Checking Intermittent Errors; Setting Up Intermittent Error Monitoring; Intermittent Error Monitoring Actions; When An Intermittent Error Occurs - Hitachi XP P9500 User Manual

Checking Intermittent Errors

You can check the paths in which intermittent errors have occurred by
viewing the execution results of the HDLM command's view operation.
For details on the view operation, see
6-30.

Setting Up Intermittent Error Monitoring

When you use the intermittent error function, you can enable or disable the
function. If you enable the function, specify the monitoring conditions: the
error monitoring interval, and the number of times that the error is to occur.
If an error occurs in a path the specified number of times within the specified
error monitoring interval, the system determines that the path has an
intermittent error. For example, if you specify 30 for the error monitoring
interval and 3 for the number of times that the error is to occur, the path is
determined to have an intermittent error if an error occurs 3 or more times in
30 minutes.
You can set up intermittent error monitoring by executing the dlnkmgr
command's set operation.
Intermittent error monitoring can be used only when automatic failback has
already been enabled. The values that can be specified for intermittent error
monitoring depend on the values specified for automatic failbacks. For details
on how to specify the settings, see
on page

Intermittent Error Monitoring Actions

Intermittent error monitoring is performed on each path, and it automatically
starts as soon as a path is recovered from an error by using the automatic
failback function.
This subsection describes the actions for intermittent error monitoring in the
following cases:
•

When an intermittent error occurs

• When an intermittent error does not occur
• When the conditions for an intermittent error to occur are changed during
error monitoring
When an Intermittent Error Occurs
When an error occurs on a path a specified number of times within a specified
interval, the error monitoring will finish and the path is determined to have
an intermittent error, upon which the path is removed from those subject to
automatic failbacks. The path that is removed will remain in the error status
until the online operation is performed. However, if the path satisfies certain
conditions (see
subject to automatic failbacks and change to the Online status.
2-22
6-16.
Figure 2-9 Path Status Transitions on page
HDLM Functions
Hitachi Dynamic Link Manager User Guide (for Solaris(R))
view (Displays Information) on page
set (Sets Up the Operating Environment)
2-20), it will be