Designed specifically with SMB customers in mind, the WD Red family has expanded with the addition of WD Red Pro, which is available for the 8 to 16 bay medium to large-scale NAS environments. With capacities up to 4 TB, WD Red Pro carries a 5-year limited warranty and was engineered to handle the increased workloads from your business.


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Specifications 5 TB
Model number WD50EFRX
Interface SATA 6 Gb/s
Formatted capacity 5 TB
Form factor 3.5-inch
Advanced Format (AF) Yes
Native command queuing Yes
RoHS compliant Yes


Data transfer rate (max)

Interface speed 6 Gb/s
Internal transfer rate 170 MB/s
Cache (MB) 64
Rotational speed (RPM) IntelliPower

Reliability/Data Integrity

Load/unload cycles 600,000
Non-recoverable read errors per bits read <1 in 10 ^14
MTBF (hours) 1,000,000
Limited warranty (years) 3

Power Management

12VDC ±10% (A, peak) 1.75
5VDC ±10% (A, peak)

Average power requirements (W):

Read/Write 5.3
Idle 3.4
 Standby/Sleep 0.4

Environmental Specifications

Temperature (°C):

Operating 0 to 65
Non-operating -40 to 70

Shock (Gs):

Operating (2 ms, read/write) 30
Operating (2 ms, read) 65
Non-operating (2 ms) 250

Acoustics (dBA):

Idle 25
Seek (average) 28

Physical Dimensions

Height (in./mm) 1.028/26.1
Length (in./mm) 5.787/147
Width (in./mm, ± .01 in.) 4/101.6
Weight (lb./kg, ± 10%) 1.65/0.75
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From Hardware BBQ:

Coming back to the drive, the transfer rate via SATA III standard is great. WD Red series provides a good-enough compromise between standard consumer drives and enterprise drive for home and/or office NAS and DAS. As one would assume, these are good choices for a secondary drive and for dedicated units like NAS.

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