Disk Watcher provides the user with the ability to collect either a statistical summary of disk performance data or a trace of all disk I/O events that occur on a system. The trace mode is recommended as it provides more options for analyzing the data and determining potential disk problems. This component is included with the Job Watcher service.

The Disk Watcher GUI provides many graphs with drill downs for each mode of collection (statistical or trace). Using Disk Watcher the user can take a trace and summarize the trace data into an interval size desired for the purpose of easily graphing the statistics at either or broad or detailed level.

Disk Watcher collects:

  • Either statistical (summarized) disk statistics or a trace of every I/O that occurs
  • Object, program and job information associated with each I/O (for trace mode only.)
  • Display Hardware Resources (DSPHDWRSC) command output.

Additional options for analyzing disk performance: