"HD" is pretty low by PC standards, and we're surely talking about compressed videos streams (uncompressed doesn't make sense to store). So ~1 MBit per stream is probably sufficient, which is not out of reach of HDDs if the acess pattern is optimized.
Well, most HD streams are more in the range of 8Mbits - 20Mbits. Still, we are talking about 1MBps - 2.5MBps so x 64 for large writes is still well within the performance.
Surveillance streams are probably even lower framerates and more heavily compressed to produce the awful quality that we always see on the news/etc when something happens.
Depends on the camera system. For example we have ours set to 1280x720 30fps at 1Mbps but you can toggle the bit-rate, resolution and frames per second.
I just started a 4k 64 thread test on a mechanical drive and i don't think i have enough patience to wait for the results, an ssd breezes right through it while the hd is taking its sweet time.
Is there any disadvantage (other than price) to using exclusively using surveillance type hard drives in a NAS box, even if it is not being used for surveillance purposes?
Yes. Surveillance drive firmware basically doesn't give a toss about write errors, its designed to just keep writing no matter what due to expecting to handle a constant stream of incoming data. Not something you want in a NAS (where you actually care about every bit you're writing).
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shabby - Thursday, November 30, 2017 - link
Did the pr department come up with that 64 hd streams feature? I'd like to see this put to the test, I smell bs.MrSpadge - Thursday, November 30, 2017 - link
"HD" is pretty low by PC standards, and we're surely talking about compressed videos streams (uncompressed doesn't make sense to store). So ~1 MBit per stream is probably sufficient, which is not out of reach of HDDs if the acess pattern is optimized.ERJ - Thursday, November 30, 2017 - link
Well, most HD streams are more in the range of 8Mbits - 20Mbits. Still, we are talking about 1MBps - 2.5MBps so x 64 for large writes is still well within the performance.Death666Angel - Thursday, November 30, 2017 - link
Youtube says "720p 5 Mbit/s 7,5 Mbit/s" (which is generally considered HD) and "1080p 8 Mbit/s 12 Mbit/s" (which is Full HD).quiksilvr - Thursday, November 30, 2017 - link
Incorrect. The video bitrate range for 720p video at 30fps is 1.5 - 4 Mbps. My source is google support itself:https://support.google.com/youtube/answer/2853702?...
DanNeely - Thursday, November 30, 2017 - link
Surveillance streams are probably even lower framerates and more heavily compressed to produce the awful quality that we always see on the news/etc when something happens.quiksilvr - Thursday, November 30, 2017 - link
Depends on the camera system. For example we have ours set to 1280x720 30fps at 1Mbps but you can toggle the bit-rate, resolution and frames per second.shabby - Friday, December 1, 2017 - link
I just started a 4k 64 thread test on a mechanical drive and i don't think i have enough patience to wait for the results, an ssd breezes right through it while the hd is taking its sweet time.Ktracho - Thursday, November 30, 2017 - link
Is there any disadvantage (other than price) to using exclusively using surveillance type hard drives in a NAS box, even if it is not being used for surveillance purposes?edzieba - Friday, December 1, 2017 - link
Yes. Surveillance drive firmware basically doesn't give a toss about write errors, its designed to just keep writing no matter what due to expecting to handle a constant stream of incoming data. Not something you want in a NAS (where you actually care about every bit you're writing).