What exactly is the meaning of value "await" reported by iostat?

Updated -

Issue

  • What exactly is the meaning of value "await" reported by iostat?
  • How is "await" time measured and calculated?
  • How is "await" different from "svctm"?
  • What would cause high values within "await"?

Environment

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

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