Re: jff2 filesystem in vanilla

[David Woodhouse]

On Sat, 2004-06-05 at 10:27 +0200, Daniel Egger wrote:
> The original version in the 2.4 kernel has a dramatic problem
> leading to FS corruption, at least when used with blkmtd on CF.
> That's why I'm using 2.4 and a CVS snapshot, not only because
> it is much faster.

Can you be more specific? I don't know of any such problems. If they
exist, they give me a potential excuse to update 2.4 to the current code
-- but to be honest I'd rather just leave it in maintenance mode.

> Believe it or not but JFFS2 is the only filesystem that works
> reasonably on CF, especially when the system is used mostly read
> only and the device is cut off from power every now and then. ;)

CF is bog-roll technology. I wouldn't want to use it in production even
with JFFS2 on it -- but at least when it gets confused you'll only lose
a limited amount of data with JFFS2.

If you're going to use JFFS2 on CF, you should really investigate using
the write-buffer we implemented for NAND flash, but without the ECC
parts. It'll mean you write each CF sector once rather than overwriting
the sector each time you add a few bytes to the log.

-- 
dwmw2


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