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WD 1TB Purple Surveillance Hard Drive - WD10PURZ
- WD Purple surveillance storage is built to handle up to 64 cameras per drive and is designed for 24/7, always on, high-definition surveillance security systems
- Engineered specifically for surveillance security systems
- Tuned for write-intensive, low bit-rate, high stream-count applications typical to most surveillance applications
- Prioritized write-operations for maximized surveillance performance
- TLER & ATA streaming support
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From the manufacturer
WD Purple Surveillance Hard Disk Drive
Built for 24/7, always-on, high-definition security systems. With a supported workload rate of up to 180 TB/yr and support for up to 64 cameras, WD Purple drives are optimized for surveillance systems.
AllFrame 4KTM Technology
- Reduces frame loss
- Improves video playback
- Optimizes the HDD to thrive in high temperature, always-on, surveillance system environments
Engineered for compatibility
WD Purple surveillance hard drives are built for compatibility with chassis and chip set manufacturers for seamless integration into your new or existing video surveillance system.
Optimized performance for up to 64 cameras
With support for up to 64 surveillance cameras per hard drive, WD Purple gives you the flexibility to upgrade and expand your security system in the future.
Surveillance storage for peace-of-mind
WD Purple Surveillance hard drives are designed for high temperature, always-on, surveillance security systems to help ensure reliability and quality video play back when you need it most.
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Most helpful customer reviews on Amazon.com
The drive is very quiet compared to many other drives. There is no loud clicking noises, or audible spin up sounds. I have some WD RED drives next to this system for network storage, and this drive is significantly quieter than those. I also have some Seagate NAS drives, but they are so loud I can't even use them in a living space.
Anyhow, this is a great drive. It was installed in a generic low cost Network Video Recorder (Hisilicon Hi3520D) and it runs fine. Most low to middle end DVR/NVR systems use this chip family and the same software, so this should be compatible with them all. The drive has been saving 4x 1080p streams 24/7, and it has done fine so far through 8TB+ of looped writes over the past few weeks.
The drive does run quite hot in a small enclosure, and most NVR systems do not have good ventilation. To fix this, I just bolted a 140mm fan to the top of the recorder after cutting a hole. This keeps the drive running around 30-40c instead of 60-80, as well as provides cooling to the NVRs processor (which was crazy hot and didn't even come with a heat sink). Most NVRs have a dedicated 12v connector for an optional fan, but if they don't you can always get power from the 12v barrel connector or the 4 pin HDD connector.
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.
Update - another failure. Tried to open a support case with WD about this and it has been over a week with no reply. Changing my rating to two stars.
The manufacturer WD will replace the harddrive. WD asked me to send the damaged HD back. I have a huge concern about the private data. WD does not follow the industrial standard to handle the custom data. The only way to ensure the safety of custom data is physically destroy the HD by shreddering it into dust.
Removing, rewriting (repeatedly overwrite), degussing are not industrial standard of handling custom data in the old drive! Most of the HD manufacturer will refurb the HD. That is the bad practice. Experts can recover the old data easily.
Remember, this is a low RPM drive, so backing up footage might be slow, but allows the drive to last much longer.