Re: Linux on CF-Cards
In message <[🔎] 20040122222628.GB7849@minhnam> you wrote:
>
> Yes, it is true that CF has a rather limited write cycle, compared
> to other persistent storage. But, I don't think anybody doing
> serious embedded systems will want to use the CF as a hard disk.
Wrong. "Hard disk" does not automatically mean "writable filesystem",
and using a CF as read-only device is pretty reliable.
> CF is a great way to boot up the system. Then, most of its content
> should be mounted as read-only on a ram-based root filesystem. The
> writable-part should be on the ramdisk, and should be updated to
Using a ramdisk is simple, but far from optima. In almost all
circumstances a tmpfs is a much better choice.
> Does Linux have union-mount yet, in 2.6.x? It will make my life
> less miserable in building embedded systems.
We're working on a FIST based fan-out filesystem which will allow
exactly what you are looking for.
Best regards,
Wolfgang Denk
--
See us @ Embedded World, Nuremberg, Feb 17 - 19, Hall 12.0 Booth 440
Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd@denx.de
The only person who always got his work done by Friday
was Robinson Crusoe.
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