Datacenter Capacity HDD
WD Se
Features
Interface: SATA 6 Gb/s
Capacity: 2 TB - 4 TB
Cost effective enterprise-class storage.
Get the right blend of performance, reliability and capacity and keep your total cost of ownership low.

Designed for quality and reliability.
All drives undergo at least 5 million hours of functional testing, and over 20 million hours of additional testing under actual workloads in actual server and storage systems.

Dual processor.
Twice the processing power to maximize performance.

RAFF rotational vibration cancellation technology.
Enhanced Rotary Acceleration Feed Forward (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 the previous generation of drives.

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.

24x7x365 reliability.
Choose the storage foundation specifically designed for SMB to high-end NAS and large-scale datacenter replication environments running 24x7x365.

StableTrac.
The motor shaft is secured at both ends to reduce system-induced vibration and stabilize platters for accurate tracking during read and write operations.

Multi-axis shock sensor.
Automatically detects the subtlest shock events and compensates to protect the data.

RAID-specific, time-limited error recovery (TLER).
Prevents drive fallout caused by the extended hard drive error-recovery processes common to desktop drives.

NoTouch ramp load technology.
The recording head never touches the disk media ensuring significantly less wear to the recording head and media as well as better drive protection in transit.

Maximum capacity for hyperscale environments.
Build a massive data footprint with capacities up to 4 TB - 144 TB per square foot.

Thermal extended 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 heads fly height is adjusted in real time for optimum reliability.

Ideal for:
The Se is best suited for bulk cloud storage, replicated environments, content delivery networks (CDNs), SMB network attached storage (NAS), backup and archiving.

Specifications:

Product Specifications
Interface SATA 6 Gb/s

Performance Specifications
Rotational Speed 7,200 RPM (nominal)
Buffer Size 64 MB
Load/unload Cycles 600,000 minimum

Transfer Rates
Buffer To Host (Serial ATA) 6 Gb/s (Max)

Physical Specifications
Capacity 4 TB
User Sectors Per Drive 7,814,037,168

Performance Specifications
Target Performance
MTBF 800,000 hours

Physical Dimensions
English
Height 1.028 Inches
Depth 5.787 Inches
Width 4.00 Inches
Weight 1.66 Pounds

Metric
Height 26.1 mm
Depth 147 mm
Width 101.6 mm
Weight 0.75 kg

Power Management
Read (Peak Watts) 9.50 Watts
Write (Peak Watts) 9.10 Watts

Environmental Specifications
Shock
Operating Shock (Read) 65G, 2 ms
Non-operating Shock 300G, 2 ms

Acoustics
Idle Mode 31 dBA (average)
Seek Mode 0 34 dBA (average)

Temperature (English)
Operating 41 F to 131 F
Non-operating -40 F to 158 F

Temperature (Metric)
Operating 5 C to 55 C
Non-operating -40 C to 70 C

Electrical Specifications
Current Requirements
Power Dissipation
Read/Write 9.50 Watts
Idle 8.10 Watts

Compatibility
Operating System
Compatibility Windows/Mac