This metric shows the detail of the total number of failed read/writes for the disk. This provides information about the total number of failed attempts of reads and writes for the disk.
The rest of the information in this section is only valid for this metric when it appears in either the Enterprise Manager Grid Control or the Enterprise Manager Database Control (if applicable).
The following table shows how often the metric's value is collected and compared against the default thresholds. The 'Consecutive Number of Occurrences Preceding Notification' column indicates the consecutive number of times the comparison against thresholds should hold TRUE before an alert is generated.
|
Target Version |
Evaluation and Collection Frequency |
Upload Frequency |
Operator |
Default Warning Threshold |
Default Critical Threshold |
Consecutive Number of Occurrences Preceding Notification |
Alert Text |
|
10.1.0.x; 10.2.0.x; 11.1.0.x; 11.2.0.x |
Every 15 Minutes |
After Every Sample |
> |
Not Defined |
0 |
1 |
Disk %dg_name%.%disk_name% has %value% Read/Write errors. |
For this metric you can set different warning and critical threshold values for each unique combination of "Instance ID", "Disk Group Name", and "Disk Name" objects.
If warning or critical threshold values are currently set for any unique combination of "Instance ID", "Disk Group Name", and "Disk Name" objects, those thresholds can be viewed on the Metric Detail page for this metric.
To specify or change warning or critical threshold values for each unique combination of "Instance ID", "Disk Group Name", and "Disk Name" objects, use the Edit Thresholds page. See Editing Thresholds for information on accessing the Edit Thresholds page.
It is calculated using the GV$ASM_DISKGROUP and GV$ASM_DISK views for 10g Release 1 and the GV$ASM_DISKGROUP_STAT and GV$ASM_DISK_STAT views for 10g Release 2. From these views, the total number of failed read/writes for the disk is added to calculate the read write errors detail.
Investigate the issues behind read/write errors.
Related Topics
About Alerts
About the Metric Detail Page
Editing Thresholds
Understanding Line Charts
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