[ECOS] jffs2 on IDE?

[Ross Younger]

Stanislav Meduna wrote:
> is it possible to use a jffs2 filesystem on a IDE partition?

I'm no expert on either, but it ought to be possible. You may need to 
play carefully with how you map one to the other (how many IDE blocks 
make up a simulated flash eraseblock) to get good performance.

> If not, what is the recommended way of creating a filesystem
> on an industrial PC platform using CF-cards for data, where
> an unclean shutdown can't be avoided?

This is a tricky case. I don't know what your application is doing with 
the IDE drive, but in some cases you might be able to mitigate the risks 
by keeping the filesystem read-only for much of the time.

An alternative plan could be to port in a journalled filesystem. ext3 
springs to mind, though I don't know how tightly its internals are wired 
into the Linux kernel (and I think you might end up needing to port in 
jbd as well); Sun's ZFS has been ported to several OSes and might also 
be worth a look.


Ross

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