Hi, Patt -
Expanding a bit on Niel's info -
Carbon Copy Cloner is intended to be used for/with OSX - hence the protest about the file "Library", which is used by OSX but not by OS 9.
OS 9 can be copied simply by a drag and drop process, and remain bootable.
If there's other stuff on the drive that you want to copy, like perhaps everything on it, then the simplest method is to, after booting to OS 9, drag the icon of the source drive to the target drive and let go - Finder will copy everything to the target drive, placing it all into a folder named the same as the source drive.
About all you then need do is to drag the System Folder, Applications (Mac OS 9) folder, and the Documents folder out of the enclosing folder (the one named the same as the source drive) so that all three are at the root level of the drive. The root level of a drive is what you see when you first open a drive's icon.
Make sure the copied System Folder is "blessed" - a blessed System Folder will display the Mac OS glyph superimposed on a generic folder icon. Then test boot to it to verify the copy's integrity.