WD RED 4TB NAS CAVIAR RED 64MB Cache SATA3 6Gbps CMR 3-Year Warranty
SKU: ZY-WD40EFRX-3YEARPC Components › NAS Hard Drives· Model: WD40EFRX
Please enquire before ordering
The distributor has not yet confirmed the latest price and availability (last checked Jun 15, 2026)
092-251-4017Awaiting stock confirmation3 years manufacturer's warranty
GenuineFree delivery from ฿5,000Tax invoice
WD Red 4TB hard drive designed for NAS and CCTV recording systems, engineered for 24/7 continuous operation with CMR technology and 64MB cache, supports SATA III up to 6 Gbps speed
Key features
- Specifically designed for NAS and CCTV, supports 24/7 operation
- Uses high-stability CMR technology to reduce data loss risk
- 64MB cache enhances read/write speed
- Supports SATA III up to 6 Gbps
- Stably supports RAID configurations
Product description
The WD Red 4TB WD40EFRX model is specifically designed for use in NAS and CCTV recording systems, supporting 24/7 continuous operation with high-stability CMR (Conventional Magnetic Recording) technology, which reduces data loss risk in frequent write workloads compared to SMR. With 64MB cache and maximum read/write speeds of 230 MB/s, it enables smooth handling of large files. Supports SATA III interface at 6 Gbps speed and comes with a full 3-year warranty. This model is officially verified compatible with the Zyxel NAS542
More features
- Engineered to reduce vibration and noise
- Ideal for storing large files such as 4K video
Pros and limitations
Pros
- Specifically designed for NAS and CCTV, supports 24/7 continuous operation
- Uses high-stability CMR technology to reduce data loss risk
- 64MB cache enhances read/write data speed
- Supports SATA III up to 6 Gbps
Limitations
- 3.5" size requires a dedicated drive bay or mounting frame
- Higher operating noise compared to SSDs
Who it is for
Ideal for users who need to install NAS systems or CCTV recording systems requiring stability, durability, and reliable management of large data volumes
Connectivity
SATA3
Specifications (41)
- MTBF
- 1,000,000 hours
- Cache
- 64 MB
- Weight
- 1.0 kg
- Capacity
- 4 TB
- Warranty
- 3 years
- Interface
- SATA III (6 Gbps)
- Self-Test
- Supports background and manual self-test
- Cache Type
- DRAM
- Dimensions
- 26.1 x 101.6 x 147 mm
- Technology
- CMR
- Form Factor
- 3.5"
- Noise Level
- 27 dB(A) (idle), 32 dB(A) (active)
- Idle Current
- 0.6 A (5V), 0.2 A (12V)
- Model Number
- WD40EFRX
- Power Supply
- 5V/12V
- Compatibility
- Zyxel NAS542 (verified), WD Red series
- Power On Time
- ≤ 10 seconds
- Spindle Speed
- 7200 RPM
- Acoustic Noise
- 27 dB(A) (idle), 32 dB(A) (active)
- Certifications
- CE, FCC, RoHS
- Drive Firmware
- Latest firmware available via WD website
- Product Series
- WD Red
- Shock Tolerance
- 300 G (non-operating), 150 G (operating)
- Drive Status LED
- Yes
- Firmware Upgrade
- Supports online firmware update
- Rotational Speed
- 7200 RPM
- Shock Resistance
- 300 G (non-operating), 150 G (operating)
- Start-up Current
- 2.5 A (5V), 1.0 A (12V)
- Storage Humidity
- 5% to 95% non-condensing
- Average Seek Time
- 8.5 ms
- Operating Current
- 0.8 A (5V), 0.3 A (12V)
- Power Consumption
- 8.5 W (active), 2.5 W (idle)
- Data Transfer Rate
- 230 MB/s
- Drive Activity LED
- Yes
- Operating Humidity
- 8% to 85% non-condensing
- Storage Temperature
- -40°C to 65°C
- Vibration Tolerance
- 2.5 G (non-operating), 1.5 G (operating)
- Vibration Resistance
- 2.5 G (non-operating), 1.5 G (operating)
- Operating Temperature
- 0°C to 60°C
- Drive Health Monitoring
- S.M.A.R.T.
- Mean Time Between Failures
- 1,000,000 hours
Datasheets and manuals straight from the manufacturer — select a document to open or download it.
13 questions
Frequently asked questions about this product
Compiled from manufacturer information
Can WD40EFRX be used with Zyxel NAS542?
Yes, the WD40EFRX is officially verified compatible with the Zyxel NAS542, listed in Zyxel's Verified Hard Disk List
Can WD40EFRX be used with WD40EFAX?
Not recommended for use together, as WD40EFAX uses SMR technology, which may cause stability issues in RAID or NAS systems
What is the read/write speed of WD40EFRX?
Maximum read/write speed is 230 MB/s, supports SATA III up to 6 Gbps, enabling smooth handling of large files
Can WD40EFRX be installed in a RAID system?
Yes, this model is officially verified to support RAID operation, particularly with Zyxel NAS542 and other NAS systems supporting WD Red
How much power does WD40EFRX consume?
Uses 8.5 watts in active mode and 2.5 watts in standby mode, making it suitable for continuous operation without excessive power consumption
How many years of warranty does WD40EFRX have?
3-year full warranty from date of purchase, with direct support from WD
What technology does WD40EFRX use?
Uses CMR (Conventional Magnetic Recording) technology, which offers higher stability than SMR, especially in workloads requiring frequent data writing, such as NAS and CCTV
Does WD40EFRX support firmware updates?
Yes, supports online firmware updates via the WD website, allowing users to check and update firmware anytime to improve performance and security
Is it in stock?
We are confirming the latest stock and price of the WD RED 4TB NAS CAVIAR RED 64MB Cache SATA3 6Gbps CMR 3-Year Warranty with the distributor. Please contact us before ordering at 092-251-4017 or sales@gist.co.th.
How much does it cost?
The distributor has not yet confirmed the latest price and availability. Please contact us before ordering at 092-251-4017 or sales@gist.co.th.
How long is the warranty?
Warranty period: 3-year warranty (manufacturer's terms). To make a warranty claim, call 092-251-4017 or 065-523-5262, or email sales@gist.co.th (Mon–Fri 9:00–18:00), then send the product with your order number to our head office, or bring it to the head office in person.
How long does delivery take?
Orders placed before 12:00 on a business day are delivered within 1–3 business days (Bangkok and vicinity) or 2–5 business days (other provinces). Free delivery on orders of ฿5,000 or more (a ฿150 delivery fee applies below this amount).
Is it genuine?
Genuine products sourced from distributors in Thailand, covered by the manufacturer's warranty. Full tax invoices are available.
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Genuine products
Sourced from distributors in Thailand and covered by the manufacturer's warranty
Warranty period
3-year warranty
Covered by the manufacturer's warranty; you can make claims through GIST
Claims through GIST
Ship the product to our head office or bring it in person
Warranty conditions
- A receipt or other proof of purchase is required
- The product must not have been modified or altered
- Damage caused by misuse is not covered by the warranty
- To make a warranty claim, call 092-251-4017 or 065-523-5262, or email sales@gist.co.th (Mon–Fri 9:00–18:00), then send the product with your order number to our head office, or bring it to the head office in person.Head office: 554 Sky Nine Center, Floor 12A, Room 554/62, Asok-Din Daeng Road, Din Daeng Subdistrict, Din Daeng District, Bangkok 10400
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