hi list, i am trying to change the input and output scheduler on my disks, and it does not allow me , I have several virtualized vm over kvm, and when I try to make the change it shows me this message: echo "noop" > /sys/block/vda/queue/scheduler -bash: echo: write error: Invalid argument kernel version: 3.10.0-1127.13.1.el7.x86_64 any idea? -- rickygm http://gnuforever.homelinux.com