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The Disk I/O Action

The disk I/O action produces a text report that summarizes the various metrics regarding disk I/O. The usage for this action is:

-a diskio [-util -summary -counts -detail] 
Option Description
util [n]
Show disk utilization for n second intervals, default 1 second
summary
Show IO summary report for each file
detail
Show details of each IO
overlap
Show overlapping of IOs
range T1 T2
Show data between times T1 and T2, both in use

If no report type is selected, default is to show disk utilization report.