<div dir="ltr"><div class="gmail_default" style="font-family:tahoma,sans-serif">Yeah, I hear you, it's just that a lot of the white papers extolling the diff between surveillance drives and NAS drives come across as just so much marketing-speak. <br></div><div class="gmail_default" style="font-family:tahoma,sans-serif"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif">There is likely some tuning of the firmware to favour sequential vs random read/write, but seriously, even if one has a bank of 16 cams, recording 720P/24fps in B/W, there will be 16 streams of seq writes at a relatively low data rate. Is 16 seq streams akin to a 16x random data stream to the firmware? I don't know, but it feels like it.</div><div class="gmail_default" style="font-family:tahoma,sans-serif"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif">What I do know is that we have a number of clients using NAS boxes with NAS drives, and they are connected to NVRs with anywhere between 4 and 28 cams(some even in colour). Running for years, no issues of drive death or data path saturation.<br></div><div class="gmail_default" style="font-family:tahoma,sans-serif">The NAS drives are in a RAID5 config usually, so there is RAID controller buffering going on to muddy things too.</div><div class="gmail_default" style="font-family:tahoma,sans-serif"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif">I guess I just don't see how the "optimized for seq read/write" thing on surveillance drives will work with the multiple-streaming reality of having a bunch of cams streaming video to a drive, unless there is a TON of RAM on said drive to buffer the many webcam streams before doing a seq write of each stream/aggregated stream?<br></div><div class="gmail_default" style="font-family:tahoma,sans-serif"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif">FWIW.</div><div class="gmail_default" style="font-family:tahoma,sans-serif"><br clear="all"></div><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><span class="gmail_default" style="font-family:tahoma,sans-serif">R</span>on S.<br><br></div></div></div></div></div></div><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Nov 28, 2022 at 7:21 AM CrankyOldBugger <<a href="mailto:crankyoldbugger@gmail.com">crankyoldbugger@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Can confirm what Jason said: that IronWolf drive is for NAS boxes.<br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Nov 28, 2022 at 12:10 AM Jason <<a href="mailto:jasonpa@gmail.com" target="_blank">jasonpa@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="auto">Here's a good deal on the WD Purple Pro - has a higher RPM, workload rating, and warranty, and basically the same price:<div dir="auto"><br></div><div dir="auto"><a href="https://www.memoryexpress.com/Products/MX00117407" target="_blank">https://www.memoryexpress.com/Products/MX00117407</a><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Nov 28, 2022, 12:02 a.m. Jason <<a href="mailto:jasonpa@gmail.com" target="_blank">jasonpa@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="auto">Isn't that a NAS type drive? Not sure if that's what would work best with constant writes.<div dir="auto"><br></div><div dir="auto">I'd recommend the Western Digital Purple drives. These are made specifically for a surveillance use case:</div><div dir="auto"><br></div><div dir="auto"><a href="https://www.canadacomputers.com/product_info.php?cPath=15_4232&item_id=189578" rel="noreferrer" target="_blank">https://www.canadacomputers.com/product_info.php?cPath=15_4232&item_id=189578</a></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Nov 27, 2022, 4:38 p.m. Ron Singh <<a href="mailto:ronsingh149@gmail.com" rel="noreferrer" target="_blank">ronsingh149@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_default" style="font-family:tahoma,sans-serif">Not sure if the single unit showing as being in stock(Waterloo) is real or Memorex, but perhaps this --</div><div class="gmail_default" style="font-family:tahoma,sans-serif"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif"><a href="https://www.canadacomputers.com/product_info.php?cPath=15_4232&item_id=162381" rel="noreferrer noreferrer" target="_blank">https://www.canadacomputers.com/product_info.php?cPath=15_4232&item_id=162381</a></div><div class="gmail_default" style="font-family:tahoma,sans-serif"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif"></div><div><div dir="ltr"><div dir="ltr"><div><div dir="ltr"><div>Thanks,<br><br>Ron S.<br><br></div></div></div></div></div></div><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Nov 27, 2022 at 4:22 PM Khalid Baheyeldin <<a href="mailto:kb@2bits.com" rel="noreferrer noreferrer" target="_blank">kb@2bits.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div>I am in the market for a surveillance grade 3.5" hard disk that is 6TB or greater ...</div><div><br></div><div>This will go into a network video recorder (NVR) and will be written to 24x7 ...</div><div><br></div><div>Any recommendations?<br></div><div><div><br>-- <br><div dir="ltr">Khalid M. Baheyeldin<br><br></div></div></div></div>
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