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What does option disk.timeout.io.threshold mean

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ontap-9
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hw
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Applies to

ONTAP 9

Answer

  • This threshold specifies the time at which the storage stack will start failing the I/Os back to RAID the next time the I/O is checked if it should be retried.
  • This means that there can still be some time after this threshold is hit before the I/O is failed back to RAID.
  • For example if an I/O was isued to the disk and has not received a response, the I/O must first timeout and be aborted by the adapter driver.
  • Then before that I/O is retried a check is done to see if it has crossed the aggresssive timeout threshold and if so it is failed back to RAID.

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