I have started read-scan the disk using:smartctl -t select,10-11 -t afterselect,on -t pending,45 /dev/sdaIt seems, however, it kills the disk performance. I had expected that the read-scan would (just like the tests) be suspended when there was disk activity.I had also expected the read scan (like the tests) would run without load on the server, but according to iostat -x -d 1 it seems read-test goes through the controller.Is this normal? Can I suspend the read scan when the disk is active (e.g. only run read scan if idle for 500 ms)?
smartctl: suspend read-scan the remainder of the disk
smart;smartctl