Move usb to oldusb

[bacula/rescue] / rescue / linux / oldusb / README.technotes

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+
+Technical details of creating the USB key boot images.  Unless
+you want to rebuild (remaster) the iso boot image, you will not
+need this.
+
+The directory "remaster" contains the scripts that allow picking
+apart a Kubuntu Hardy ISO and then updating and recombining the
+parts into a USB boot image.  The information below is somewhat
+low level and should not be needed unless you want to do your
+own remastering either starting from the Kubuntu release or from
+the Bacula remastered release.
+
+Note, the sqfs.tar.gz is the whole squashfs unsquashed.  
+
+The kernel image (vmlinuz) is a copy of the most recent kernel i.e.
+
+  sqfs/boot/vmlinuz-2.6.24-23-generic
+
+and initrd.gz is a copy of the most recent initrd.img i.e
+
+  sqfs/boot/initrd.img-2.6.24-23-generic
+
+they are renamed and put in the kubuntu8 partition in:
+
+  casper/vmlinuz
+and
+  casper/initrd.gz
+
+respectively.
+
+The above updates are automatically done when running
+the write_sqfs_to_disk_image script.  Then the final
+step is to tar up kubuntu8.
+
+Note, initrd.gz is made after fixing the bug in
+/usr/share/initramfs-tools/scripts/casper 
+see note 2. in bugs with Kubuntu boot process below.
+
+When updating the USB root partition (changing something), I 
+strongly recommend that you work with the disk image then
+repack it (pack_disk_image) and then run load_disk_image.
+
+
+Packages needed:
+apt-get install syslinux mbr
+
+
+Kubuntu boot tricks:
+1. Booting with persistence added to the kernel options will permit
+   mounting of a USB casper-rw and home-rw partitions on the USB key.
+   casper-rw is used to store changed OS files, and home-rw is the
+   home directory.
+
+Bugs with Kubuntu boot process:
+1. The initrd.gz image must be opened, fixed and the repacked.
+2. The fix involves removing the ,mode=755 from the mount line for
+   the persistent OS partition (casper-rw) or /cow
+   in /usr/share/initramfs-tools/scripts/casper 
+3. I have removed /etc/rc0.d/S89casper and /etc/rc6.d/S89casper
+   because they are related to a CDROM boot and create false 
+   errors when booting from a USB key.