The "ASM Health Checker found 1 new failures" message is an indicator that there might be issues affecting your ASM storage environment. Promptly investigating and resolving these issues can help maintain database performance and availability. Always refer to Oracle documentation and support resources for specific guidance tailored to your environment.
This is the most frequent partner error. If the storage layer loses connectivity to a device for even a few seconds, Oracle ASM may drop the disk or force a complete dismount of the disk group to protect against data corruption. In your log, it will typically look like this:
Are you seeing any for your users?
If only one new failure exists, this yields exactly one row with actionable details.
Detection of I/O latency anomalies or missing physical pathways (multipath failures). asm health checker found 1 new failures
: One of the disks in a "Normal Redundancy" disk group has failed, putting the group in a "degraded" state. Parameter Mismatches : An ASM instance parameter (like ASM_POWER_LIMIT
He checked the shared storage. "It's always the hardware," he muttered. But the storage arrays looked green. He then checked the ASM Filter Driver , remembering a bug involving 4k sector drives that had caused similar headaches for peers in the past. Leo ran a quick check of the diskgroup status: Diskgroup: DATA Status: DISMOUNTED Cause: "Insufficient number of disks discovered". The "ASM Health Checker found 1 new failures"
The ASM Health Checker runs continuously within the background processes of an ASM instance to validate disk path availability, write timeouts, and metadata consistency.
: One or more LUNs/disks became inaccessible due to hardware, cable, or storage controller issues. Write I/O Errors This is the most frequent partner error
Connect to the ASM instance and run:
Look for lines containing SQL> select * from v$asm_health_check or health_check_summary . You will see a failure line like: "Check: Disk Path Accessibility, Status: FAIL, Details: Disk DATA_0002 path /dev/mapper/asm_data2 is not readable"