Jaime,
I use an entirely flash based system with CRAM fs. As it is read only, at
startup I create a ram disk which I mount as /tmp with a softlink to /var. Some
other fiddling is required here and there around network stuff (specifically dhcp
client).
Dave
"Dr Jaime V. Miro" wrote:
> Hi there,
>
> This is not exactly an specific ARM platform question, but I believe is of interest
>to the community,
> and I use an ARM platform anyway (ebsa285) where these ideas are put into practice.
>
> My question: what would be the best file system for an embedded platform that uses
>most of the fs as
> read-only, but needs write access for a few of state files? right now, the
>application runs on
> boot-up from an IDE, but if the users shut the box the "hard way", i.e., turn power
>off, fs gets
> messed up, as expected. It mostly comes back on the next boot-up after fsck, but it
>has also happened
> that the odd hard drive has died on us. It's not the way to go anyway.
> We've played with JFFS, but the memory overheads for the database are massive. I am
>aware of Cramfs, but
> not familiar with it. We've been playing also with ramdisks, and it works, but if it
>not unmounted on shutdown,
> the state information that needs to be saved up, is obviously lost.
>
> Has anybody out there faced a similar situation? any thoughts welcome. I am happy to
>keep trying all the
> available options.
>
> TIA
>
> Jaime
>
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