OVERVIEW:
Model & Designation: WD Red Plus 4 TB (WD40EFPX), tailored for NAS environments using CMR (Conventional Magnetic Recording) technology — ideal for RAID and high-demand setups.
Interface & Physical Specs:
SATA III (6 Gb/s), 3.5-inch form factor.
Cache: 256 MB.
Speed: 5400 RPM class; maximum sustained data transfer up to 180 MB/s.
NAS-Optimized Features:
NASware 3.0 firmware enhances system compatibility, integration, and reliability — especially in RAID/24×7 NAS systems.
3D Active Balance Plus and RV sensors mitigate vibration and noise in multi-drive setups.
Built for continuous operation with MTBF of 1 million hours, workload rating of 180 TB/year, and optimized error recovery controls.
Reliability Metrics:
Load/unload cycles: ~600,000.
Non-recoverable read error rate: <1 in 10¹⁴.
 
WARRANTY DETAILS :
Standard Warranty: WD backs this NAS-class drive with a 3-year limited manufacturer’s warranty, providing peace of mind for long-term deployment.
Important Note on Warranty Eligibility: Warranty coverage generally applies only in the region where the product was originally shipped or purchased. Buying from a different region may lead to difficulties in servicing later.