WD Red Pro
3.5-inch NAS SATA Hard Drive

Overview

For the Demands of Big Business

Designed specifically with medium or large scale business customers in mind, WD Red Pro drives are available for up to 24-bay NAS systems. Engineered to handle high-intensity workloads¹ in 24x7 environments, WD Red Pro is ideal for archiving and sharing, as well as RAID array rebuilding on extended operating systems such as ZFS or other file systems. These drives add value to your business by enabling your employees to quickly share their files and back-up folders reliably in your NAS solution.

Desktop drives vs. WD Red Pro

Do right by your NAS and choose the drive purpose-built for NAS with an array of features to help preserve your data and maintain optimum performance. Take the following into consideration when choosing a hard drive for your NAS:

• Compatibility: Unlike desktop drives, these drives are specifically tested for compatibility with NAS systems for optimum performance.  
• Reliability: The always-on environment of a NAS or RAID is a hot one, and desktop drives aren’t typically designed and tested under those conditions like  WD Red™ Pro drives are. 
• Error Recovery Controls:  WD Red™ Pro NAS hard drives are specifically designed with RAID error recovery control to help reduce failures within the NAS system. 
• Noise and Vibration Protection: Designed to operate solo, desktop drives typically offer little or no protection from the noise and vibration present in a multi-drive system. WD Red™ Pro drives are designed to thrive in multi-bay NAS system environments.

¹ As used for storage capacity, one terabyte (TB) = one trillion bytes. Total accessible capacity varies depending on operating environment.
² Workload Rate is defined as the amount of user data transferred to or from the hard drive. Workload Rate is annualized (TB transferred X (8760 / recorded power-on hours)). Workload Rate will vary depending on your hardware and software components and configurations.
³ MTBF and AFR: Projected values for model number WD201KRYZ. Final MTBF and AFR specifications will be based on a sample population and are estimated by statistical measurements and acceleration algorithms under typical operating conditions, workload 220TB/year and temperature 40C. Derating of MTBF and AFR will occur above these parameters, up to 550TB writes per year and 60C ambient (65C device temp). MTBF and AFR ratings do not predict an individual drive's reliability and do not constitute a warranty

Specifications

Formatted Capacity	18TB	16TB	14TB	12TB	10TB
Model Number	WD181KFGX	WD161KFGX	WD141KFGX	WD121KFBX	WD102KFBX
Form Factor	3.5-inch	3.5-inch	3.5-inch	3.5-inch	3.5-inch
Interface	SATA 6 Gb/s	SATA 6 Gb/s	SATA 6 Gb/s	SATA 6 Gb/s	SATA 6 Gb/s
Recording Technology	CMR	CMR	CMR	CMR	CMR
Native command queuing	Yes	Yes	Yes	Yes	Yes
Advanced Format (AF)	Yes	Yes	Yes	Yes	Yes
RoHS compliant3	Yes	Yes	Yes	Yes	Yes
Performance
Interface Transfer Rate (max) Interface Speed	6 Gb/s	6 Gb/s	6 Gb/s	6 Gb/s	6 Gb/s
Interface Transfer Rate (max)4 Internal Transfer Rate	272 MB/s	259 MB/s	255 MB/s	240 MB/s	265 MB/s
Cache5	512MB	512MB	512MB	256MB	256MB
RPM	7200	7200	7200	7200	7200
Reliability/Data Integrity
Load/unload cycles6	600,000	600,000	600,000	600,000	600,000
Non-recoverable errors per bits read	<10 in 1014	<10 in 1014	<10 in 1014	<10 in 1014	<10 in 1014
MTBF (hours)7	1,000,000	1,000,000	1,000,000	1,000,000	1,000,000
Workload Rate (TB/year)8	300	300	300	300	300
Limited Warranty	5 years
Power Management
12VDC ±5% (A, peak)			1.85A	1.8A	1.75A
5VDC ±5% (A, peak)	1.80A	1.80A
Read/Write	6.1W	6.1W	6.2W	6.0W	8.4W
Idle	3.6W	3.6W	3.0W	2.8W	4.6W
Standby and Sleep	0.9W	0.9W	0.8W	0.6W	0.5W
Environmental
Operating Temperature	0° to 65°C	5° to 60°C	5° to 60°C	5° to 60°C	5° to 60°C
Non-Operating Temperature	-40° to 70°C	-40° to 70°C	-40° to 70°C	-40° to 70°C	-40° to 70°C
Shock Operating, (2 ms, read/write)	30G	30G	30G	30G	30G
Shock Operating, (2 ms, read)	50G	50G	65G	65G	65G
Shock Non-operating (2 ms)	250G	250G	250G	250G	250G
Acoustics (average) - Idle Mode	20 dBA	20 dBA	20 dBA	20 dBA	20 dBA
Acoustics (average) - Seek Mode	36 dBA	36 dBA	36 dBA	36 dBA	38 dBA
Physical Dimensions
Height (max)	1.028 inch (26.1mm)
Length (max)	5.787 inch (147.0 mm)
Width (± .01 in.)	4 inch (101.6 mm)
Weight	1.52 lb (0.69 kg)	1.52 lb (0.69 kg)	1.52 lb (0.69 kg)	1.46 lb. (0.66 kg)	1.65 lb. (0.75 kg)
Formatted Capacity	10TB	8TB	6TB	4TB	2TB
Model Number	WD101KFBX	WD8003FFBX	WD6003FFBX	WD4003FFBX	WD2002FFSX
Form Factor	3.5-inch	3.5-inch	3.5-inch	3.5-inch	3.5-inch
Interface	SATA 6 Gb/s	SATA 6 Gb/s	SATA 6 Gb/s	SATA 6 Gb/s	SATA 6 Gb/s
Recording Technology	CMR	CMR	CMR	CMR	CMR
Native command queuing	Yes	Yes	Yes	Yes	Yes
Advanced Format (AF)	Yes	Yes	Yes	Yes	Yes
RoHS compliant3	Yes	Yes	Yes	Yes	Yes
Performance
Interface Transfer Rate (max) Interface Speed	6 Gb/s	6 Gb/s	6 Gb/s	6 Gb/s	6 Gb/s
Interface Transfer Rate (max)4 Internal Transfer Rate	240 MB/s	235 MB/s	238 MB/s	217 MB/s	164 MB/s
Cache5	256MB	256MB	256MB	256MB	64MB
RPM	7200	7200	7200	7200	7200
Reliability/Data Integrity
Load/unload cycles6	600,000	600,000	600,000	600,000	600,000
Non-recoverable errors per bits read	<10 in 1014	<10 in 1014	<10 in 1014	<10 in 1014	<10 in 1014
MTBF (hours)7	1,000,000	1,000,000	1,000,000	1,000,000	1,000,000
Workload Rate (TB/year)8	300	300	300	300	300
Limited Warranty	5 years
Power Management
12VDC ±5% (A, peak)	1.80A	2.08A	1.79A	1.79A	1.90A
5VDC ±5% (A, peak)
Read/Write	5.7W	8.8W	7.2W	7.2W	7.8W
Idle	2.8W	4.6W	3.7W	3.7W	6.0W
Standby and Sleep	0.5W	0.7W	0.4W	0.4W	1.4W
Environmental
Operating Temperature	0° to 65°C	5° to 60°C	5° to 60°C	5° to 60°C	5° to 60°C
Non-Operating Temperature	-40° to 70°C	-40° to 70°C	-40° to 70°C	-40° to 70°C	-40° to 70°C
Shock Operating, (2 ms, read/write)	30G	30G	30G	30G	30G
Shock Operating, (2 ms, read)	50G	50G	65G	65G	65G
Shock Non-operating (2 ms)	300G	300G	300G	300G	300G
Acoustics (average) - Idle Mode	20 dBA	29 dBA	29 dBA	29 dBA	29dBA
Acoustics (average) - Seek Mode	36 dBA	36 dBA	36 dBA	36 dBA	31 dBA
Physical Dimensions
Height (max)	1.028 inch (26.1mm)
Length (max)	5.787 inch (147.0 mm)
Width (± .01 in.)	4 inch (101.6 mm)
Weight	1.43 lb (0.65 kg)	1.58 lb (0.72 kg)	1.58 lb (0.72 kg)	1.58 lb (0.72 kg)	1.58 lb (0.72 kg)

¹ Not all products may be available in all regions of the world
² As used for storage capacity, one gigabyte (GB) = one billion bytes and one terabyte (TB) = one trillion bytes. Total accessible capacity varies depending on operating environment.
³ WD hard drive products manufactured and sold worldwide after June 8, 2011, meet or exceed Restriction of Hazardous Substances (RoHS) compliance requirements as mandated by the RoHS Directive 2011/65/EU.
⁴ Up to stated speed. As used for transfer rate, 1 MB/s = 1 million bytes per second. Based on internal testing; performance may vary depending upon host device, usage conditions, drive capacity, and other factors.
⁵ As used for cache, one megabyte (MB) = 1,048,576 bytes.
⁶ Controlled unload at ambient condition.
⁷ MTBF specifications are based upon internal testing using a 40°C base casting temperature. MTBF is based on a sample population and is estimated by statistical measurements and acceleration algorithms. MTBF does not predict an individual drive’s reliability and does not constitute a warranty.
⁸ Workload Rate is defined as the amount of user data transferred to or from the hard drive. Workload Rate is annualized (TB transferred x (8760 / recorded power-on hours)). Workload Rate will vary depending on your hardware and software components and configurations.
⁹ See http://support.wd.com/warranty for regionally specific warranty details.
¹⁰ Power measurements at room-ambient temperature.

Documentation

Download the WD Red Pro NAS SATA HDD Datasheet (.PDF)