Once you have resolved the immediate issue and the message "ASM Health Checker found 1 new failures updated" no longer appears, implement these preventive measures.
If you are an Oracle Database Administrator (DBA) managing an Oracle Real Application Clusters (RAC) environment, you have likely encountered a cryptic but critical message in your alert logs or monitoring console: "ASM Health Checker found 1 new failures updated." asm health checker found 1 new failures updated
At first glance, this message can induce panic. Does it mean data loss? Is your disk group about to crash? Will your production database go offline? Fortunately, in most cases, this alert is a proactive warning from Oracle’s Automatic Storage Management (ASM) diagnostics framework. However, ignoring it can lead to severe performance degradation or service interruption. Once you have resolved the immediate issue and
This comprehensive guide will dissect every aspect of this error message. We will explore what the ASM Health Checker is, why it triggers this alert, how to diagnose the specific failure, and step-by-step remediation strategies. If a disk was accidentally taken offline or
If a disk was accidentally taken offline or lost connectivity but is now accessible:
ALTER DISKGROUP data ONLINE DISK data_0003;
Wait for the recovery to complete (monitor via v$asm_operation). Once done, the health checker will automatically clear the failure and log a corresponding "failure cleared" message.
| Failure Type | Example | |-------------|---------| | Disk offline | A disk in a disk group is offline or missing. | | Disk path error | Underlying LUN/device path inaccessible. | | Read/write errors | OS or storage reports I/O errors. | | Stale disk | Disk not synchronized with partner disks. | | Failure group issues | Entire failure group degraded. |