That's what I figured (and tried) but:
Code:
on beforeRunningCopy()
-- Put your own code here that should execute just before running the copy.
-- Inserted to mount clone (G5Backup) before copying
Property diskname : "G5Backup"
tell application "Finder"
if not (exists the disk diskname) then
do shell script "diskutil mount `disktool -l | grep 'G5Backup' | sed 's/.*\\(disk[0-9s]*\\).*/\\1/'`"
delay 1
end if
end tell
delay 2
-- End of insertion
end beforeRunningCopy
gives me, 'Expected “end” but found “property”.' when I try to compile. Sorry I can't fix this myself but with my limited knowledge of Applescript, I can't see how to change this...