What is the kernel parameters related to maximum size of physical I/O requests?

Solution Verified - Updated -

Issue

  • What is the kernel parameters related to maximum size of physical I/O requests?
  • How do I adjust the maximum I/O transfer size on RHEL?
  • How do I set the maximum block device I/O transfer size on RHEL?
  • How to set custom values for /sys/block/<device>/queue/max_sectors_kb parameters?
  • Default max_sectors_kb setting
  • Do you have a proper way (reboot persistent, applies to current disks (devices), applies to disks (devices) that are added before next reboot) to change the default max_sectors_kb?

Environment

  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 5

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