[maemo-developers] [maemo-developers] Re: Span filesystem across both SD cards?

From: Paul Klapperich maemo.org at bobpaul.org
Date: Sat Feb 3 15:59:29 EET 2007
This is already on the wiki[1] and ITT forums. This is not new.

I would recommend cleaning up the wiki page if you feel it is unclear.
Alternative2 is what you did.

[1] http://maemo.org/maemowiki/HowTo_BootRootFSFromMMC


On 2/2/07, sebastian maemo <sebastian.maemo at gmail.com> wrote:
> Hi, I've been playing around Fanoush's idea and MUST say it is a pretty cool
> solution. Things are improving a lot. Before giving definitive results I
> want to play with all weekend, but I can just say that performance speed has
> increased substantially. I would say that it's almost doubled (seriously).
> I'd suggest that the effect is similar to that one can experience when
> adding a lot of extra RAM to a Desktop PC (running Windows).
> The idea is basically to create first a dual boot system, then copy an image
> of the whole system to the memory card, and finally dual boot to the memory
> card or internal flash. It is supposed to preserve the internal flash system
> intact (as a backup), and usually boot from the mmc in order to have 1GB or
> more to install as many applications as you like. I've personally got 700MB
> of free memory space to install my favourites applications that are: ALL OF
> THEM!!. Principally I needed to install Octave that consumed a lot of space.
> My first conclusion of this solution is that:
> 1. It's easy to implement (when you know exactly what to do, of course;
> after all your help in this matter, I'll prepare a blog to explain it to the
> last detail, so that people don't need to browse multiple sites to find out)
> 2. ACCELERATION. It's incredible how clean and fast are my browser and other
> typically slow applications. I don't want to look naive in this question.
> But it might be interesting to do a test of speed before and after. I'm not
> in the mood to do it, because I just don't want to pass the whole process
> again.
> 3. Free memory. Now I can install as many applications I like. Before this
> solution, I typically had to uninstall the less used apps in order to
> install new or more necessary apps. I needed octave for my job, and that
> limited me a lot.
> I think that good and clear advice on this subject is COMPULSORY for Sputnik
> users. I think that (almost) all of them are interested in gaining more
> memory space for installation, and improve the speed of their devices. And
> this could be THE solution.
> I'll write again in three days or so to give a definite opinion.
> Salut.
> Sebas.
> Thanks again to all of you, and specially to Frantisek.
> 2007/2/2, Neil MacLeod <gmane at nmacleod.com>:
> > Matan Ziv-Av wrote:
> > > insmod unionfs.ko
> > > mount -t unionfs -o dirs=/media/mmc1/usr=rw:/usr=ro unionfs /usr
> > >
> > > to startup scripts (early enough) before anything opens a file for
> writing under
> > > /usr.
> > >
> > > See here:
> > >
> > > http://www.linux-live.org/unionfs/
> > >
> >
> > Would unionfs allow a single file to span two directories/partitions?
> >
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> >
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