Re: Migrating system from u-sd to nvme memory on arm64's?
jeremy ardley wrote:
>
> On 13/7/23 19:00, debian-user@howorth.org.uk wrote:
> > jeremy ardley <jeremy.ardley@gmail.com> wrote:
> >
> > > In the same vein, it's really a bad idea to run video surveillance on
> > > a SSD as overwriting the complete SSD every couple of weeks will
> > > trash it in no time. There are probably SSDs that boast to do this,
> > > but the standard now is using carefully designed spinning drives
> > > optimised for surveillance.
> > So all dashcams are junk?
> >
>
> I think you'll find dashcams have a removable CF card that can be replaced.
> Secondly dashcams don't routinely write to flash. They require a trigger
> such as a user input or collision detection to write the last few minutes to
> flash from RAM.
>
> There will possibly be use-cases where a dashcam records continuously for
> extended periods but they are very unlikely to use a commodity CF card.
All the dashcams I am aware of write in N-minute chunks to their commodity
SD or microSD card, deleting the oldest when some number of chunks have been written,
unless a trigger causes them to mark the chunks for long-term storage.
I have owned five dashcams, all of which worked this way. The
RAM-to-disk-on-trigger functionality you are talking about is called
"parking mode", and is usually but not ubiquitously available.
Yes, dashcams wear out flash cards. Replace them annually.
-dsr-
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