Power Your NAS with WD Red There's a WD Red drive for every compatible NAS system to help fulfill your data storage needs. Built for single-bay to 8-bay NAS systems, WD Red packs the power to store your precious data in one powerhouse unit. With WD Red, you're ready for what's next. WD Red for Personal or Home Office Stream, backup, share, and organize your digital content at home with a NAS and WD Red drives designed to effortlessly share content with the devices in your personal or home office environments. NASware 3.0 technology increases your drives' compatibility with your existing network and devices, TV, stereo, and more. Live in a connected world. Exclusive NASware 3.0 Not just any drive will do. Get up to 48TB of capacity in your 8-bay system and with WD's exclusive NASware 3.0 technology, you can optimize each and every drive. Built into every WD Red hard drive, NASware 3.0's advanced technology improves your system's storage performance by increasing compatibility, integration, upgradeability, and reliability.
Power Your NAS with WD Red There's a WD Red drive for every compatible NAS system to help fulfill your data storage needs. Built for single-bay to 8-bay NAS systems, WD Red packs the power to store your precious data in one powerhouse unit. With WD Red, you're ready for what's next. WD Red for Personal or Home Office Stream, backup, share, and organize your digital content at home with a NAS and WD Red drives designed to effortlessly share content with the devices in your personal or home office environments. NASware 3.0 technology increases your drives' compatibility with your existing network and devices, TV, stereo, and more. Live in a connected world. Exclusive NASware 3.0 Not just any drive will do. Get up to 48TB of capacity in your 8-bay system and with WD's exclusive NASware 3.0 technology, you can optimize each and every drive. Built into every WD Red hard drive, NASware 3.0's advanced technology improves your system's storage performance by increasing compatibility, integration, upgradeability, and reliability.
in 9 offers
Power Your NAS with WD Red There's a WD Red drive for every compatible NAS system to help fulfill your data storage needs. Built for single-bay to 8-bay NAS systems, WD Red packs the power to store your precious data in one powerhouse unit. With WD Red, you're ready for what's next. WD Red for Personal or Home Office Stream, backup, share, and organize your digital content at home with a NAS and WD Red drives designed to effortlessly share content with the devices in your personal or home office environments. NASware 3.0 technology increases your drives' compatibility with your existing network and devices, TV, stereo, and more. Live in a connected world. Exclusive NASware 3.0 Not just any drive will do. Get up to 48TB of capacity in your 8-bay system and with WD's exclusive NASware 3.0 technology, you can optimize each and every drive. Built into every WD Red hard drive, NASware 3.0's advanced technology improves your system's storage performance by increasing compatibility, integration, upgradeability, and reliability.
Power Your NAS with WD Red There's a WD Red drive for every compatible NAS system to help fulfill your data storage needs. Built for single-bay to 8-bay NAS systems, WD Red packs the power to store your precious data in one powerhouse unit. With WD Red, you're ready for what's next. WD Red for Personal or Home Office Stream, backup, share, and organize your digital content at home with a NAS and WD Red drives designed to effortlessly share content with the devices in your personal or home office environments. NASware 3.0 technology increases your drives' compatibility with your existing network and devices, TV, stereo, and more. Live in a connected world. Exclusive NASware 3.0 Not just any drive will do. Get up to 48TB of capacity in your 8-bay system and with WD's exclusive NASware 3.0 technology, you can optimize each and every drive. Built into every WD Red hard drive, NASware 3.0's advanced technology improves your system's storage performance by increasing compatibility, integration, upgradeability, and reliability.
Last updated at 10/05/2026 19:46:37
Wd40efax Hard Drive Wd40efax-68jh4n1 4tb 6GB/S 3.5" SATA Wd Red HDD
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Western Digital Wd40efax Red 3.5" 4tb Sata 256mb Cache Internal
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Western Digital Red 4tb Wd40efax 256mb Sata 3.5" Internal Hdd Hard
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Western Digital Red Plus Wd40efpx/wd40efzx 4tb 3.5" Sata Hard Drive
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Wd40efpx Western Digital Wd Red 4tb 5400 Rpm Sata Iii 256 Mb 3.5''
Delivery $45.49
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Western Digital Wd Red 4tb Internal Hard Disk Hdd 3.5" Sata 5400rpm
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Wd40efax-68jh4n1 S/n: Wx12d8 Nov / 2020 Thailand 4tb Sata 3.5" Western
Delivery $75.74
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Western Digital Red Internal hard drive 3.5" 4 TB Serial ATA III
Wd Red 4 Tb 3.5 Inch Nas Internal Hard Drive 5400 Rpm Wd40 Efax
Delivery between 17–20 May $29
originally posted on newegg.com
Bought 4x 4TB drives for a second RAID5 on a LSI 8 ports pro grade RAID card. My first array of drives were CMR drives and didn't know about the SMR scandal & technology. The write speeds were not great on my CMR models, but it was not that bad compared to the abysmal performance I have on my new array with SMR models. This is a terrible product, do not buy this. I bought them without checking fine prints, it's my fault. But this will be the last time I give money to Western Digital. You should fire your head of Marketing for allowing this gimmick to happen, if it's not already the case.
originally posted on westerndigital.com
Although these drive are labeled NASware 3.0 I found out after I received the drives that they use SMR technology. I intended to use the drives to increase the storage on my ReadyNAS. but in speaking to a Netgear representative he recommended against using SMR technology because they had found them troublesome for writing large files or many files continuously, and especially on RAID sync, scrub, and balance. I researched the drives further and found this was indeed the case. By this time I had already hot swapped one of the drives I'd purchased in anticipation of increasing the storage and upgrading the OS. As part of the upgrade the raid did a resync. The resync took 5 days to complete. This is exactly one of the situations I'd been cautioned about and had seen ... MoreAlthough these drive are labeled NASware 3.0 I found out after I received the drives that they use SMR technology. I intended to use the drives to increase the storage on my ReadyNAS. but in speaking to a Netgear representative he recommended against using SMR technology because they had found them troublesome for writing large files or many files continuously, and especially on RAID sync, scrub, and balance. I researched the drives further and found this was indeed the case. By this time I had already hot swapped one of the drives I'd purchased in anticipation of increasing the storage and upgrading the OS. As part of the upgrade the raid did a resync. The resync took 5 days to complete. This is exactly one of the situations I'd been cautioned about and had seen reported on the internet. In the past my resyncs have completed overnight so I find 5 days unacceptable. In short I don't have confidence in the reliability of SMR drives for my NAS. I requested an RMA be generated to exchange the drives I purchased for the CMR drives I thought I was getting but it's been 2 weeks and I'm still waiting.
originally posted on scan.co.uk
Bought for use in a Synology DS920+ NAS. I am using four of these 4TB drives in SHR. I have used these drives in many NAS devices are they are the quietest drives I have found which can be important if you sit anywhere near your NAS.Good value for money and have found them to be extremely reliable. Not much else you can say about a NAS HDD really; you plug them in and leave them.
| General | |
| Device Type | Hard drive - internal |
| Capacity | 4 TB |
| Form Factor | 3.5" |
| Interface | SATA 6Gb/s |
Wd40efax Hard Drive Wd40efax-68jh4n1 4tb 6GB/S 3.5" SATA Wd Red HDD
Free delivery
Western Digital Wd40efax Red 3.5" 4tb Sata 256mb Cache Internal
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Western Digital Red 4tb Wd40efax 256mb Sata 3.5" Internal Hdd Hard
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Western Digital Red Plus Wd40efpx/wd40efzx 4tb 3.5" Sata Hard Drive
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Wd40efpx Western Digital Wd Red 4tb 5400 Rpm Sata Iii 256 Mb 3.5''
Delivery $45.49
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Bought 4x 4TB drives for a second RAID5 on a LSI 8 ports pro grade RAID card. My first array of drives were CMR drives and didn't know about the SMR scandal & technology. The write speeds were not great on my CMR models, but it was not that bad compared to the abysmal performance I have on my new array with SMR models. This is a terrible product, do not buy this. I bought them without checking fine prints, it's my fault. But this will be the last time I give money to Western Digital. You should fire your head of Marketing for allowing this gimmick to happen, if it's not already the case.
Although these drive are labeled NASware 3.0 I found out after I received the drives that they use SMR technology. I intended to use the drives to increase the storage on my ReadyNAS. but in speaking to a Netgear representative he recommended against using SMR technology because they had found them troublesome for writing large files or many files continuously, and especially on RAID sync, scrub, and balance. I researched the drives further and found this was indeed the case. By this time I had already hot swapped one of the drives I'd purchased in anticipation of increasing the storage and upgrading the OS. As part of the upgrade the raid did a resync. The resync took 5 days to complete. This is exactly one of the situations I'd been cautioned about and had seen ... MoreAlthough these drive are labeled NASware 3.0 I found out after I received the drives that they use SMR technology. I intended to use the drives to increase the storage on my ReadyNAS. but in speaking to a Netgear representative he recommended against using SMR technology because they had found them troublesome for writing large files or many files continuously, and especially on RAID sync, scrub, and balance. I researched the drives further and found this was indeed the case. By this time I had already hot swapped one of the drives I'd purchased in anticipation of increasing the storage and upgrading the OS. As part of the upgrade the raid did a resync. The resync took 5 days to complete. This is exactly one of the situations I'd been cautioned about and had seen reported on the internet. In the past my resyncs have completed overnight so I find 5 days unacceptable. In short I don't have confidence in the reliability of SMR drives for my NAS. I requested an RMA be generated to exchange the drives I purchased for the CMR drives I thought I was getting but it's been 2 weeks and I'm still waiting.
Bought for use in a Synology DS920+ NAS. I am using four of these 4TB drives in SHR. I have used these drives in many NAS devices are they are the quietest drives I have found which can be important if you sit anywhere near your NAS.Good value for money and have found them to be extremely reliable. Not much else you can say about a NAS HDD really; you plug them in and leave them.
Bought a couple of these for a new NAS; not the cheapest drives in town, but hopefully they will be reliable. ( I've had 2 others in another NAS for 3+ years now without a wobble, so here's hoping). They've been installed for a couple of weeks now: quiet and appear to be doing OK, no burn-in errors showing up.Thanks again to SCAN for competitive pricing and super quick delivery.
I've been using WD Red drives in my 5 bay Drobo NAS appliance for many years. I recently decided to up my capacity by replacing a 2TB drive with a larger 4TB drive. I went to NewEgg and grabbed this item thinking it was the same as the 4TB drive I bought just over a year ago. I was unaware that, in early 2020, WD did a major redesign on this product by changing the data recording scheme from "CMR" (Conventional Magnetic Recording) to the more dense "SMR" (Shingled Magnetic Recording). That change gives WD the potential to produce the drive cheaper but it also introduces complications when writing data. The result is a drive that has slower write performance than the "CMR" version. WD added caching mechanisms to try to smooth the write performance, but that cache can ... MoreI've been using WD Red drives in my 5 bay Drobo NAS appliance for many years. I recently decided to up my capacity by replacing a 2TB drive with a larger 4TB drive. I went to NewEgg and grabbed this item thinking it was the same as the 4TB drive I bought just over a year ago. I was unaware that, in early 2020, WD did a major redesign on this product by changing the data recording scheme from "CMR" (Conventional Magnetic Recording) to the more dense "SMR" (Shingled Magnetic Recording). That change gives WD the potential to produce the drive cheaper but it also introduces complications when writing data. The result is a drive that has slower write performance than the "CMR" version. WD added caching mechanisms to try to smooth the write performance, but that cache can apparently be filled when writing large files or high volumes of data. All my crashes seem to have occurred when trying to perform a full system backup on one of my networked machines. After the third crash I went online and discovered numerous postings by others who have also had issues with the new "SMR" drives. It took some time before WD finally admitted they had made this change and published documents saying which drive models were affected. (If you've ever wondered what the difference is between the "WD Red" and "WD Red Plus" lines are; for drives between 2TB and 6TB, the "Red" line uses "SMR" and the "Red Plus" line retains the old "CMR". Now you have to pay the premium "Plus" price to get the same drive you used to get as standard!) Online discussions showed many others have had problems with these "SMR" drives in raid configurations. For some time, WD appeared to try to explain away these problems. They ultimately announced that they had made this change and indicated that they still stand behind this product for use in NAS arrays. This definitely shakes my confidence in WD as a reliable source. If I had known all this before I ordered, I would have purchased the "Red Plus" version of the drive. Better still, I would have bought a different brand that is more upfront about the way it treats customers. Meanwhile, I'm stuck with a 4TB doorstop. Maybe I can use it for archival storage?
All 3 of these drives that I have purchased (within 2 years) have failed. The last "operating" drive only reads at about 5 MB/s, which is sad. They all make a "chirping" sound at random, which is the motor powering up and down. Not buying another one of these drives. Not worth it. 3 of 3 basically bad hard drives. I would only rate these as fair because the motors have not completely given up, but the chirping and slow reads are only getting worse with time.
I use(d) WD for a very long time and relied on the fact I never had issues with any of these drives. Until I purchased WD Red 6T for a NAS. I learned WD is very unclear about the fact this drive should not even be used for a NAS (unless maybe single drive but one cannot call that a real NAS). Anyone who has some experience with NAS will put those in RAID mode and this drive is a nightmare when used in RAID.
I purchased the Red 6TB drive as a replacement drive for by 5-bay Drobo connected to our home Mac server, and used for storing Time Machine backups for our 5 computers. The Drobo has only WD Red drives purchased over the past years, gradually swapping in larger Red drives as old ones fail or I needed increased storage space. This is probably at least the 10th Red drive I have swapped in to our Drobo. As soon as I swapped in this drive I noticed it wasn't as usual. The Drobo would unmount and re-mount repeatedly during the RAID rebuild phase. When it was done rebuilding I tested it out by running a Time Machine backup, which should do an incremental change to a sparse bundle file. I noticed that the entire sparsebundle file (1.7TB) was reduced to zero bytes and the ... MoreI purchased the Red 6TB drive as a replacement drive for by 5-bay Drobo connected to our home Mac server, and used for storing Time Machine backups for our 5 computers. The Drobo has only WD Red drives purchased over the past years, gradually swapping in larger Red drives as old ones fail or I needed increased storage space. This is probably at least the 10th Red drive I have swapped in to our Drobo. As soon as I swapped in this drive I noticed it wasn't as usual. The Drobo would unmount and re-mount repeatedly during the RAID rebuild phase. When it was done rebuilding I tested it out by running a Time Machine backup, which should do an incremental change to a sparse bundle file. I noticed that the entire sparsebundle file (1.7TB) was reduced to zero bytes and the backup software prompted to perform a "first backup", i.e. the historical changes were lost. I then noticed that this was the case also for all backup sets for the four other computers in our home. I now realize that the Red drive I purchased uses SMR instead of CMR and that these new Red drives don't appear to be suitable at all for our purpose. I can see that this information is on the website but how can WD make such a significant change to a product line and keep its name? Apparently, the Red is now named Red Plus but that was not obvious at all. I cannot believe how the good people at WD could allow this to happen. This is probably a decent standalone drive but it should not have been allowed to drag the Red (NAS/RAID) product line in the dirt. I am devastated, sad and angry with myself for trusting the product name so deeply that I didn't do research. And I am angry with WD for betraying that trust.
WD40EFAX drive is a great drive for 24x7 operation in NAS systems. I have owned a WD MyCloud EX4100 (4-bay) NAS for about 5 years now and have only had one drive degrade to the point I needed to replace one disk. After replacing the faulty drive the NAS rebuilt the RAID configuration and I never lost any data. I subsequently purchased a spare WD40EFAX drive in case of another failure.I highly recommend these drive. They are extremely reliable in constant operations.
I bought two of these to put in a dual-drive NAS. They work great for my needs. I only use to NAS for backup purposes, not as primary storage. Otherwise I would go with the WD Red Plus because it uses CMR write technology rather than SMR like the WD Red. You can google CMR and SMR for more info on why that makes a difference.I ordered these directly from Western Digital and the shipping was super fast.
| General | |
| Device Type | Hard drive - internal |
| Capacity | 4 TB |
| Form Factor | 3.5" |
| Interface | SATA 6Gb/s |
