Debian installed in Flash instead of uSD
Eli
retracile at gmail.com
Fri Aug 22 06:05:27 CEST 2008
All,
I got the Debian install to fit in flash, even with several extra things (like
vim-gtk) installed, and it's currently showing 53M free. Here are (somewhat
cleaned up) instructions:
Using the install.sh, installed Debian on my 4GB uSD card.
Booted into Debian, did my apt-get stuff to add packages. In particular, I
added:
apt-get install subversion python-crypto python-gdbm python-gtk2 xauth x2x
python-pysqlite2 vim-gtk gpaint tangogps gpsd apmd patch patchutils
You probably will want to "apt-get clean" at this point.
mkdir /var/tmp/root
mount /dev/root /var/tmp/root
On my workstation:
ssh root at 192.168.0.202 "mkfs.jffs2 -d /var/tmp/root -e
128 --pad --no-cleanmarkers" | pv -W > debian-rootfs.jffs2
(The "| pv -W" is optional, it just gives you something to watch as the bytes
fly by.)
Copy the /boot/uImage.bin to the workstation. (Or wget the one the install.sh
grabbed.)
Use dfu-util to flash the kernel image and the rootfs.
Boot into Debian from the uSD again.
mount /mnt/flash
vim /mnt/flash/etc/fstab
1) Change the filesystem type for the rootfs line to jffs2
2) Comment out the mmcblk0p1 and mtdblock6 lines
3) Add a line:
tmpfs /var/cache/apt tmpfs defaults,noatime 0 0
... and save your changes.
rm -rf /mnt/flash/var/cache/apt/*
umount /mnt/flash
Reboot, and let the FR boot from its internal flash. It will take a while,
but debian should boot.
If you want to run apt-get, you will need to
mkdir -p /var/cache/apt/archives/partial
(This
http://www.nabble.com/Bug-314334:-apt:-APT-doesn't-work-on-filesystems-without-shared-writeable-mmap(),-like-JFFS2-td19080729.html
may be a better solution, but I haven't tried it.)
apt-get update took 5 minutes for me, and used a dozen MB in the rootfs
temporarily, but I'm not anticipating apt-get to be a daily task on this once
I get the basics worked out.
The tmpfs for /var/cache/apt is necessary because apt uses mmap for some stuff
in /var/cache/apt, and that doesn't appear to play well with jffs2.
Comments, suggestions, etc, welcome.
Eli
------------------. "If it ain't broke now,
Eli Carter \ it will be soon." -- crypto-gram
retracile at gmail.com `-------------------------------------------------
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