Check /var/log/asm for specific error messages or core dumps.

The asm health checker found 1 new failures alert is Oracle’s way of saying: "Something in your storage stack is not perfect." In most cases, it's a disk path issue or an offline disk that can be fixed with a few commands. However, ignoring even one failure invites gradual degradation.

The error is rarely an isolated software bug. Instead, it is a symptom of underlying infrastructural or physical disruptions:

The message is a critical warning often found in Oracle Automatic Storage Management (ASM) alert logs. It typically signals that the system has detected a significant issue—such as disk corruption or a communication breakdown—that could lead to a diskgroup being forcibly dismounted .

: The instance forces a "dirty detach" from the clustered storage domain to shield the rest of the Oracle RAC cluster from corrupted structures. Root Causes of ASM Health Checker Failures

: Ensure the OS can still see all physical devices associated with the ASM disks. Oracle Help Center For more detailed troubleshooting, you can refer to the Oracle Automatic Storage Management documentation or check for tool-specific errors on the Oracle Support portal ASMCMD commands to check for disk redundancy or rebalance status?

Here is a deep dive into what this error means, how to diagnose it, and the steps to resolve it. 1. Understanding the ASM Health Checker

After the repair and any subsequent rebalance operation are complete, re-run the diagnostic CHECK command without the REPAIR clause.

This will provide a , the severity (CRITICAL or HIGH), and a brief description of what went wrong. 3. Common Causes for ASM Failures

). Look for the ORA- errors immediately preceding the "1 new failures" message to identify the specific disk or group affected. Verify Disk Status

-- Check overall disk group status SELECT name, state, type, total_mb, free_mb, required_mirror_free_mb, usable_file_mb FROM v$asm_diskgroup;