[Arm-dev] File system corruption
Stephan GUILLOUX
stephan.guilloux at free.fr
Thu Dec 13 19:42:07 UTC 2018
On 13-Dec-18 18:09, Fred Gleason wrote:
> On Dec 13, 2018, at 11:54, Stephan Guilloux
> <stephan.guilloux at crisalid.com <mailto:stephan.guilloux at crisalid.com>>
> wrote:
>
>> Stress test still running on reputable brand with no PB, after 6 or 7h.
>>
>> During this stressing session, we found a few broken SD, from another
>> reputable brand.
>> Not all cards, though, but enough to put some confusion... ;-)
>
> Well, remember, we are dealing with flash RAM here. After enough
> write/erase cycles, it *will* wear out. The goal is to optimize the
> overall system to get maximum lifetime out of the media. For example,
> on our production setups we do things like putting ‘/var/log’ on tmpfs
> (it doesn’t matter for the particular application that the log data
> evaporates after reboots). That greatly reduces wear on the media,
> while still allowing log data to be accessed during a session for
> debug purposes.
/tmp, /var/log, /var/tmp (and a few others) need TMPFS, yes.
>
> Cheers!
>
>
> |----------------------------------------------------------------------|
> | Frederick F. Gleason, Jr. | Chief Developer |
> | | Paravel Systems |
> |----------------------------------------------------------------------|
> | You can never tell which way the train went by looking at the |
> | tracks. |
> | -- Kramer's Law |
> |----------------------------------------------------------------------|
>
>
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