How to change the I/O scheduler for Dell EMC Powerpath devices?

Solution Verified - Updated -

Issue

  • How to change the I/O scheduler for Dell EMC Powerpath devices?
  • Adding "elevator=deadline" in grub kernel commandline didn't change IO scheduler for Powerpath devices and it sub paths.
# cat /sys/block/emcpowera/queue/scheduler
[noop] deadline cfq

# cat /sys/block/sdq/queue/scheduler
[noop] deadline cfq

Environment

  • Red Hat Enterprise Linux 7
    • Dell EMC Powerpath

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