Seagate
Seagate Barracuda ST2000DM001 2 TB 3.5" 7200 rpm 64 MB SATA internal hard drive
$58.99
0.00075049BTC
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Western Digital
Western Digital WD40EFRX 4TB 5400 RPM 64MB 3.5" SATA internal hard drive
A 4 TB 3.5" SATA drive built for 24/7 NAS use with 64 MB cache and 180 TB/yr workload rating
- PackagingBare Drive
- InterfaceSATA 6.0Gb/s
- Capacity4TB
- RPM5400 RPM
- Cache64MB
- FeaturesAvailable in capacities ranging from 1-14TB with support for
- Designed for always-on NAS with 24×7 operation rating
- CMR technology and 64MB cache keep data flowing steadily
- NASware firmware tunes compatibility for up to 8-bay enclosures
- 180 TB/yr workload rate handles heavy multi-user traffic
- 4TB capacity in a standard 3.5″ SATA form factor
4 TB NAS Drive for Small Arrays
The Western Digital Red Plus WD40EFRX is a 4 TB 3.5 inch internal hard drive built for network-attached storage. It uses a SATA 6.0 Gb/s interface and conventional magnetic recording. The drive is rated for 180 TB per year workload and supports systems with up to 8 bays.
5400 RPM Thermals and Power Profile
Operating at a 5400 RPM performance class with 64 MB cache, the drive runs cooler and quieter than faster desktop disks. The lower spindle speed reduces vibration in multi-bay chassis. NASware firmware manages power states for continuous 24 hour operation in small or medium business environments.
Fits Standard 3.5 Inch Bays
The bare drive measures 147.00 mm long, 101.60 mm wide and 26.10 mm high, matching standard 3.5 inch mounting points. It requires a SATA data cable and a SATA power connector from the host. No extra cooling hardware is mandated by the drive design. Builders needing more than 8 bays or higher sustained write bandwidth should consider other solutions.
Highlights
- Designed for always-on NAS with 24×7 operation rating
- CMR technology and 64MB cache keep data flowing steadily
- NASware firmware tunes compatibility for up to 8-bay enclosures
- 180 TB/yr workload rate handles heavy multi-user traffic
- 4TB capacity in a standard 3.5″ SATA form factor
Specifications
| Brand | WD |
|---|---|
| Series | Red Plus |
| Model | WD40EFRX |
| Packaging | Bare Drive |
| Interface | SATA 6.0Gb/s |
| Capacity | 4TB |
| RPM | 5400 RPM |
| Cache | 64MB |
| Features | Available in capacities ranging from 1-14TB with support for up to 8 bays 5400 RPM performance class Supports up to 180 TB/yr workload rate NASware firmware for compatibility Small or medium business NAS systems in a 24x7 environment |
| Usage | For NAS systems |
| Form Factor | 3.5" |
| Height (maximum) | 26.10mm |
| Width (maximum) | 101.60mm |
| Length (maximum) | 147.00mm |
| Shipping weight | 0.77 kg |
| Package size | 222 × 159 × 76 mm |
Questions about this item
How do I install the WD40EFRX in a NAS bay, and what step is often missed?
Slide the 3.5-inch drive into the bay, secure it with four screws, connect the SATA 6.0Gb/s data and power cables, then use the NAS operating system to create a volume before storing data.
What maintenance or replacement should I plan for with this drive?
The drive is rated for 180 TB per year workload; monitor SMART attributes and replace the unit once reallocated sectors appear or the annual write volume approaches the rated limit.
What limit appears first during sustained 24x7 writes on this model?
The 5400 RPM rotational speed and 64MB cache set the sustained throughput ceiling, so the write-speed plateau is reached before the 180 TB yearly workload rating.
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