NV41AI-8P-4K HDD Recommendation

WD Purple drives are the gold standard.

Buy as big as you can afford. I'm currently running dual 8TB drives in my 5216
 
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machineage said:
Thank you @bigredfish

Would a 10TB drive be a good start for my system?

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Many NVR users prefer to use 2 smaller drives instead of 1 large drive and allocate camera video footage to different drives (when possible) so that you don't lose ALL camera recordings due to a catastrophic drive failure or issue. You don't get as much storage per dollar but you get the advantage mentioned above....your choice. :cool:
 
Thanks @TonyR!

The NVR only has one SATA port, so I assumed this means I can only attach one drive?

Looking at the WD Purple drives, it looks like the standard drives spin at 5400rpm, and the Purple Pro drives spin at 7200rpm? They are also available with 256Mb or 512Mb. Do you know which specs should I be choosing?

Thanks again :)
 
machineage said:
Thanks @TonyR!

The NVR only has one SATA port, so I assumed this means I can only attach one drive?

Looking at the WD Purple drives, it looks like the standard drives spin at 5400rpm, and the Purple Pro drives spin at 7200rpm? They are also available with 256Mb or 512Mb. Do you know which specs should I be choosing?

Thanks again :)
Click to expand...
I always choose the 5400rpm drives over the 7200rpm drives, as they run cooler and are less prone to failure.
 
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^^^
This
 
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machineage said:
Thanks @TonyR!

The NVR only has one SATA port, so I assumed this means I can only attach one drive?

Looking at the WD Purple drives, it looks like the standard drives spin at 5400rpm, and the Purple Pro drives spin at 7200rpm? They are also available with 256Mb or 512Mb. Do you know which specs should I be choosing?

Thanks again :)
Click to expand...
If there's no second SATA connector on the M/B that just needs a cable then go for that single 10TB or larger that does not exceed the max allowed by the mfg. :cool:
 
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I wanna say Max is like 20TB?
 
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Thanks for the replies.

I can't find a WD Purple in the UK larger than 8TB that spins at 5400rpm, (5640rpm for the 8TB). All the larger capacity drives are 7200rpm.
 
Most of the higher capacity drives I have seen spin faster. This is due to the fact that most often the larger drives are on recorders that have more cameras. Depending on the resolution of the camera, the hard drive needs to have a high enough throughput to support all the data stream (video) to be recorded. I haven't noticed any issues with going with a drive that spins at the faster RPM. They will be all pretty much the same as far as reliability within a certain brand. I usually use WD Purple and Purple Pros. Where I work, we go through pallets of WD Purple drives a month and maybe get a couple drives coming back and not really any particular speed or size so I can't really say a certain size or speed should be avoided. Longevity of the drive usually depends on how you run your system. Couple things to look at...

  • How many days of recording total for all the cameras?
  • Resolution of the cameras?
  • Amount of "AI" or detection used (metadata)
  • Environment where the drive will be used

Knowing this then will need to and can calculate roughly how much bandwidth is needed to support all the video and metadata. Then look at the specs for the drive and make sure the throughput is within spec. Leave a good amount of throughput spec-wise as a buffer. For example... If your combined camera data will use 175 MBps then don't get a hard drive that will only do 175 MBps. Ideally you want to only use up to 80% of the throughput. If the drive is not running 100% 24 hours a day, seven days a week then it will last longer. The drive will also stay cooler as heat kills electronics.
 
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@lewic Thank you for your reply.

To answer your questions as best I can:
  • I was thinking 7 days recording might be enough. I around most of the time, and if I'm away, it's usually for around 6 days max.
  • The cameras I will be installing are 2 x IPC-T54IR-ZE S3 and 1 x IPC-B54IR-ZE. I may add another one or two of the same / similar cameras at some point in the future.
  • I'm unsure about the amount of detection or metadata at this stage, I'm a total newby alas, and I have no idea what level of detection I will need, or how it will affect storage capacity.
  • The NVR will be located in a habitable space, with normal ambient room temperature
How would I go about making a rough calculation to determine what size drive may be suitable? I don't mind a drive suitable for just the three cameras at this stage, I can always swap it out in the future should I add more cameras.
 
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machineage said:
@lewic Thank you for your reply.

To answer your questions as best I can:
  • I was thinking 7 days recording might be enough. I around most of the time, and if I'm away, it's usually for around 6 days max.
  • The cameras I will be installing are 2 x IPC-T54IR-ZE S3 and 1 x IPC-B54IR-ZE. I may add another one or two of the same / similar cameras at some point in the future.
  • I'm unsure about the amount of detection or metadata at this stage, I'm a total newby alas, and I have no idea what level of detection I will need, or how it will affect storage capacity.
  • The NVR will be located in a habitable space, with normal ambient room temperature
How would I go about making a rough calculation to determine what size drive may be suitable? I don't mind a drive suitable for just the three cameras at this stage, I can always swap it out in the future should I add more cameras.
Click to expand...
Here is a rough calculation going by the three 4MP cameras you have.
1734644858885.png
The numbers could go up or down depending on the max bitrate, bitrate type (variable or constant), frames per second and the detections used (metadata). I would say go with at least a 2TB hard drive. If it was me I would go up to a 4TB as you did mention that you may add cameras in the future and that there is only one hard drive spot in the recorder. That way you have more room to grow. Having a larger hard drive doesn't really use more power or anything. But at least go with a larger hard drive so don't need to spend more to replace a drive in the future.
 
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Thank you @TonyR and @lewic :)

That's a lot less storage than I had in my uninformed mind. I may well go for a 6TB or 8TB 5400rpm drive in that case. I'd budgeted for the cost of an 8TB drive. It will also give me scope to expand, should I catch 'the bug'...! :D
 
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