Re: [debian-knoppix] [PATCH] New cheatcode "toram"
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Am Samstag, 26. Juli 2003 17:12 schrieb Donn aka n5xwb Washburn:
> Fabian;
>
> Am I just missing this or is it your purpose of - load KNOPPIX into ram
> - be able to umount the CD - remove the booted CD and then replace it
> with another CD or CD-RW. That is a great idea if it woyld work.
Of course you can remove the CD-Rom ... (Everything is in RAM)
You can also cdrecord an Knoppix with this method ;-). (Need to dl it to hd)
cu
Fabian
PS: It could be that you need to use a swap partition as knoppix just
recognizes 1 gig (880 MB) of ram.
>
> Fabian Franz wrote:
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> > Hi,
> >
> > thx to Alex Thiessen, Lex from knoppix.net-Forum, it is now possible to
> > copy the whole cdrom to ram and such use it for "better" things like
> > burning or similar (If that is a good idea or not, one could flame about)
> >
> > I fixed my initial blind written script and he did test it and it did
> > work.
> >
> > Attached is the patch to linuxrc from 06-06er release of knoppix.
> >
> > You can also download an boot.img for the 06-06er or before from:
> >
> > http://debian.tu-bs.de/knoppix/RamPatch/boot.img
> >
> > There are also other files like the linuxrc if you don't like patch or
> > the script I use to update my boot.img ;-). (Heh, its very system
> > specific)
> >
> > Klaus, can this get into the official distribution ? Some could like it.
> >
> > cu
> >
> > Fabian
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> > ------------------------------------------------------------------------
> >
> > --- linuxrc.orig 2003-07-26 13:10:09.000000000 +0200
> > +++ linuxrc 2003-07-26 14:27:46.000000000 +0200
> > @@ -236,6 +236,31 @@
> > mountit /dev/cloop /KNOPPIX "-o ro" || FOUND_KNOPPIX=""
> > fi
> >
> > +COPYTORAM=""
> > +case "$CMDLINE" in *toram*) COPYTORAM="yes"; ;; esac
> > +
> > +# Copy the whole cdrom to ram ?
> > +if test -n "$COPYTORAM";
> > +then
> > + # Pre-test if everything succeeded.
> > + if test -n "$FOUND_KNOPPIX"
> > + then
> > + # copy library cache
> > + cat /KNOPPIX/etc/ld.so.cache > /etc/ld.so.cache
> > + echo ""
> > +
> > + echo "Copying /cdrom to RamDisk, this will take a while ..." # Hey,
> > we could use some fancy dialog skript here :-)) + /bin/mkdir /cdrom2
> > + /bin/mount -t tmpfs -o size=800M /dev/shm /cdrom2
> > + /bin/cp -a /cdrom/* /cdrom2 # Copy everything to /cdrom2; yes we
> > need more things then only the KNOPPIX image, we don't want to produce
> > problems we hadn't before, do we ? + umount /KNOPPIX # unmount it
> > + rmmod cloop # release CD
> > + umount /cdrom # unmount CD
> > + insmod -f /modules/cloop.o file=/cdrom2/KNOPPIX/KNOPPIX
> > + mountit /dev/cloop /KNOPPIX "-o ro" || FOUND_KNOPPIX="" # if
> > everything else did suceeded so far, this will hopefully succeed too +
> > fi
> > +fi
> > +
> > # Final test if everything succeeded.
> > if test -n "$FOUND_KNOPPIX"
> > then
> > @@ -257,6 +282,13 @@
> > # From here, we should have all essential commands available.
> > hash -r
> >
> > +# Did we copy from ram ?
> > +if test -n "$COPYTORAM";
> > +then
> > + rmdir /cdrom
> > + ln -s /cdrom /cdrom2 # make a symlink and go on to normal boot
> > +fi
> > +
> > # Clean up /
> > rm -rf /modules /static
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