Unable to change queue parameter for nr_requests on nvme device

Solution Verified - Updated -

Issue

  • When changing the parameter of /sys/block/nvme1/queue/nr_requests from 128 to 512 the system outputs errors like:

    # echo 512 > /sys/block/nvme1/queue/nr_requests
    -bash: echo: write error: Invalid argument
    

Environment

  • Red Hat Enterprise Linux 4
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Intel PCIe Data Center (DC) SSD NVME controller

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