The advertisement says it is « designed not to », but it does. Using scripting ninja skills (and Ubuntu – sorry Windozers and MacOSers), one can reduce the amount of disk scratching by telling CrashPlan to be IO-nice, with the ‘ionice’ command. Open up /usr/local/crashplan/bin/CrashPlanEngine and add this line right before ‘echo « OK »‘:
if [[ $! -gt 0 ]]; then echo $! > $PIDFILE ionice -c 3 -p `cat $PIDFILE` echo "OK" else echo "FAIL" exit 1 fi
This changes the priority of the CrashPlan process to access the disk only when no other process needs access. In other words, CrashPlan should only « work » when your computer is idle.