Table 57 Host Monitoring Support (continued)
Host Configuration | Monitoring Supported? | |
|
|
|
Windows NT 4 |
| N |
|
|
|
Windows 2000 |
| Y |
|
| |
Windows 2000 PowerPath | N | |
|
| |
Windows 2000 HDLM | N | |
|
| |
Windows 2000 RDAC | N | |
|
| |
Windows 2000 DAS | N | |
|
| |
Windows 2000 Volume Manager | N | |
|
|
|
Windows 2000 | Volume Manager and PowerPath | N |
|
|
|
Windows 2000 | Volume Manager and HDLM | N |
|
|
|
In Performance Manager and on the Monitoring tab, charts that display data gathered by certain volume and drive counters display their charts with the results increasing to the maximum value and then decreasing rapidly to a very low number that starts rising again.
The sudden dip in the charts occur because the counters holding the values displayed in the charts can contain at most 231 (2147483648) integers. The counters revert back to zero after reaching
231 (2147483648) integers, and then they continue to go up again. The counters do not usually display zero in a chart, because they are quickly gathering data again.
The following charts for individual drives are impacted: ReadIOs, WriteIOs, TotalIOs, Bytes Transferred, Unrecovered Errors, Recovered Errors, Timeouts, Retried Requests.
The following charts for individual volumes are impacted: Bytes Read, Bytes Read Large, Bytes Written, Bytes Written Large, ReadIOs Large, WriteIOs Large, ReadIOs, WriteIOs, TotalIOs, Bytes Transferred, ReadHitIOs.
Values Continue to Increase in Charts for Aggregated Drives and Aggregate Volumes
Values in charts for aggregate drives and aggregate volumes continue to rise smoothly in Performance Manager and on the Monitoring tab. The only time the values in the charts come back down to the values returned by the array is when the service for the management server restarts, and then the charts display the values returned by the array. The values in the charts continue to rise until the service for the management server is stopped.
The values in the charts continue to rise, because the values do not revert back to zero when an
individual drive or volume counter that makes up the aggregation contains 231 (2147483648) integers. Instead, the values continue to rise smoothly.
414 Viewing Performance Data