On Sun, 06 Jan 2019 10:23:19 +0000, Markus Robert Kessler wrote:

> Therefore I have 3 user processes running:
>
> - one process under root, writing to /dev/watchdog every 5 seconds - one
> ping to Fritzbox every 1 minute and writing to >> /tmp/fritzlog - one
> ping to net printer, 1/min. and writing to >> /tmp/printerlogfile
>
Did you write these processes yourself or are they from a package? The
reason for asking is that, if they are your code, consider reversing the
logging logic and only reporting problems to the log, rather than what
sound like endless 'I'm OK' messages. Apart from reducing wear on the SD
card, it will make the logs a lot easier to read.

> I am / was using KINGSTON 8 GB cards, installed with Raspbian stretch
> out of the box, installed straight forward with boot and root partition.
> Root fs partition had > 2 GB available after install.
>
I used to use Kingston years ago, stopped when I found out that they are
only a rebrander, i.e. that their SD cards no long come from a single,
known foundry.

I now use Sandisk, because they make their own product, for everything:
cameras, RPi as well as the flight logger, navigation PNA and FLARM
system in my glider. The latter two are safety-critical systems.

I'm not quoting usage figures for my RPi because its run time is just an
hour or two per week.

The only problem I have with it, an early 512MB Model B, is that if I
leave it idle for an hour or two after booting it appears to be dead when
I try to log in to it over SSH. However, if I log in and out as soon as
it has come up after booting then its still responsive a couple of hours
later.

> The system was running for about 2 week and I had access to all the data
> on both partitions, but I needed to do a reboot, and I now had to find
> out, that the Root fs partition (/dev/sdc2 when trying to mount on a
> normal PC) is completely unaccessible. Plugging in shows up both
> partitions, but every attempt to mount will fail.
>
Obvious question: is the PC running Linux? If not, then it will only be
able to read the boot partition.


--
Martin    | martin at
Gregorie  | gregorie dot org

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