Asm Health - Checker Found 1 New Failures Updated

Use alert -p "text like '%ORA-15%'" to view specific errors related to diskgroups, such as ORA-15063 or ORA-15196 . 2. Analyzing the Failure Source

You can run Health Monitor checks automatically using Oracle Enterprise Manager (OEM) or by scheduling a DBMS_HM.RUN_CHECK PL/SQL job. For example, to run a database structure integrity check every Sunday:

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Update your UDEV rules file if permissions reset after a reboot. Reload UDEV triggers using udevadm trigger . Clear the Health Checker Alert

Here is a deep dive into what this error means, why it happens, and how to resolve it. What is the ASM Health Checker? Use alert -p "text like '%ORA-15%'" to view

$ asmcmd health check ... FAILURE: Disk group DATA – Disk DATA_0002 is offline ...

The alert string indicates that the Oracle Automatic Storage Management internal diagnostic framework has detected a critical structural event, typically resulting in an automated, non-clean dismount of an active disk group. This error is commonly found in the alert_+ASM.log file. It appears when a storage failure cascades past individual disk-level tolerances, forcing the ASM instance to halt I/O operations and initiate a cluster reconfiguration to preserve data integrity. Anatomy of the Failure For example, to run a database structure integrity

Oracle stores all health checker runs in dynamic performance views. To identify which health check reported the failure, query V$HM_RUN :

This message often precedes a disk group going into an INTERMEDIATE or OFFLINE state.