Disk I/O Event Monitor

Monitors the disk input and output on servers and workstations, ensuring optimal performance and alerting on anomalies.

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Overview

The Disk I/O Event Monitor tracks physical disk I/O performance counters and issues alerts if the measured values exceed specified thresholds. This helps in identifying systems that might be overutilized or underperforming due to disk I/O issues.

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Use Cases

• Performance Monitoring: Detecting systems that are utilizing excessive disk I/O.

Monitoring Options

Connectivity Alerts

• Device Contact: Alert with [Info/Warning/Error/Critical] if PIM+ could not contact the selected device.

Disk Performance Alerts

• Disk Busy Time: Alert if disk busy time is greater than a specified percentage.
• Disk Idle Time: Alert if disk idle time is greater than a specified percentage.
• Total Disk Activity: Alert if total disk activity in bytes per second is greater than specified.
• Disk Read Rate: Alert if disk read bytes per second is greater than specified.
• Disk Write Rate: Alert if disk write bytes per second is greater than specified.
• Disk Queue Length:
  • Overall: Alert if the current disk queue length is greater than specified.
  • Read Queue: Alert if the current disk read queue length is greater than specified.
  • Write Queue: Alert if the current disk write queue length is greater than specified.

Authentication and Security

• Authentication: The account used must be a member of the Performance Monitor Users group or have administrative rights.

Protocols

• PDH

Data Points

Generates a variety of data points, including:

Data Point	Description
% Disk Busy	The percentage of the disk that's busy at the time of the event monitor run.
% Disk Total Bytes/Sec	The total number of bytes/second for the disk.
% Current Disk Queue Length	The length of the disk's queue at the time of the event monitor run.
% Disk Idle	The percentage of the disk that's idle at the time of the event monitor run.
Avg. Disk Read Queue Length	The average length of the disk read queue.
Avg. Disk Write Queue Length	The average length of the disk write queue.
Disk Read Bytes/Sec	The rate at which bytes are transferred from the disk during read operations.
Disk Write Bytes/Sec	The rate at which bytes are transferred from the disk during write operations.

Sample Output: