Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD42PURZ
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Monday, Jun 30
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Capacity: 256 MB Cache
Style: 4TB
Pattern Name: Hard Drive HDD
Features
- Engineered specifically for mainstream surveillance systems.
- AllFrame technology delivers optimizations for write-intensive, low bit-rate, high stream-count workloads typical to mainstream surveillance applications.
- Supports up to 180 TB/yr workload rate2. | 2Workload Rate is defined as the amount of user data transferred to or from the hard drive. Workload Rate is annualized (TB transferred (8760 / recorded power-on hours)). Workload Rate will vary depending on your hardware and software components and configurations.
- 1TB1 through 3TB support up to eight bays; 4TB and above support up to 16 bays and employ tarnish-resistant components for harsher environments.
- 1As used for storage capacity, 1TB = one trillion bytes. Actual user capacity may be less, depending on operating environment.
Description
The Right Drive for the Right Job. WD Purple drives are engineered specifically for surveillance to help withstand the elevated heat fluctuations and equipment vibrations within NVR environments. An average desktop drive is built to run for only short intervals, not the harsh 24/7 always-on environment of a high-definition surveillance system. With WD Purple, you get reliable, surveillance-class storage that’s tested for compatibility in a wide range of security systems, and some of our latest models (WD22PURZ, WD42PURZ, and WD63PURZ) have improved power efficiency. Exclusive AllFrame technology helps reduce frame loss and improve overall video playback.
RAM: 512 GB
Hard Drive: 4 TB Mechanical Hard Disk
Brand: Western Digital
Series: Purple HDD
Item model number: WD42PURZ
Hardware Platform: PC
Item Weight: 1.26 pounds
Product Dimensions: 5.79 x 4 x 1.03 inches
Item Dimensions LxWxH: 5.79 x 4 x 1.03 inches
Color: Purple
Flash Memory Size: 4
Hard Drive Interface: Serial ATA
Manufacturer: Western Digital Technologies, Inc.
Language: English, English
Country of Origin: Thailand
Date First Available: December 15, 2021
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, Jun 30
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Similar Products
Top Amazon Reviews
Capacity: 256 MB Cache
Style: 4TB
Pattern Name: Hard Drive HDD
Because of reviews from buyers complaining that the drive they received wasn't new, or was packaged carelessly, I give you my comments. This review is specifically about a 4TB WD Purple WDPURZ 3.5" drive "designed for 24 x 7 systems" and sold and delivered by Amazon. It was made in Thailand in August 2022, four months ago. It was in a pristine anti-static bag, sealed, with a desiccant pouch inside. The drive was supported by a plastic anti-shock "nest" at two sides that isolated it well, inside a strong cardboard box. This is a very common apparatus I see when I buy new drives. I suspect it's engineered to guarantee that no matter who does what with the package, the drive will never be disturbed. I can't say anything about the working of the drive; we all know there's a very high probability it will work perfectly and last a long time, and that prediction will apply to the one you buy too, even if I get incredibly unlucky and mine bursts into flame the moment I plug it in.
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Reviewed in the United States 🇺🇸 on December 17, 2022 by j t axline
Capacity: 256 MB Cache
Style: 2TB
Pattern Name: Hard Drive HDD
Wanted to store surveillance videos for a longer time frame, so replaced the original 500GB drive in an old Samsung SDS-P3042 with this Western Digital 2TB. Can now store videos for one month instead of 9 days. The original hard drive was still going strong after 7 years running 24/7, so hope this new one will last at least as long.
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Reviewed in the United States 🇺🇸 on January 30, 2023 by Scrapbooker
Capacity: 64 MB Cache
Style: 4TB
Pattern Name: Hard Drive HDD
Before reading any review read this: there is a key problem with the way this section is set up. For some reason it lists a very old (2014) model of this drive along with the same New Generation improved model. What makes that bad is that the user comments are both mixed together, so any problems with the original drive appear right on top of the list and may be misleading. It’s very important then to look at the tiny print at the top of each comment and see if the user is talking about the Old Generation style or the New Generation style. To be clear, I am talking about the improved New Generation style. If you are not already familiar with the difference between a general purpose hard drive and one designed for video security let me start with a very basic comparison. This comparison is very broad and not a textbook definition by any means. HOW IT WORKS Computers write and read their information to a hard drive in tiny chunks that are scattered randomly all over the disk, so the recording/playback heads are constantly jumping from place to place. Speed of access in a computer is extremely important. On the other hand video surveillance recorders write and read their information more like an old-fashioned tape recorder, pretty much just like what the cameras are seeing in real time. The recording/playback heads are only required to jump to another spot on the disk when you want to play back an event. So random-access search time is far less of a priority than the non-stop grunt work of recording dependably 24/7/365 without a hiccup. The two processes are entirely different job tasks. COMPARISON: BRAND A VS. BRAND B There are two major brands of specialized video surveillance hard drives. My NVR is one of the most respected out there for users who have a lot of experience and they chose to use the other brand of hard drive. Kudos to them because many other video security manufacturers believe you’ll never know what’s inside so they install the cheapest no-name generic hard drive they can buy. I’ve been buying this brand of security system for years and have been very happy with it and when I wanted to increase my drive capacity from 2TB to 4TB I had no idea if switching to a WD brand drive would make any difference at all. Engineers told me that the two brands are not identical in their design philosophy, each brand considering certain design parameters to be the slightly better way to go. IS THERE A DIFFERENCE Because the NVR software, firmware and other factors play at least as much of a role in performance as the hard drive I was looking to improve these things: 1. Drive noise 2. Drive heat 3. Stuttering (when the image suddenly jumps or drops a few frames, usually on playback) I measured the operating temperature both drives in real-life use in identical conditions using a precision instrument. The original drive was operating at 97.7 F and the WD measured at 91.6 F. That 6 degree difference is significant but not substantial. Likewise I used a calibrated sound level meter for each drive. The original drive came in at 47 dBA. The WD was at 46.9 dBA, virtually identical. The last condition is more difficult to quantify because stuttering is sporadic, so in my opinion I would classify any differences in a typical use scenario as atypical, was I experiencing fewer or more instances of stuttering or about the same? I tried to make my comparison without prejudice for or against either brand because I really don’t care whose name is on it. I bought the WD primarily to double my recording capacity and hence the number of days it would record events. That being said in real-life everyday use I have to lean slightly toward the WD as having fewer instances of jumping, stuttering or frame dropping in my particular system and it does seem to handle a few second backspace more smoothly than the original drive. Maybe another way of putting it is that the WD seems to be playing nicer with the NVR’s software/firmware than the brand the manufacturer originally spec’d. WILL IT IMPROVE MY SECURITY SYSTEM The short answer is not really. Any differences in operating temperature and noise level are too close to be significant and both brands are optimized for video security so abnormalities like stuttering are just that, and are not completely attributable to the hard drive. We can say categorically that the brand or type of hard drive you use will not improve the image resolution (picture quality) of your system. BOTTOM LINE SATISFACTION All things considered the WD is consistently a few bucks more than the other brand and I’m not a big fan of ever paying more if I don’t have to. So based on the few things I could measure and one that I could only perceive I have to say I do like this drive and I believe I made the right choice.
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Reviewed in the United States 🇺🇸 on September 26, 2017 by PhotoGraphics PhotoGraphics
Capacity: 64 MB Cache
Style: 4TB
Pattern Name: Hard Drive HDD
Purchased on the advice of my IT computer expert. I bought, he installed. We're both happy
Reviewed in the United States 🇺🇸 on February 9, 2023 by Susan Crawford
Capacity: 256 MB Cache
Style: 4TB
Pattern Name: Hard Drive HDD
It feels like my system is running smoother faster and obviously more storage I think it was worth the upgrade especially considering how much you invest in your camera system!!
Reviewed in the United States 🇺🇸 on January 28, 2023 by George
Capacity: 256 MB Cache
Style: 2TB
Pattern Name: Hard Drive HDD
Wouldn't get any other HDD for my CCTV.
Reviewed in the United States 🇺🇸 on February 11, 2023 by Roger
Capacity: 64 MB Cache
Style: 1TB
Pattern Name: Hard Drive HDD
Easy install into nvr
Reviewed in the United States 🇺🇸 on February 6, 2023 by Amazon Customer
Capacity: 256 MB Cache
Style: 4TB
Pattern Name: Hard Drive HDD
Works in my harbor freight 4K NVR surveillance system.
Reviewed in the United States 🇺🇸 on February 2, 2023 by Amazon5500