Pausing rsync via bash script?

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http://unix.stackexchange.com – Is there a way to pause rsync via command line, if it transfers data for over X minutes? I'm working on using it as a backup and would like it to pause every once in a while to prevent the hard disks from overheating or network throttling. I am currently using a Windows batch file to start a Linux bash script via cygwin to do this. (HowTos)