Navigate to the log group associated with your health checker (e.g., /aws/lambda/SecretsManagerHealthChecker ).
Failure detected in ASM (Application Security Manager) Health Checker. 🚨 Critical Alert: ASM Health Check Failure
This specific warning indicates that the internal Oracle background monitoring engine has detected an issue affecting the state, configuration, or performance of an ASM disk group or its underlying physical storage components. What is the ASM Health Checker? asm health checker found 1 new failures
In conclusion, the ASM health checker’s finding of one new failure should not be dismissed as a minor anomaly nor greeted with alarmist dread. Instead, it should be received with professional respect. It is a precise, actionable signal in a sea of ambient noise. It reminds us that in the architecture of high-availability systems, the smallest crack, left unexamined, can propagate through the structure. By investigating, resolving, and learning from that single failure, an organization does more than fix a disk—it strengthens the resilience of its entire data ecosystem. The silent alarm was never meant to be ignored; it was meant to be heard by those who understand that vigilance is the price of reliability.
When a physical drive develops bad sectors, or the SAN controller drops a drive configuration, the operating system registers a hard kernel fault. Oracle ASM tracks these via asynchronous write errors ( osderr1 , osderr2 ), prompting the health checker to flag a failure. 2. Storage Area Network (SAN) Disconnects Navigate to the log group associated with your
When the ASM Health Checker reports "1 new failures," it means that during its last check, it detected one or more issues that could potentially impact the health and performance of your ASM storage. These issues could range from configuration problems, performance bottlenecks, to hardware failures.
Fix: Run the repair utility: /usr/share/ts/bin/add_del_internal add repair_db 1 (Note: This may require a restart of the ASM services). 2. Partition Disk Usage What is the ASM Health Checker
It turned out a routine disk add operation from earlier that morning had gone sideways. A subtle corruption on had been lying in wait. When the ASM rebalance operation hit that specific block, the Health Checker—a silent guardian that usually stays in the background—spotted the anomaly and pulled the emergency brake to prevent further data loss.
The error message indicates that your Oracle Automatic Storage Management (ASM) instance has detected a critical hardware or software fault, most commonly resulting in an automatic disk offline or a disk group dismount. When this message appears in your alert.log , it is an explicit notification from Oracle's fault diagnosability framework that storage redundancy is compromised. You must address it immediately to avoid a full cluster outage or potential data loss. Anatomy of the Failure
Sometimes the failure is not about the disks themselves, but about the ASM instance’s ability to manage them—such as running out of processes or memory in the SGA. 4. How to Resolve the Failure