[SoaS] Direct SoaS *Bernie Innocenti* bernie at codewiz.org /Mon Jan 18 22:11:47 EST 2010/ * Previous message: [SoaS] Very Urgent! Still need SoaS Help! <000653.html> * Next message: [SoaS] Direct SoaS <000655.html> * *Messages sorted by:* [ date ] [ thread ] [ subject ] [ author ] ------------------------------------------------------------------------ [cc += soas@] Context: I've ripped SoaS apart to generate a USB stick which boots directly off ext3 using Grub. It feels a lot faster, it's cleaner, and certainly doesn't die miserably after writing too much to the LVM overlay. The main downside is that the USB stick is no longer usable with Windows until reformatted. A small loss, if you ask me :-) There's also no swap, but it could be done on a swap file. Anyway, swapping in general is not very elegant and swapping to flash seems like a really dumb idea. On 01/18/10 22:15, Caroline Meeks wrote: >/ you could try running it overnight. Or could you talk Anurag or Daniel />/ through creating one? / It's a simple manual procedure, but I'm going by memory and skipping over the details. If you need more info, I'm always on IRC. * First, loopback mount the ISO (mount -o loop soas.iso /mnt) * Inside the ISO filesystem, you'll find a directory LiveOS containing a big squashfs image. Mount it with a similar command line, maybe to a new directory /mnt2 * Inside this squashfs image, you'll find a third filesystem image, this time ext3. Mount this one too. * Now take a USB stick and use a partition tool such as parted or fdisk to change the partition type to 0x83 (Linux) and make it bootable ("a" on fdisk). * Ensure the USB stick has 255 heads, 63 sectors/track, which is the only supported layout for booting off USB-HD in some BIOSes. parted does this automatically when creating the partition table anew (mklabel). * Format the first partition as ext3 or, better, ext4. * use something like "rsync -aP /mnt3/ /mnt4/" to transfer everything to SoaS filesystem to the newly formatted USB filesystem * Now comes the tricky part: chroot into the partition on the USB stick. To get a working system, you'll have to add a few bind mounts: mount --bind /proc /mnt4/proc mount --bind /dev /mnt4/dev mount --bind /sys /mnt4/sys chroot /mnt4 Voila', you're in! * This should convince grub to install into the MBR of our USB stick: echo '(hd0) /dev/sdX' >/boot/grub/device.map where sdX is the device of the entire USB stick. * grub-install '(hd0)' * exit the chroot and unmount everything in reverse order Now cross your fingers and reboot. If you've accidentally wiped your hard drive MBR or boot partition, reinstall the system and then send me a cheerful comment of your choice. If, instead, it's your lucky day and it boots, it would be a great idea to turn the above instructions into a shell script. Even better yet, someone could modify the soas build scripts to directly produce a bootlable hard disk image for 4GB sticks. 2GB sticks will also work, but they're less common. An interesting research project would be finding a way to automatically resizing the partition table and the filesystem within to fill up the entire media. This could be done on first boot. -- // Bernie Innocenti - http://codewiz.org/ \X/ Sugar Labs - http://sugarlabs.org/ ------------------------------------------------------------------------ * Previous message: [SoaS] Very Urgent! Still need SoaS Help! <000653.html> * Next message: [SoaS] Direct SoaS <000655.html> * *Messages sorted by:* [ date ] [ thread ] [ subject ] [ author ] ------------------------------------------------------------------------ More information about the SoaS mailing list