SD cards used in dashcams also suffer severe rewriting behaviour. I believe there are reviews and comparisons covering various makes in this application.
On Wed, Dec 8, 2021 at 9:30 PM Kevin Rowett <ke...@rowett.org> wrote: > The sandisk extreme sd cards have an excellent wear leveling algorithm. > > KR > > > > On Dec 8, 2021, at 1:26 PM, Nick Sayer via time-nuts < > time-nuts@lists.febo.com> wrote: > > > > I forget where I saw it, but my understanding is that the big issue is > finding SD cards that can perform whole-disk wear leveling, like proper > SSDs do. Apparently, the WD purple series do, according to the e-mail > thread I read that I forgot where. Someone contacted WD and got a > confirmation that these really do have whole-disk wear leveling. Given that > they’re targeting surveillance cameras, it seems reasonable. > > > >> On Dec 7, 2021, at 6:09 AM, John Sloan <jsl...@diag.com> wrote: > >> > >>> In this application RPis seem to last for many years - in others where > we > >>> use the SD-card (e.g. influxdb or similar) they seem to regularly fail > in > >>> 1-2 years, requiring an reformat or new SD-card. An RPi or similar > with a > >>> more robust SSD/M2 drive would be good. > >> > >> I’ve had the same experience with the SD cards. > >> > >> At least the most recent Raspberry Pis (e.g. the 4B) support firmware > to boot from USB with just a little configuration effort. I just recently > starting playing with this, booting a RPi 4B from a USB-attached Samsung T5 > SSD. It seems to work mostly fine (caveat: see below). For other reasons, > I’ve been running a RPi-specific version of Linux MATE, but Raspbian should > work okay too. (I tried the RPi-specific image of Ubuntu, since I run > Ubuntu on my Intel machines, but was not terribly impressed; slow > interactive response.) > >> > >> One thing I did run into: if I try to plug too many USB devices in > along with the SSD - e.g. in my case a mouse, keyboard, and GPS dongle - > the system crashes because the SSD USB connection resets. It seems to be a > power problem; I solved it with an external powered USB hub, leaving the > SSD on a USB port on the RPi. > >> > >> :John > >> > >> -- > >> J. L. Sloan Digital Aggregates Corporation > >> +1.303.489.5178 3440 Youngfield Street > >> mailto:jsl...@diag.com #209 > >> http://www.diag.com Wheat Ridge CO 80033 USA > >> > >> _______________________________________________ > >> time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe > send an email to time-nuts-le...@lists.febo.com > >> To unsubscribe, go to and follow the instructions there. > > _______________________________________________ > > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe > send an email to time-nuts-le...@lists.febo.com > > To unsubscribe, go to and follow the instructions there. > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send > an email to time-nuts-le...@lists.febo.com > To unsubscribe, go to and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
