/tmp (and almost all of your filesystem) isn't writable throughout much of the boot process; indeed, you could say that the entire point of the boot process is to get filesystems writable.
I'm intrigued that your /dev is only 10MB; this appears to be a bug in initramfs-tools ** Summary changed: - No chart genereted after boot + No chart genereted after boot when /dev full -- No chart genereted after boot when /dev full https://launchpad.net/bugs/83206 -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
