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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).

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