WD Red 4TB 3.5" NAS 150MB/s HDD
This item is End Of Life
WD Red 4 TB Hard Drive for NAS ( WD40EFRX)
|Interface||SATA 6 Gb/s|
|Rotational Speed||IntelliPower *|
|Buffer Size||64 MB|
|Buffer To Host (Serial ATA)||6 Gb/s (Max)|
|Formatted Capacity||4,000,787 MB|
|User Sectors Per Drive||7,814,037,168|
|Operating Shock (Read)||65G, 2 ms|
|Non-operating Shock||250G, 2 ms|
|Idle Mode||25 dBA (average)|
|Seek Mode 0||28 dBA (average)|
|Operating||32° F to 158° F|
|Non-operating||-40° F to 158° F|
|Operating||-0° C to 70° C|
|Non-operating||-40° C to 70° C|
|Operating||5-95% RH non-condensing|
|Operating||0.004 g²/Hz (10 to 300 Hz)|
|Non-operating||0.05 g²/Hz (10 to 300 Hz)|
|Linear||20-300 Hz, 0.75G (0 to peak)|
HDD speed The rotational speed of a hard disk expressed in rotations per minute. The faster the better.
Interface Interface ports to connect pieces of equipment. USB (Universal Serial Bus) has become the most popular wired interface to connect peripherals. USB 2.0 supports speeds up to 480 Mbit/s (USB 1: 12 Mbit/s). The interface FireWire is also known as the IEEE 1394 standard. Enhanced IDE (EIDE)is sometimes referred to as Fast ATA, Fast IDE or ATA-2.
Serial ATA III
Storage drive buffer size
HDD interface transfer rate
HDD sustained transfer rate
Mean time between failures (MTBF) Statistical model used to indicate product/mechanism reliability; expressed in hours and percentage of duty cycle. This number (in hours) does not indicate the mean time before failure for a single unit/mechanism.
RoHS compliance The Restriction of Hazardous Substances (RoHS) Directive aims to restrict certain dangerous substances commonly used in electrical and electronic equipment. Any RoHS compliant product is tested for the presence of Lead (Pb), Cadmium (Cd), Mercury (Hg), Hexavalent chromium (Hex-Cr), Polybrominated biphenyls (PBB), and Polybrominated diphenyl ethers (PBDE). PBB and PBDE are flame retardants used in several plastics. For Cadmium and Hexavalent chromium, there must be less than 0.01% of the substance by weight at raw homogeneous materials level. For Lead, PBB, and PBDE, there must be no more than 0.1% of the material, when calculated by weight at raw homogeneous materials. Any RoHS compliant component must have 100 ppm or less of mercury and the mercury must not have been intentionally added to the component. In the EU, some military and medical equipment are exempt from RoHS compliance.
Power consumption (standby) The amount of electricity that is consumed when the product is on standby.
Power consumption (read)
Power consumption (write)
Power consumption (idle)
Operating temperature (T-T) The minimum and maximum temperatures at which the product can be safely operated.
0 - 65 °C
Storage temperature (T-T) The minimum and maximum temperatures at which the product can be safely stored.
-40 - 70 °C
Weight & dimensions
|Product Condition||Brand New/Unused|
|Drive Form Factor||3.5"|
|Hard Drive Spindle Speed||5400RPM|
|Storage Size (HDD)||4000 GB|
|Storage Technology||SATA 6Gb/s|