WD Red Pro 4TB NAS Hard Drive, 3.5-inch SATA HDD, 7200 RPM, CMR, 256MB Cache, 550TB/year Workload
Brand:
Western Digital
WD Red Pro 4TB NAS Hard Drive, 3.5-inch SATA HDD, 7200 RPM, CMR, 256MB Cache, 550TB/year Workload
€358.04 inc. VAT
WD4006FFBX
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WD Red Pro 4TB — 3.5-inch NAS hard drive, 7200 RPM, CMR
4TBSATA · 3.5-inch7200 RPM · 256MB cacheCMR · 550TB/year
The WD Red Pro 4TB (WD4006FFBX) is a 3.5-inch SATA NAS hard drive with 7200 RPM, CMR recording and a 256MB cache, built for small and medium businesses running multi-bay NAS systems and RAID arrays that operate 24x7 under heavy, multi-user workloads.
Red Pro is the professional tier of the WD Red family: rated for up to 550TB/year of workload and positioned by WD for RAID-optimised NAS systems with any number of bays. This is the current 4TB model (WD4006FFBX) with 256MB cache; it replaces earlier 4TB Red Pro part numbers such as WD4005FFBX in WD's lineup.
Before you order: This is an internal 3.5-inch drive for NAS, servers and desktop bays. It does not fit 2.5-inch laptop bays and has no USB connection — for external use it needs a 3.5-inch enclosure or docking station with its own power supply.
What's in the Box
- WD Red Pro 4TB 3.5-inch SATA hard drive (bare drive)
- No SATA cable, screws or mounting rails are included — use the trays or caddies of your NAS or chassis
What It Means in Practice
- CMR (conventional magnetic recording) behaves predictably during RAID rebuilds and sustained writes — the reason NAS vendors recommend CMR drives over SMR in multi-drive arrays.
- 7200 RPM and up to 217MB/s transfer rate give faster rebuilds and multi-user access than 5400-class NAS drives, at the cost of a little more heat and noise.
- The 550TB/year workload rating covers continuous office file serving, backups from many PCs, surveillance archives and virtual machine storage.
- NASware firmware is tuned for NAS and RAID environments, so the drive cooperates with the array controller instead of dropping out during long error recovery.
- For a 4-bay NAS in RAID 5, four of these drives give about 12TB of usable space with protection against one drive failure.
What Will Not Work
- It will not fit a laptop or a 2.5-inch bay — this is a 3.5-inch drive.
- It is not an external drive: there is no USB port and it cannot be powered from USB.
- It is not an SSD and will not give SSD-level random performance for databases or boot drives — use it for capacity and sequential workloads.
- Mixing it in a RAID set with SMR drives or very different models is not recommended — build arrays from identical drives where possible.
- It does not include cables, screws or rails.
Key Features
Built for 24x7 NAS
Designed for high-intensity, always-on multi-user environments, with a workload rating of up to 550TB/year.
CMR + 7200 RPM
Conventional magnetic recording and 7200 RPM spindle speed for consistent RAID performance and rebuilds.
NASware firmware
Firmware tuned for NAS and RAID compatibility in systems with any number of bays.
5-year limited warranty
Professional-class coverage from WD, with claims handled through Singular.
Technical Specifications
Frequently Asked Questions
Singular Expert Insight · Buyer's Guide
For a business NAS, 4TB Red Pro drives make sense when you need the 7200 RPM performance and workload rating but not huge capacity — for example a 4- or 8-bay RAID for office files and backups. If you are building a new array, compare the cost per terabyte of larger Red Pro capacities in our NAS HDDs range.
✓ Buy it if you are filling or expanding a multi-bay NAS or RAID array that runs 24x7 for several users.
✕ Skip it if you need a laptop drive, an external drive or SSD-class speed for boot and databases.
→ Also consider the WD Red Pro 8TB (WD8006FFBX) for twice the capacity per bay, or a NAS-rated SSD cache if your NAS supports it.
Not sure the drive is on your NAS compatibility list? Send us the model of your NAS and we will check before you order.
Features - Western Digital - WD4006FFBX
Interface
- SATA
More Details
Product Code
CS62303
EAN Code
0718037909134
Manufacturer
Western Digital
Technical specifications
Capacity
4TB