| Hard Drive | 4 TB Mechanical Hard Disk |
|---|
Western Digital 4TB WD Blue PC Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, 256 MB Cache, 3.5" - WD40EZAZ
| Digital Storage Capacity | 4 TB |
| Hard Disk Interface | Serial ATA-600 |
| Connectivity Technology | SATA |
| Brand | Western Digital |
| Special Feature | Data Recovery Service |
| Hard Disk Form Factor | 3.5 Inches |
| Hard Disk Description | Mechanical Hard Disk |
| Compatible Devices | PC, Desktop, Xbox |
| Installation Type | Internal Hard Drive |
| Color | 4TB |
About this item
- Reliable everyday computing
- Western Digital quality and reliability
- Free Acronis True Image WD Edition cloning software
- Massive capacity up to 6TB
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From the manufacturer
Purpose-built for Productivity
The WD Blue internal hard drive delivers dependable performance for your everyday office and web applications. Designed for use as a primary storage drive in desktop PCs, select the ideal capacity for your PC.
No Touch Ramp Load Technology
Our no-touch ramp load technology provides safer drive protection when you carry the drive from one location to another, ensuring less wear to the recording head and media.
Confidence in Compatibility
We’ve tested for this device’s compatibility with hundreds of systems and platforms in our FIT Lab to ensure confidence in compatibility.
Upgrade Your Drive with One Step
Copy all of your valuable content to your new WD drive without losing a file with the Acronis True Image software, available for free on the Western Digital Support site.
Powerful Performance, Low Power Consumption
State-of-the-art seeking algorithms and advanced power management features help maintain low power consumption.
Explore WD HDDs
WD Blue PC HDD | WD_BLACK PC HDD | WD Red HDD | WD Red Plus HDD | |
|
Capacity
| Avail up to 8TB | Avail up to 10TB | Avail up to 6TB | Avail up to 14TB |
|
Interface
| SATA 6 Gb/s | SATA 6 Gb/s | SATA 6 Gb/s | SATA 6 Gb/s |
|
Form Factor
| 3.5 inches | 3.5 inches | 3.5 inches | 3.5 inches |
|
RPM
| Up to 7200 | Up to 7200 | Up to 5400 | Up to 5400 |
|
Cache Memory
| Up to 256MB | Up to 64MB | Up to 64MB | Up to 64MB |
What's in the box
Product Description
WD Blue internal hard drives deliver reliability for office and web applications. They are ideal for use as primary drives in desktop PCs and for office applications. With a range of capacities and cache sizes, there’s a WD Blue internal hard drive that’s just right for you.
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Product information
Technical Details
| Brand | Western Digital |
|---|---|
| Series | WD Blue PC Hard Drive |
| Item model number | WD40EZAZ |
| Hardware Platform | PC |
| Item Weight | 4.2 ounces |
| Product Dimensions | 5.79 x 4 x 1.03 inches |
| Item Dimensions LxWxH | 5.79 x 4 x 1.03 inches |
| Color | 4TB |
| Hard Drive Interface | Serial ATA-600 |
| Hard Drive Rotational Speed | 5400 RPM |
| Batteries | 1 Lithium Ion batteries required. |
| Manufacturer | Western Digital Technologies, Inc. |
| Language | English, English, English, English, English |
| ASIN | B087QTVCHH |
| Date First Available | June 23, 2020 |
Additional Information
| Customer Reviews |
4.6 out of 5 stars |
|---|---|
| Best Sellers Rank | #152 in Internal Hard Drives |
Warranty & Support
Feedback
Product guides and documents
4 stars and above
Compare with similar items
This item Western Digital 4TB WD Blue PC Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, 256 MB Cache, 3.5" - WD40EZAZ | Western Digital 2TB WD Blue PC Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, 256 MB Cache, 3.5" - WD20EZAZ | Seagate BarraCuda 4TB Internal Hard Drive HDD – 3.5 Inch Sata 6 Gb/s 5400 RPM 256MB Cache For Computer Desktop PC – Frustration Free Packaging ST4000DMZ04/DM004 | Western Digital 4TB WD Blue PC Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, 256 MB Cache, 3.5" - WD40EZAZ (Renewed) (WD Factory Recertified) | Western Digital 2TB WD Blue Mobile Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, 128 MB Cache, 2.5" - WD20SPZX | Seagate IronWolf 4TB NAS Internal Hard Drive HDD – CMR 3.5 Inch SATA 6Gb/s 5400 RPM 64MB Cache for RAID Network Attached Storage, Rescue Services – Frustration Free Packaging (ST4000VNZ06) | |
|---|---|---|---|---|---|---|
| | | | | | ||
| Customer Rating | 4.6 out of 5 stars (53958) | 4.7 out of 5 stars (13151) | 4.7 out of 5 stars (106062) | 5.0 out of 5 stars (2) | 4.6 out of 5 stars (12260) | 4.7 out of 5 stars (24868) |
| Price | From $65.79 | $49.49$49.49 | $74.99$74.99 | $59.99$59.99 | $68.82$68.82 | $104.99$104.99 |
| Sold By | Available from these sellers | Amazon.com | Amazon.com | HardDriveGeeks (SN Recorded) | Amazon.com | Amazon.com |
| Cache Memory Installed Size | 256 | 256 | 256 | 256.0 MB | 128.00 | 64 |
| Digital Storage Capacity | 4 TB | 2 TB | 4 TB | 4000.0 GB | 2 TB | 4 TB |
| Hard Disk Rotational Speed | 5400 rpm | 5400 rpm | 5400 rpm | 5400 rpm | 5400 rpm | 5400 rpm |
| Hard Disk Size | 4 TB | 2 TB | 4 TB | 4 TB | 2 TB | 4 TB |
| Hard Disk Form Factor | 3.50 inches | 3.50 inches | 3.50 inches | 3.50 inches | 2.50 inches | 3.50 inches |
| Hardware Interface | SATA 6.0 Gb/s | SATA 6.0 Gb/s | SATA 6.0 Gb/s | SATA 6.0 Gb/s | SATA 6.0 Gb/s | SATA 6.0 Gb/s |
| Item Dimensions | 5.79 x 4 x 1.03 inches | 5.79 x 4 x 1.03 inches | 5.79 x 4 x 0.79 inches | — | 3.94 x 2.75 x 0.28 inches | 5.79 x 4.01 x 1.03 inches |
| Item Weight | 4.23 ounces | 0.99 lbs | 1.21 lbs | — | — | 1.21 lbs |
| Size | 4TB | 2TB | 4TB | — | 2TB | 4TB |
Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonReviewed in the United States on October 27, 2014
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The drives must be formatted as GPT drives so you can access the full drive capacity. If you format it as an MBR drive it will only show up as a 2 TB because that's the limitations imposed upon you by the MBR standard. Once you initialize the drive as GPT, you should format it as required. These WD Blue drives yields 7.28 TB of drive space total after it's formatted in it's entirety. Don't forget to assign a drive letter or it may not show up on your screen.
I purchased the "ORICO 3.5 USB C 3.1 Hard Drive Enclosure" for the secondary drive so I can use it as an external backup drive. It allows the WD Blue drive to work at it's maximum potential speed of 6Gbps via a 3.1 USB port. Most of the other drive enclosures operate at 3.0 speeds and would make drive backups slower than necessary on a 5640 RPM drive.
With that said, I highly recommend these WD Blue drives for passive backup storage. Don't know if you should be using these for gaming and such. There is a reason they offer a WD Black drive for such activities.
I got this drive at a good price. It worked perfectly, as I expected. I am happy with it.
My review is based on another unit of this drive which I bought for myself some months later. I've been using it as my primary desktop OS/programs drive since 5/29/2014, so it's about 5 months now. There have been no problems thus far. It's really quite a bargain for desktop use if 1TB is all you need.
The actual capacity of this drive is 931.5GB. That's an old marketing trick which can be blamed for the pointless redefinition of all our real, long established data measurements with those silly "i" characters. I won't dwell on it any further, but 931GB is the true capacity when measured in base 2, as all data is correctly measured.
This 1TB Blue drive uses a single 1TB platter spinning at 7200rpm. There are 2 heads (each side is 500GB).
A single platter design is usually better for reliability than having multiple smaller platters, because there are fewer points of failure, the assembly is lighter, the motor doesn't have to work as hard, and less heat is generated.
Single platter drives will also tend to be quieter, but due to my configuration I can't judge the noise level.
There has been much discussion and testing among users in online forums, including WD's forum, which repeatedly show that the 1TB Blue and 1TB Black perform the same. It appears the only benefit of the 1TB Black is a longer warranty. Some Blacks are faster than this drive, but the 1TB model is not.
Compared to a Green, the Blue is faster owing to it's faster rotation speed. The Green drives also have an "intellipark" feature which causes them to keep parking the heads after a few seconds of inactivity. This can cause laggy response and extra wear. I dislike that design - I believe power management functions should be left under the control of the operating system, which can account for user preferences and what is happening in the rest of the system. Hardcoding this behavior into the drive is ridiculous, in my opinion. The Blue behaves the way I prefer - it does not use "intellipark", it stays ready to roll until directed otherwise through power management commands from the OS.
I wish they were making the Blue series in larger sizes - it seems this 1TB is the end of the line. I don't care for the Greens and the Blacks are more expensive.
Partition/Sector Alignment
--------------------------------
Please be aware that like most modern drives, this drive uses 4KB sectors (also known as "advanced format"). If you are using Windows 2003, Windows XP or older, as I am, don't let Windows handle the partitioning of this drive. This is even an issue on unpatched versions of Vista and Windows 7. These older versions of Windows will believe that the physical sectors are 512 bytes, when in reality they are 4KB. As a result, the partition(s) will not be aligned with the physical sectors. It will still work, but performance will be reduced.
Windows Server 2003 and Windows XP and older do not have any update to fix this, but it's not a problem as long as you do the partitioning with a suitable 3rd party utility. I think Western Digital offers a tool for this, but I've never tried it. Once the partitions are set, it's fine to let Windows format them.
For my Windows XP install, I used a recent version of GParted to partition the drive. GParted can be downloaded and burned to a bootable CD, or installed to a USB flash drive. Just use the option to align your partition(s) on 1MB boundaries. This is the easy way to ensure they are aligned correctly for the best performance. Then boot your WinXP install disc and let it format the partition that you already created. It sounds harder than it is, it's a minor hassle but it's simple.
If you ever change the partitions, once again use GParted or a similar utility that handles alignment for modern hard disks. Don't use the built-in XP partitioning. But again, once the partitions are created, it's fine to let Windows format them.
The built-in partitioning is fixed in Windows 8.
According to Microsoft, it is fixed in Windows 7 after installing Service Pack 1 - you would need to have that service pack before partitioning the drive, not after.
Again according to Microsoft, it is also fixed in Windows Vista *after* installing update MS KB 2553708 - I assume this is automatically installed for people who use automatic updates, but I don't know that for a fact. This won't do you any good if you're doing a fresh install and your install disc predates the required update.
The partition alignment detail I've described above is an issue you will encounter with any recent hard drive, it's not unique to this model. If you ignore it, performance will be affected but it will still work. You may see Seagate drives implying that they are immune from this, but in reality, they are not. All modern "advanced format" drives, of any brand, will perform better if sectors are properly aligned. But it's not a big deal - just use a modern partitioning utility and then you're set.
----------------------
I just tested this drive using "Roadkil's Disk Speed" on Windows XP 32-bit. I'll cut out all the variables and just give the linear transfer results with large block sizes. My drive has a few partitions and there are lots of files on it, so this might affect results.
First partition (first 20GB): 170-178MB/sec linear read
3rd partition (physical location range is from 28-628GB): 153-177MB/sec linear read
Last 300GB is unpartitioned so I can't test that range.
I don't think the random access test is useful, because my partitioning greatly influences the result.
There's a test mode for the whole physical disk, but it's results are too inconsistent.
This drive is a great bargain if you just need a simple, inexpensive, well performing 7200rpm hard disk. I was tempted to try a Seagate SSHD, but I couldn't justify the cost compared to this. If I was shopping today, I'd look carefully at the HGST and Toshiba offerings as well, but from the WD side this is my pick for a general purpose 1TB desktop drive.
Update: It is now 11/2015. This drive is in my desktop PC, used daily, and still works fine.
Some months ago I ran a benchmark on this drive using the linux utility "gnome-disks". The random access performance measured out to a 15.7ms average. This is mediocre, but expected from a quiet drive. Screenshot is attached. It also shows the transfer rate across the disk (read test only, I didn't test writes).
Reviewed in the United States on October 27, 2014
My review is based on another unit of this drive which I bought for myself some months later. I've been using it as my primary desktop OS/programs drive since 5/29/2014, so it's about 5 months now. There have been no problems thus far. It's really quite a bargain for desktop use if 1TB is all you need.
The actual capacity of this drive is 931.5GB. That's an old marketing trick which can be blamed for the pointless redefinition of all our real, long established data measurements with those silly "i" characters. I won't dwell on it any further, but 931GB is the true capacity when measured in base 2, as all data is correctly measured.
This 1TB Blue drive uses a single 1TB platter spinning at 7200rpm. There are 2 heads (each side is 500GB).
A single platter design is usually better for reliability than having multiple smaller platters, because there are fewer points of failure, the assembly is lighter, the motor doesn't have to work as hard, and less heat is generated.
Single platter drives will also tend to be quieter, but due to my configuration I can't judge the noise level.
There has been much discussion and testing among users in online forums, including WD's forum, which repeatedly show that the 1TB Blue and 1TB Black perform the same. It appears the only benefit of the 1TB Black is a longer warranty. Some Blacks are faster than this drive, but the 1TB model is not.
Compared to a Green, the Blue is faster owing to it's faster rotation speed. The Green drives also have an "intellipark" feature which causes them to keep parking the heads after a few seconds of inactivity. This can cause laggy response and extra wear. I dislike that design - I believe power management functions should be left under the control of the operating system, which can account for user preferences and what is happening in the rest of the system. Hardcoding this behavior into the drive is ridiculous, in my opinion. The Blue behaves the way I prefer - it does not use "intellipark", it stays ready to roll until directed otherwise through power management commands from the OS.
I wish they were making the Blue series in larger sizes - it seems this 1TB is the end of the line. I don't care for the Greens and the Blacks are more expensive.
Partition/Sector Alignment
--------------------------------
Please be aware that like most modern drives, this drive uses 4KB sectors (also known as "advanced format"). If you are using Windows 2003, Windows XP or older, as I am, don't let Windows handle the partitioning of this drive. This is even an issue on unpatched versions of Vista and Windows 7. These older versions of Windows will believe that the physical sectors are 512 bytes, when in reality they are 4KB. As a result, the partition(s) will not be aligned with the physical sectors. It will still work, but performance will be reduced.
Windows Server 2003 and Windows XP and older do not have any update to fix this, but it's not a problem as long as you do the partitioning with a suitable 3rd party utility. I think Western Digital offers a tool for this, but I've never tried it. Once the partitions are set, it's fine to let Windows format them.
For my Windows XP install, I used a recent version of GParted to partition the drive. GParted can be downloaded and burned to a bootable CD, or installed to a USB flash drive. Just use the option to align your partition(s) on 1MB boundaries. This is the easy way to ensure they are aligned correctly for the best performance. Then boot your WinXP install disc and let it format the partition that you already created. It sounds harder than it is, it's a minor hassle but it's simple.
If you ever change the partitions, once again use GParted or a similar utility that handles alignment for modern hard disks. Don't use the built-in XP partitioning. But again, once the partitions are created, it's fine to let Windows format them.
The built-in partitioning is fixed in Windows 8.
According to Microsoft, it is fixed in Windows 7 after installing Service Pack 1 - you would need to have that service pack before partitioning the drive, not after.
Again according to Microsoft, it is also fixed in Windows Vista *after* installing update MS KB 2553708 - I assume this is automatically installed for people who use automatic updates, but I don't know that for a fact. This won't do you any good if you're doing a fresh install and your install disc predates the required update.
The partition alignment detail I've described above is an issue you will encounter with any recent hard drive, it's not unique to this model. If you ignore it, performance will be affected but it will still work. You may see Seagate drives implying that they are immune from this, but in reality, they are not. All modern "advanced format" drives, of any brand, will perform better if sectors are properly aligned. But it's not a big deal - just use a modern partitioning utility and then you're set.
----------------------
I just tested this drive using "Roadkil's Disk Speed" on Windows XP 32-bit. I'll cut out all the variables and just give the linear transfer results with large block sizes. My drive has a few partitions and there are lots of files on it, so this might affect results.
First partition (first 20GB): 170-178MB/sec linear read
3rd partition (physical location range is from 28-628GB): 153-177MB/sec linear read
Last 300GB is unpartitioned so I can't test that range.
I don't think the random access test is useful, because my partitioning greatly influences the result.
There's a test mode for the whole physical disk, but it's results are too inconsistent.
This drive is a great bargain if you just need a simple, inexpensive, well performing 7200rpm hard disk. I was tempted to try a Seagate SSHD, but I couldn't justify the cost compared to this. If I was shopping today, I'd look carefully at the HGST and Toshiba offerings as well, but from the WD side this is my pick for a general purpose 1TB desktop drive.
Update: It is now 11/2015. This drive is in my desktop PC, used daily, and still works fine.
Some months ago I ran a benchmark on this drive using the linux utility "gnome-disks". The random access performance measured out to a 15.7ms average. This is mediocre, but expected from a quiet drive. Screenshot is attached. It also shows the transfer rate across the disk (read test only, I didn't test writes).
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