Getting error while changing the nr_request "echo: write error: Invalid argument"

Solution Unverified - Updated -

Issue

  • Echo command is not allowing to alter the nr_requests on dm.
# echo 1024 > /sys/block/dm-1/queue/nr_requests 
-bash: echo: write error: Invalid argument

Environment

  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7

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