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.
