jeremy ardley wrote: > > On 13/7/23 19:00, debian-u...@howorth.org.uk wrote: > > jeremy ardley <jeremy.ard...@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-
