In critical production databases, treating this alert with high urgency prevents localized physical disk faults from cascading into total cluster outages. What Triggers the ASM Health Checker?
When this message appears, it usually follows a specific event like adding a disk, a rebalance operation, or a diskgroup dismount. The "failure" refers to an entry in the , which tracks critical errors that could impact data availability.
When ASM Health Checker reports "Found 1 new failures updated," it indicates that a new issue has been detected and updated in the ASM failure status. This message may seem alarming, but it's essential to investigate and address the underlying issue promptly. The failure could be related to a disk problem, space usage threshold exceeded, or data inconsistency. asm health checker found 1 new failures updated
A DBA was analyzing the ASM alert log and saw: "ASM Health Checker found 1 new failures" . The DBA then ran ALTER DISKGROUP DATA CHECK; and discovered that there was indeed an inconsistency in the disk group metadata—an orphaned extent map entry. After confirming that the database was still operational, the DBA ran ALTER DISKGROUP DATA CHECK ALL REPAIR; . The command completed successfully, the health checker alert cleared, and a subsequent health check reported zero failures.
Immediate investigation is required to determine if the failure is physical (requiring hardware replacement) or logical (requiring resync). Ignoring this alert significantly increases the risk of a total storage outage. In critical production databases, treating this alert with
SELECT * FROM v$asm_operation;
After dropping the failed disk, the disk group will rebalance automatically. Monitor the rebalance progress via V$ASM_OPERATION . The "failure" refers to an entry in the
The message "ASM Health Checker found 1 new failures updated" indicates that during a scheduled or automatic health check run, the checker has discovered exactly one new persistent data failure that was not previously recorded. This could be due to:
The disk group has dropped offline. This indicates a loss of disk quorum. 3. Check for Ongoing Rebalance Operations
Oracle tracks all health check executions in the V$HM_RUN view. Run the following query to see recent checks:
In effect, the ASM Health Checker acts as a built‑in, automated diagnostics tool that confirms whether your storage structures remain healthy without waiting for user queries to hit a corrupted block.