Uncompressed root fs to ramdisk.

[Ralph Stickley]

Good Job!

Not sure about the minigetty thing.  I think the /dev/tty things (are they
files , pipes ? does anybody know ?? ) have to be in R/W partition. I just
linked to my ram disk:

mount /dev/ram /var
/tmp -> /var
/dev/tty0 -> /tmp/tty0
...

Where /tmp is a link to the /var mount point for the ram disk. That might help
?

Do you create more than one ramdisk ? How do you specify the size of your ram
disk ?

BTW, If I don't login with root privledge, I can never get my console window to
open. (Something to do with ttyP0 and ptyp0 I think...)

Little bits here and there to clean up yet....so little time :-)

Good luck,
Ralph

--- Mattias Sjogren <mattias@voxway.com> wrote:
> After some minor initial problems we're now up and
> running... Our only remaining problem is that mingetty does
> not like to be run from the read-only disk. Init says that
> it respawned too many times.
> 
> I have /var (inc a touched run/utmp), /tmp and /root as
> mounted ramdisks. I boot of one big partition that I want
> read-only.
> 
> /Mattias
> 
> Ralph Stickley <r_stickley@yahoo.com> skrev:
> > Hi,
> > 
> > The solution I used to protect the system (copied from
> > some other
> > distributions):
> > 
> > Format the Compact Flash as follows:
> > 1. hdx1 Create a boot partition (~1MB)
> > 2. hdx2 Create a Read Only partition (~28MB)
> > 3. hdx3 Create a Read/Write partition (~1MB)
> > 
> > Now load each partition:
> > 1. hdx1 Copy boot.b and kernel-2.2.14 (or whatever your
> > image is)
> > 2. hdx2 Copy all files here
> > 3. hdx3 format/erase
> > 
> > Now run LiLo and tell it where the boot image is
> > (/dev/hdx1) 
> > and where the file system is (root=/dev/hdx2)
> > 
> > Note fstab never has to mount the boot partition. All
> > system files are
> > maintained on the read only partition and never get
> > corrupted. User files are
> > vulenerable, but can be backed up on-to the Read only
> > partition as required.
> > 
> > The trickery is all in rc.sysinit. At boot up, you have
> > to mount everything
> > and then load the default files to the read/write
> > partition. This
> > needs to be checked and reformatted if it gets corrupted.
> > I also create a ramdisk to store the /tmp /var /whatever
> > files in.
> > this gives about 4MB of space to let the system store
> > stuff.
> > 
> > 
> > Some files on the Read Only partition may need to be
> > updated on
> > occasion.  A simple script will allow access to do this 
> > (mount -o remount...).
> > 
> > So far, this works for me, doesn't take much ram.  I
> > don't know how
> > to get the permissions set properly, how to get the
> > devices to work
> > everytime and other little problems....
> > 
> > The applications I have working (on 32MB CF) so far:
> > Netscape 4.7/Citrix/x3270/fvwm95
> > 
> > All system configuration is done through fvwm scripts
> > (clock, mouse,
> > keyboard, beep, network, startup applications, screen
> > background).
> > 
> > Hope this helps,
> > Ralph
> > 
> > --- Mattias Sjogren <mattias@voxway.com> wrote:
> > > Hi all!
> > > 
> > > I have just got going with PeeWee Linux and it looks
> > great
> > > so far... My only problem is that I want to load the
> > > uncompressed root filesystem to ram to avoid corruption
> > on
> > > sudden power failures. I know that this is easily done
> > with
> > > a compressed root fs but that makes it so hard to
> > change so
> > > I don't want that.
> > > 
> > > I'm booting from a 16MB Flash pcmcia card in an ide
> > adaptor
> > > using LILO. 
> > > 
> > > Another small question... How do I get the statup
> > scripts to
> > > automatically run fsck on the root fs? I have a '1' at
> > the
> > > right place in fstab but that doesn't help and I get no
> > > errors...
> > > 
> > Don't know, I have the same problem...some option in
> > mount I suppose...
> > 
> > 
> > __________________________________________________
> > Do You Yahoo!?
> > Send instant messages & get email alerts with Yahoo!
> > Messenger.
> > http://im.yahoo.com/
> > ---------------------------------------------------
> > See the list archives at http://adis.on.ca/archives/
> > See the PWL homepage at  http://embedded.adis.on.ca
> > ---------------------------------------------------
> 
> http://www.docs.uu.se/robocup/
> ---------------------------------------------------
> See the list archives at http://adis.on.ca/archives/
> See the PWL homepage at  http://embedded.adis.on.ca
> ---------------------------------------------------


__________________________________________________
Do You Yahoo!?
Send instant messages & get email alerts with Yahoo! Messenger.
http://im.yahoo.com/
---------------------------------------------------
See the list archives at http://adis.on.ca/archives/
See the PWL homepage at  http://embedded.adis.on.ca
---------------------------------------------------