On Fri, 2006-12-08 at 03:37 -0600, Johnny Hughes wrote: > On Wed, 2006-12-06 at 17:07 -0800, John R Pierce wrote: > > David Hrbác wrote: > > > Oliver Schulze L. napsal(a): > > > > > >> Thats a good point, I should look into the constant write problem. > > >> I was thinking in an embedded platform for its costs, low space, low > > >> power consumption > > >> and disk less operation. > > >> > > > > > > No, that's pretty good point. :o) Majority of systems running from > > > CF|XD|etc. are mounting read only the media, keeping logs and other > > > thins in RAM-disk and sending them to central authority. There's write > > > attempt limit within CF. > > > > > there's special file systems optimized for flash use, squashfs is > > readonly (its compressed at system build time) and jffs2 (aka jiffy) is > > a writeable FS designed to minimize block writes to the flash. > > Embedded Linux like used by OpenWRT on the WRT54GS and compatible > > routers uses both of these. > > > > http://squashfs.sourceforge.net/ > > http://sourceware.org/jffs2/ > > > > the discussion of these two on the OpenWRT WIKI... > > http://wiki.openwrt.org/OpenWrtDocs/Installing#head-3d6480403b294d4c261f360ab9efc82f388a8790 > > > > The CentOS Live CD uses squashfs and unionfs, writes to ramdisk, and > writes to one location. > > It (or something based on it) might be good for an embedded solution. > > This site has newer versions of the technique used: > > http://linux.web.psi.ch/livecd/build.html > > The CentOS kernel used (with built in squashfs support) is here: > > http://mirror.centos.org/centos/4/build/livecd/RPMS/ > Even better than the CentOS kernel is the SRPMS to build all the required kernel modules here: ftp://ftp.psi.ch/psi/livecd/SRPMS Thanks, Johnny Hughes
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