RAID vs JBOD on NVR

V

vertices

n3wb
Feb 2, 2019
3
1
My office
Looking at getting one of these: Hikvision96064NI-I16 64-Channel 12MP NVR (No HDD, 3 RU)

This will have around 60 cams, loaded with 16x 10TB WD Purple drives. In the normal IT world, I would use RAID6 with a hotspare on something like this. Couple of questions:

1. For cams, if you just jbod this, do cams randomly pick a disk to record to? Or do you have to map cams to specific disks?
2. What do the pros normally do? RAID this or JBOD it and just lose whatever random video was on the failed drive?

Thanks.
 
vertices said:
Looking at getting one of these: Hikvision96064NI-I16 64-Channel 12MP NVR (No HDD, 3 RU)

This will have around 60 cams, loaded with 16x 10TB WD Purple drives. In the normal IT world, I would use RAID6 with a hotspare on something like this. Couple of questions:

1. For cams, if you just jbod this, do cams randomly pick a disk to record to? Or do you have to map cams to specific disks?
2. What do the pros normally do? RAID this or JBOD it and just lose whatever random video was on the failed drive?

Thanks.
Click to expand...

Welcome @vertices

Additional questions:

Does RAID6 affect video / stream writes to the point that they slow down the system?
Can the Hikvision NVR function well as a stream storage unit to RAID6 or other redundant storage?

Most of us who are doing smaller setups skip the RAID requirements as HDDs are fairly reliable and few of us really need that level of redundancy.

However, with more HDDs you do have a higher chance of one HDD failure.
 
Yes those are also good questions. It claims it can handle 512mbps of ingress traffic, wondering if that is still the case on RAID6. I would think it would be faster, even with RAID6 parity overhead, just due to the number of drives. However that is also up to how well the controller performs. On a good controller, 16 drive RAID6 is going to be a lot faster, especially on these sequential writes.
 
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Hmm. Big system. I wouldn't want to support that.

The spec for that NVR does mention RAID in the context of bandwidth, so I would think if there was a limit on incoming bandwidth with any type of RAID enabled, they would have said so.

Bandwidth
Incoming: 512 Mb/s
Outgoing: 512 Mb/s, or 400 Mb/s (when RAID is enabled)
Click to expand...
 
WD purple 10 TB drives are rated for 210 MB/s, or 1680 Mbps, so the HDDs certainly shouldn't be a bottleneck here. Unless one of them begins to fail, in which case it would probably affect the performance of the entire array, and that wouldn't be good.
 
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