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  • Re: Maximising SD Card Life 24/7

    From The Natural Philosopher@3:770/3 to druck on Sun Mar 21 14:51:04 2021
    On 21/03/2021 12:40, druck wrote:
    On 20/03/2021 11:22, mm0fmf wrote:
    The following are mounted onto tmpfs:

    tmpfs on /tmp type tmpfs (rw,nosuid,noatime,size=102400k)
    tmpfs on /var/spool/mqueue type tmpfs
    (rw,nosuid,noatime,size=30720k,mode=700,gid=12)
    tmpfs on /var/tmp type tmpfs (rw,nosuid,noatime,size=30720k)
    tmpfs on /var/log type tmpfs (rw,nosuid,noatime,size=102400k,mode=755)

    The problem with /var/log on /tmp is you have no clue as to what has
    gone wrong when there is a problem and you have to reboot. You can set
    up syslog to log to another computer, but this wont help if problems are
    due to network issues.

    ---druck

    This is very true, but you can always revert to using the SD card if
    there is a repeatable issue



    --
    “The ultimate result of shielding men from the effects of folly is to
    fill the world with fools.”

    Herbert Spencer

    --- SoupGate-Win32 v1.05
    * Origin: Agency HUB, Dunedin - New Zealand | Fido<>Usenet Gateway (3:770/3)
  • From Theo@3:770/3 to Tauno Voipio on Sun Mar 21 14:23:22 2021
    Tauno Voipio <[email protected]d> wrote:
    I'm just curious: What makes a Flash memory on an USB interface
    more durable than a Flash memory on a SD card?

    Space. A microSD card is very very space constrained. It typically has a stack of flash dice (eg 32 dice) bonded to a controller, that all has to fit
    in the micro SD form factor, with very tight thickness constraints. Additionally, the form factor limits its heat dissipation. Typically the controller doesn't have much local RAM, which is used for caching and
    wear levelling.

    A USB device isn't limited by the microSD form factor or heat budget, so there's a lot more potential for using proper controllers sometimes with dedicated RAM chips. For example the Sandisk Extreme series (at least
    the ones I've looked at) contains a full SATA SSD controller, with a SATA to USB bridge chip on the front. That's a lot more to fit into the package
    than just slapping a simple flash controller onto a stack of NAND dice.

    Theo

    --- SoupGate-Win32 v1.05
    * Origin: Agency HUB, Dunedin - New Zealand | Fido<>Usenet Gateway (3:770/3)
  • From Computer Nerd Kev@3:770/3 to David Taylor on Sun Mar 21 21:51:23 2021
    David Taylor <[email protected]d> wrote:
    The only other thing I do these days is to buy as big an SD card as I
    can. That's 32 GB now (I don't know whether the RPi or the PC I use for imaging would take 64 GB).

    So far as the Pi goes there shouldn't be any worries up to 256GB,
    and higher for the Pi 3 and later.

    https://www.raspberrypi.org/documentation/installation/sd-cards.md

    --
    __ __
    #_ < |\| |< _#

    --- SoupGate-Win32 v1.05
    * Origin: Agency HUB, Dunedin - New Zealand | Fido<>Usenet Gateway (3:770/3)
  • From David Taylor@3:770/3 to Computer Nerd Kev on Mon Mar 22 10:06:50 2021
    On 21/03/2021 21:51, Computer Nerd Kev wrote:
    David Taylor <[email protected]d> wrote:
    The only other thing I do these days is to buy as big an SD card as I
    can. That's 32 GB now (I don't know whether the RPi or the PC I use for
    imaging would take 64 GB).

    So far as the Pi goes there shouldn't be any worries up to 256GB,
    and higher for the Pi 3 and later.

    https://www.raspberrypi.org/documentation/installation/sd-cards.md

    Thanks!

    --
    Cheers,
    David
    Web: http://www.satsignal.eu

    --- SoupGate-Win32 v1.05
    * Origin: Agency HUB, Dunedin - New Zealand | Fido<>Usenet Gateway (3:770/3)