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Identify Performance Degradation due to Misbehaving Disk in ONTAP

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Category:
data-ontap-8
Specialty:
perf
Last Updated:

Applies to

  • Data ONTAP operating in 7-Mode
  • Clustered Data ONTAP 8
  • ONTAP 9

Description

A disk acting abnormally can affect storage performance. Common symptoms associated with a misbehaving disk are:

  • Higher latency and utilization on one disk than the rest of its partners in the same RAID group
  • Back to back (B or b) Consistency Points in "sysstat" command output