[ts-7000] Re: running root filesystem from ramdisk

["Yan Seiner" <>]

--- In  "Hamish Avery" <> wrote:
>
> Hi Mark, Yan and Bas,
> 
> Thanks for the advice.  Unfortunately, I really do want to be able to
> do an atomic filesystem update, and running from an expanded root
> filesystem makes this difficult.  The only workable option to do this
> seems to be Mark's idea to create a ramdisk on /dev/rd once the system
> is up and then expand a compressed root filesystem into that and
> switch to it.  It's slow and IMHO needlessly complicated though, and
> the simplist option by far is to boot into a ramdisk. 
> 


You can try looking at OpenWrt - http://www.openwrt.org - they ship a
squashfs image that can be updated to a small jffs2 partition.

I'm not really sure how that's done.  squashfs is read-only by
definition; to change it you have to rebuild a new image and reflash
the board.  OpenWrt uses some sort of symlink magic to allow 'updates'.

I'm not sure if that's what you're looking for, though.  Do you need
to update any arbitrary file on the system? Or just a few?

Aside:

Can the TS bootloader support squashfs?

--Yan



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