WD Western Digital WD40EFRX 4T/TB Desktop Western Digital 4tb Red Disk Red NAS Dedicated Hard Drive

WD Red 4TB HDD Review (WD40EFRX)

Model number: WD40EFRX

Interface: SATA 6 Gb/s

Formatted capacity: 4TB

Form factor: 3.5-inch

Advanced Format (AF): Yes

RoHS compliant: Yes

Data transfer rate (max)

Interface speed: 6 Gb/s

Internal transfer rate: 150 MB/s

Cache (MB): 64

Rotational speed (RPM): IntelliPower

Load/unload cycles: 300,000

Non-recoverable read errors per bits read: <1 in 1014

MTBF (hours): 1,000,000

Limited warranty (years): 3

12VDC ±10% (A, peak): 1.75

5VDC ±10% (A, peak): –

Average power requirements (W)

• • Read/Write: 4.5
  • Idle: 3.3
  • Standby/Sleep: 0.4Temperature (°C)
  • Operating: 0 to 70
  • Non-operating: -40 to 70Shock (Gs)
  • Operating (2 ms, read/write): 30
  • Operating (2 ms, read): 65
  • Non-operating (2 ms): 250Acoustics (dBA)
  • Idle: 25
  • Seek (average): 28 
  • 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%): 1.50/0.68