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.
