[kwlug-disc] Cyber Monday ...

[Ron Singh]

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.

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.

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.
The NAS drives are in a RAID5 config usually, so there is RAID controller
buffering going on to muddy things too.

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?

FWIW.

Ron S.



On Mon, Nov 28, 2022 at 7:21 AM CrankyOldBugger <crankyoldbugger at gmail.com>
wrote:

> Can confirm what Jason said: that IronWolf drive is for NAS boxes.
>
> On Mon, Nov 28, 2022 at 12:10 AM Jason <jasonpa at gmail.com> wrote:
>
>> Here's a good deal on the WD Purple Pro - has a higher RPM, workload
>> rating, and warranty, and basically the same price:
>>
>> https://www.memoryexpress.com/Products/MX00117407
>>
>> On Mon, Nov 28, 2022, 12:02 a.m. Jason <jasonpa at gmail.com> wrote:
>>
>>> Isn't that a NAS type drive?  Not sure if that's what would work best
>>> with constant writes.
>>>
>>> I'd recommend the Western Digital Purple drives.  These are made
>>> specifically for a surveillance use case:
>>>
>>>
>>> https://www.canadacomputers.com/product_info.php?cPath=15_4232&item_id=189578
>>>
>>> On Sun, Nov 27, 2022, 4:38 p.m. Ron Singh <ronsingh149 at gmail.com> wrote:
>>>
>>>> Not sure if the single unit showing as being in stock(Waterloo) is real
>>>> or Memorex, but perhaps this --
>>>>
>>>>
>>>> https://www.canadacomputers.com/product_info.php?cPath=15_4232&item_id=162381
>>>>
>>>> Thanks,
>>>>
>>>> Ron S.
>>>>
>>>>
>>>>
>>>> On Sun, Nov 27, 2022 at 4:22 PM Khalid Baheyeldin <kb at 2bits.com> wrote:
>>>>
>>>>> I am in the market for a surveillance grade 3.5" hard disk that is 6TB
>>>>> or greater ...
>>>>>
>>>>> This will go into a network video recorder (NVR) and will be written
>>>>> to 24x7 ...
>>>>>
>>>>> Any recommendations?
>>>>>
>>>>> --
>>>>> Khalid M. Baheyeldin
>>>>>
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