Yes
Form Factor	3.5-inch	3.5-inch	3.5-inch
RoHS compliant3	Yes	Yes	Yes
Performance
Data transfer rate (max)2 Buffer to host Host to/from drive (sustained)	6 Gb/s 205 MB/s	6 Gb/s 226 MB/s	6 Gb/s 201 MB/s
Cache (MB)	128	128	128
Performance Class	7200 RPM Class	7200 RPM Class	7200 RPM Class
Reliability/Data Integrity
Load/unload cycles4	600,000	600,000	600,000
Non-recoverable read errors per bits read	<1 in 1015	<1 in 1015	<1 in 1015
MTBF (hours)5	2,500,000	2,000,000	2,000,000
AFR (%)5	0.35	0.44	0.44
Limited warranty (years)6	5	5	5
Power Management
Average power requirements (W) Sequential read Sequential write Random read/write Idle	7.2 7.0 7.4 5.1	9.3 8.9 9.1 7.1	9.0 8.7 8.8 7.0
Environmental Specifications7
Temperature (°C) Operating Non-operating	5 to 60 -40 to 70	5 to 60 -40 to 70	5 to 60 -40 to 70
Shock (Gs) Operating (half-sine wave, 2 ms) Non-operating (half-sine wave)	70G 300 (1ms)/150 (11ms)	70G 300 (1ms)/150 (11ms	70G 300 (1ms)/150 (11ms
Acoustics (dBA)8 Idle Seek (average)	20 36	29 36	29 36
Physical Dimensions
Height (in./mm, max)	1.028/26.1	1.028/26.1	1.028/26.1
Length (in./mm, max)	5.787/147	5.787/147	5.787/147
Width (in./mm, ± .01 in.)	4/101.6	4/101.6	4/101.6
Weight (lb/kg, ± 10%)	1.43/0.65	1.58/0.715	1.58/0.715