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Error Logging Management
Summary
If an error is permanent, it is reported each time that the health check is run. If an error
is intermittent, it is logged each time that it occurs. Because a particular error need be
logged only a defined number of times for the automatic error log analysis to determine
that service activity is needed, the device driver stops the repeated logging of the same
error. If error logging were not managed in this way, a repeated error could fill the error
log and hide other errors that other components in the system might have logged. If
error logging management is active for one type of error, a different type of error can
still be sent to the error log. All types of error are, therefore, logged.
Detailed Description
Error logging management is performed for the following error types:
DISK_ERR4 SSA_ENCL_ERR2
SSA_CACHE_BATTERY SSA_HDW_ERROR
SSA_CACHE_ERROR SSA_HDW_RECOVERED
SSA_DEGRADED_ERROR SSA_LINK_ERROR
SSA_DETECTED_ERROR SSA_LINK_OPEN
SSA_DEVICE_ERROR SSA_LOGGING_ERROR
SSA_DISK_ERR1 SSA_REMOTE_ERROR
SSA_DISK_ERR4 SSA_SETUP_ERROR
SSA_ENCL_ERR1 SSA_SOFTWARE_ERROR
If one of these error types is permanent on a particular device, it is reported each time
that the health check is run. The SSA adapter sends the resulting error-log entries to
the device driver. The device driver error logger permits these error-log entries to be
sent on to the error log until the number of entries for that error reaches a
predetermined threshold value. After that value is reached, no more entries of that type
are made for that device until the first error has been in the log for at least six hours.
The example in Figure 41 on page 229 shows an open-link error occurring. This type of
error has a logging threshold value of three. The error is logged when the link is first
broken (in this example, at about 04:30). The error is then logged each hour as a result
of the heath check.
228 User’s Guide and Maintenance Information
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