Ok, i know the conflict: I've booted ubuntu on /dev/sda1 and want to
change exact this harddrive. To solve the conflict it would be a good
idea to use Knoppix and boot from CD-Rom. And then change /dev/sda1.
My problem is that i have no Knoppix CD-ROM. And i also have no
Tomsrtbt-rescue disk or something else. So my idea is to boot Ubuntu
without mounting the harddisk. Perhaps the mysterios "initrd" file can
help me. But i don't know how. Any hints?
http://gparted.sourceforge.net/
Boot a CD with gparted, then all partitions will be modifiable.
gparted also provides a helpful graphical display.
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