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how configure Readynas 524X for best video surveillance performance
Hello I have a readynas 524X with four 4TB disks. I use the readynas surveillance app that i still think is good. I want to ask the community if anyone can tell me how i should configure my ready...
mangebest wrote:
its WD40EFAX 4 TB times 4disks.
If you are looking for the best performance, the drives are the foundation. Unfortunately the WD40EFAX isn't the best choice for a surveillance application - the WD40EFAX is an SMR drive. So its sustained write performance is quite poor (and very variable).
The WD40EFZX (WD Red Plus) is much better for this - it uses CMR technology.
An Enterprise class drive like the WD4003FFBX (Red Pro) has a faster RPM - which doesn't improve sustained write speed that much over the EFZX, but would improve random access times (which might help when browsing through files for playback). Enterprise drives do cost more, but they also generally come with 5 year warranties.
its WD40EFAX 4 TB times 4disks.
cameras on, Tomorrow i will turn them off and try again.
good night
Magnus
mangebest wrote:
its WD40EFAX 4 TB times 4disks.
If you are looking for the best performance, the drives are the foundation. Unfortunately the WD40EFAX isn't the best choice for a surveillance application - the WD40EFAX is an SMR drive. So its sustained write performance is quite poor (and very variable).
The WD40EFZX (WD Red Plus) is much better for this - it uses CMR technology.
An Enterprise class drive like the WD4003FFBX (Red Pro) has a faster RPM - which doesn't improve sustained write speed that much over the EFZX, but would improve random access times (which might help when browsing through files for playback). Enterprise drives do cost more, but they also generally come with 5 year warranties.
thank you
Good to know!
I have turned off half of the cameras and- yes the NAS was faster to respond.
The surveillance program tells me that when all the cameras are on the bitrate is 66000 Kbps.
In your opinion should i go for new disks or 10gb network to my client?
And, since i don´t understand all the config on the NAS is there any "obvious" settings that i mabey
have turned on that shouldnt be on in regards to speed.
best regards
Magnus
..should i maybe go for SSD?...
mangebest wrote:
The surveillance program tells me that when all the cameras are on the bitrate is 66000 Kbps.
In your opinion should i go for new disks or 10gb network to my client?
66 megabits per second? Or 66 megabytes per second? Both can be handled comfortably by a gigabit infrastructure, but it still would be useful to know (see below).
I am thinking now that the main problem is the SMR drives. They depend heavily on caching, and when the caching isn't enough the write speeds get really really slow. If your cameras are always recording, the caching definitely won't be enough.Playing with RAID modes (or settings) probably won't overcome this.
So I'd go for new disks over a 10 gb network upgrade.
mangebest wrote:
..should i maybe go for SSD?...
They would of course be much faster, and much more expensive for 4x4TB. Performance with SSDs would be limited by the network, no matter what RAID mode you used. You do need to pay some attention to the write limits.
Four 4 TB Samsung 870 drives would cost you about $1700 (current US amazon price), and each drive is spec'd at 2400 TB worth of writes over its lifetime. Assuming 66 Mbps from the cameras, you'd be writing about 1 TB per day (counting RAID-5 overhead), spread evenly across all four drives. So about 250 GB per drive per day. Over the 5 year warranty, that works out to ~460 TB/drive (and it would take over 20 years to reach the write limit spec).
But 66 MBps would be 8x the load - about 7.6 TB/day total, or roughly 2 TB per drive per day. In that case the drives need to be replaced about every 3 years. That is why I asked about the units above.
The write limits do vary, so you'd need to get this info for the specific SSDs you purchase. (BTW, the Samsung 2400 TB spec is only for the 4 TB 870. The spec is lower for smaller SSDs).
Thank you very much for helping me whith my problem!
I think disks too. I have read up on your explanation and it sound the way to go.
I really dont need the 4 disks i can get by with only two i think. two 4tb red pro.
it is most surely 66 megabits i think.
One last question and i would be very happy.
How do i backup the surveillance app. last time (when i cnaged the NAS i lost the function of the surveillance serial numbers. Am i right in thinking that since i dont change NAS the serials will work?best regards
Magnus
could i bother you for your opinion on the WDpurple surveillance disk compared to WDplus
in my all surveillance system
mangebest wrote:
could i bother you for your opinion on the WDpurple surveillance disk compared to WDplus
in my all surveillance system
I've never owned a purple drive, so I have no direct experience. I can only go by the datasheet.
The WD4NPURX is spec'd at 150 MB/s, and has a cache of 64 MB. Power is spec'd at 4.8 watts. amd noise is about 25 dba. WD specs its workload at 180 TB/year.
The WD40EFRX is spec'd at 175 MB/s, and has a cache size of 128 MB. Power is spec'd at 4.8 watts, and noise is also about 25 dba. WD specs its workload at 180 TB/year.
Based on specs alone, the WD40EFRX is a somewhat faster, and has twice the cache. Other specs are about the same. Price is also similar (Amazon US has the WD40EFRX for a bit less).
I'd go with the WD40EFRX myself, as
- it appears to offer a bit more performance
- it has a long track record here (many folks have used it in their ReadyNAS with success).
That settles it. i will tell you what i think when i have upgraded.
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